CN111133612A - Electrode for electricity storage device, and method for manufacturing electrode for electricity storage device - Google Patents

Electrode for electricity storage device, and method for manufacturing electrode for electricity storage device Download PDF

Info

Publication number
CN111133612A
CN111133612A CN201880061165.6A CN201880061165A CN111133612A CN 111133612 A CN111133612 A CN 111133612A CN 201880061165 A CN201880061165 A CN 201880061165A CN 111133612 A CN111133612 A CN 111133612A
Authority
CN
China
Prior art keywords
electrode
storage device
lead
collector plate
electric storage
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN201880061165.6A
Other languages
Chinese (zh)
Other versions
CN111133612B (en
Inventor
井户贵彦
守屋茂树
前田伸也
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ibiden Co Ltd
Original Assignee
Ibiden Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ibiden Co Ltd filed Critical Ibiden Co Ltd
Publication of CN111133612A publication Critical patent/CN111133612A/en
Application granted granted Critical
Publication of CN111133612B publication Critical patent/CN111133612B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/531—Electrode connections inside a battery casing
    • H01M50/533—Electrode connections inside a battery casing characterised by the shape of the leads or tabs
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/056—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes
    • H01M10/0564—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes the electrolyte being constituted of organic materials only
    • H01M10/0566—Liquid materials
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/04—Processes of manufacture in general
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
    • H01M4/134—Electrodes based on metals, Si or alloys
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
    • H01M4/139—Processes of manufacture
    • H01M4/1395—Processes of manufacture of electrodes based on metals, Si or alloys
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/36—Selection of substances as active materials, active masses, active liquids
    • H01M4/38—Selection of substances as active materials, active masses, active liquids of elements or alloys
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/64—Carriers or collectors
    • H01M4/66—Selection of materials
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/531—Electrode connections inside a battery casing
    • H01M50/534—Electrode connections inside a battery casing characterised by the material of the leads or tabs
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/531—Electrode connections inside a battery casing
    • H01M50/536—Electrode connections inside a battery casing characterised by the method of fixing the leads to the electrodes, e.g. by welding
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Abstract

The invention provides an electrode for an electricity storage device, which can ensure high connection reliability and has high strength even if a current collecting plate provided with an electrode part containing silicon as an active material is used. An electrode for an electric storage device according to the present invention is an electrode for an electric storage device including a collector plate, an electrode portion, and a lead, the collector plate including a main body portion and a lead portion, the electrode portion being disposed on the main body portion of the collector plate, the lead being connected to the lead portion of the collector plate, wherein the lead portion and the main body portion are formed of stainless steel of the same material; the stainless steel is an austenitic stainless steel including a martensitic structure; the electrode portion contains silicon as an active material.

Description

Electrode for electricity storage device, and method for manufacturing electrode for electricity storage device
Technical Field
The present invention relates to an electrode for an electric storage device, and a method for manufacturing an electrode for an electric storage device.
Background
An electric storage device using a metal having a high tendency to be converted into lithium plasma is used in many fields because it can store a large amount of energy.
As a method for manufacturing such an electric storage device, patent document 1 discloses a method for manufacturing an electric storage device including: the method for producing a lithium secondary battery includes a positive electrode formed on a positive electrode collector plate having a through-hole, a negative electrode formed on a negative electrode collector plate having a through-hole, and a nonaqueous electrolyte solution containing a lithium salt, wherein the positive electrode contains a carbonaceous material having a layered structure capable of inserting and extracting anions as a positive electrode active material, and the negative electrode contains a carbonaceous material having a layered structure capable of inserting and extracting lithium ions as a negative electrode active material, and the method includes the steps of: a step of manufacturing a battery cell for an electric storage device, in which a laminate obtained by laminating the positive electrode and the negative electrode with a separator interposed therebetween and a lithium ion supply source are arranged, and the nonaqueous electrolytic solution is injected; a charge/discharge step of performing charge/discharge between the positive electrode and the lithium ion supply source; and a storage step of allowing electrochemical contact between the negative electrode and the lithium ion source to store lithium ions in the negative electrode.
In the method for manufacturing an electric storage device described in patent document 1, metallic lithium is used as a lithium ion supply source. The lithium ion supply source is used to charge and discharge between the positive electrode and the lithium ion supply source, and further, the negative electrode and the lithium ion supply source are brought into electrochemical contact with each other to store lithium ions in the negative electrode.
When an electric storage device is manufactured by the method described in patent document 1, metallic lithium as a lithium ion supply source remains in the electric storage device.
The metallic lithium contained in the lithium ion supply source is a flammable hazardous material. Therefore, it is preferable that the metallic lithium does not remain in the electricity storage device.
Patent document 2 describes the use of a carbonaceous material pre-doped with lithium ions as such a lithium ion supply source.
That is, it is described that carbonaceous materials are fixed to a current collecting plate, lithium ions are included between layers of the carbonaceous materials by intercalation, and the carbonaceous materials are used as lithium-containing electrodes.
By using such a lithium ion-containing electrode, it is possible to charge and discharge between the positive electrode and the lithium ion supply source without using lithium metal, and further, it is possible to cause electrochemical contact between the negative electrode and the lithium ion supply source, thereby trapping lithium ions in the negative electrode.
However, in the case where lithium ions are included in a carbonaceous material by intercalation, the amount of lithium ion occlusion has a theoretical upper limit of 372mAh/g, and cannot exceed this upper limit. Therefore, research into materials capable of occluding more lithium ions than carbonaceous materials has been conducted.
Documents of the prior art
Patent document
Patent document 1: japanese patent laid-open publication No. 2014-211950
Patent document 2: japanese patent laid-open publication No. 2016-103609
Disclosure of Invention
Problems to be solved by the invention
Silicon is known as a substance that can be alloyed with lithium ions and can occlude lithium ions. In the case of using silicon to store lithium ions, it is theoretically considered that lithium ions of 4000mAh/g or more can be stored.
That is, when lithium ions are occluded by silicon, the occlusion amount of lithium ions per unit volume is large, and the electric storage device can have a high capacity.
However, there is a problem that expansion and contraction of the active material itself increase when lithium ions are occluded and released.
Therefore, when silicon is fixed to the collector plate and used as an electrode, the collector plate is significantly deformed, and the collector plate is warped or wrinkled. Because of such a problem, when silicon is used as the active material, the current collecting plate is deformed in the power storage device, which leads to a problem of reduced connection reliability.
An object of the present invention is to provide an electrode for an electricity storage device, which can ensure high connection reliability and has high strength even when a current collecting plate provided with an electrode portion containing silicon as an active material is used, a method for manufacturing the same, and an electricity storage device using the electrode for an electricity storage device.
Means for solving the problems
(1) An electrode for an electric storage device of the present invention is an electrode for an electric storage device, comprising a collector plate, an electrode portion, and a lead, wherein the collector plate comprises a main body portion and a lead portion, the electrode portion is disposed on the main body portion of the collector plate, and the lead is connected to the lead portion of the collector plate,
the lead-out part and the main body part are made of stainless steel of the same quality,
the stainless steel is an austenitic stainless steel including a martensitic structure,
the electrode portion contains silicon as an active material.
In the electrode for an electric storage device according to the present invention, the current collecting plate is formed of austenitic stainless steel containing a martensite structure.
The hardness of the martensite structure is high. Therefore, when the current collector plate is formed of austenitic stainless steel including a martensite structure, the current collector plate can be made hard and high in strength. Therefore, the collector plate is easily prevented from warping or wrinkling.
Therefore, even when the volume of the active material changes due to the metal ions being occluded in the active material of the electrode portion or due to the metal ions being released from the active material occluded in the electrode portion, the current collector plate is easily prevented from warping or wrinkling.
In the electrode for an electric storage device according to the present invention, the lead portion connected to the lead wire and the main body portion are formed of stainless steel of the same material.
That is, when the lead and the current collecting plate are connected, the connection is performed by a method in which the current collecting plate is not denatured without heating.
Therefore, the strength of the lead portion connected to the lead is sufficiently increased, and the function of the current collecting plate is not easily lowered.
The electrode for an electric storage device of the present invention is preferably in the following embodiment.
(2) In the electrode for an electric storage device according to the present invention, it is preferable that the current collector plate has a cross section taken in a thickness direction, and a martensite structure is dispersed in an island-like manner in an austenite structure.
The martensite structure is dispersed in the austenite structure in the shape of islands, and it can be said that the content (mass) of the austenite structure is larger than that of the martensite structure.
Since the austenite structure is chemically stable, the collector plate thus configured is less likely to be corroded or eluted.
(3) In the electrode for an electric storage device according to the present invention, the elastic modulus of the lead is preferably smaller than that of the collector plate.
When the elastic modulus of the lead is smaller than that of the collector plate, the lead absorbs external force or vibration when receiving the external force or vibration. Therefore, a strong force is not easily applied to the connection portion of the lead and the current collecting plate, and the connection portion of the lead and the current collecting plate is not easily broken.
(4) In the electrode for an electric storage device according to the present invention, the lead preferably contains at least one selected from the group consisting of nickel, copper, aluminum, and brass.
These materials have high electrical conductivity and are excellent as materials for lead wires.
In addition, these substances can be firmly connected to stainless steel by ultrasonic welding. Therefore, the connection strength between the lead and the current collecting plate can be sufficiently improved.
(5) In the electrode for an electric storage device of the present invention, the above lead wire may be plated with at least one selected from the group consisting of nickel, gold, silver, zinc, and chromium.
These substances can be firmly joined to stainless steel by ultrasonic welding. Therefore, the connection strength between the lead plated with these substances and the current collecting plate can be sufficiently improved.
In addition, a material having a low elastic modulus can be used as the core material of the lead, and the elastic modulus of the entire lead can be reduced.
(6) In the electrode for an electricity storage device of the present invention, the active material preferably contains only silicon.
Silicon can occlude metal ions by alloying with the metal ions.
Therefore, a larger amount of metal ions can be occluded as compared with a substance in which metal ions are occluded by intercalation, such as carbon. In particular, lithium ions can be occluded at 4000mAh/g or more.
Therefore, the capacitance can be sufficiently increased.
When a large amount of metal ions are occluded in silicon or released from silicon in this manner, the volume of silicon as an active material changes significantly. When the volume of silicon changes in this manner, the collector plate is likely to be wrinkled or warped.
However, in the electrode for an electric storage device according to the present invention, the current collecting plate is formed of austenitic stainless steel containing a martensite structure. Therefore, even when the volume of silicon changes, the collector plate is less likely to warp or wrinkle.
(7) The electrode for an electric storage device of the present invention can be used as a metal ion supply electrode for supplying metal ions to an electrolytic solution.
The electrode for an electric storage device of the present invention can be used not only as a positive electrode or a negative electrode of an electric storage device, but also as a metal ion supply electrode.
(8) The electric storage device of the present invention is characterized by comprising the electrode for an electric storage device of the present invention.
Therefore, in the electric storage device of the present invention, the current collecting plate of the electrode for an electric storage device is less likely to be wrinkled or warped.
(9) The method for manufacturing an electrode for an electric storage device according to the present invention is a method for manufacturing an electrode for an electric storage device, the electrode including a collector plate, an electrode portion, and a lead, the collector plate including a main body portion and a lead portion, the electrode portion being disposed on the main body portion of the collector plate, the lead being connected to the lead portion of the collector plate,
the manufacturing method comprises an ultrasonic connecting step of connecting the lead-out part and the lead wire by ultrasonic welding,
the current collector plate is formed of austenitic stainless steel containing a martensite structure,
the electrode portion contains silicon as an active material.
In the method for manufacturing an electrode for an electric storage device according to the present invention, a current collecting plate and a lead are connected by ultrasonic welding.
When a part of the collector plate or a part of the lead is melted by heat such as resistance welding to connect the collector plate and the lead, stainless steel forming the collector plate is denatured by heat. When such denaturation occurs, there is a problem that partial thermal deformation occurs and the function of the collector plate is reduced.
On the other hand, ultrasonic welding is a method capable of connecting metals to each other without generating heat. Therefore, when ultrasonic welding is used, the current collecting plate and the lead can be connected without being deformed. Therefore, the strength of the lead portion connected to the lead is sufficiently increased, and the function of the current collecting plate is not easily lowered.
ADVANTAGEOUS EFFECTS OF INVENTION
In the electrode for an electric storage device according to the present invention, the lead portion connected to the lead wire and the main body portion are formed of stainless steel of the same material.
That is, when the lead is connected to the current collecting plate, the current collecting plate is not denatured.
Therefore, partial thermal deformation is less likely to occur, the strength of the lead portion connected to the lead is sufficiently increased, and the function of the collector plate is less likely to be degraded.
Drawings
Fig. 1 is a cross-sectional view schematically showing an example of an electrode for an electric storage device according to the present invention.
Fig. 2 is a cross-sectional view schematically showing an example of a cross section of the current collecting plate in the electrode for an electric storage device according to the present invention, the cross section being cut in the thickness direction.
Detailed Description
The electrode for an electric storage device of the present invention will be described below with reference to the drawings, but the electrode for an electric storage device of the present invention is not limited to the following description.
Fig. 1 is a cross-sectional view schematically showing an example of an electrode for an electric storage device according to the present invention.
As shown in fig. 1, the electrode 10 for an electric storage device includes a current collector plate 20, an electrode portion 30 formed on both surfaces of the current collector plate 20, and a lead 40 connected to an end of the current collector plate 20.
The lead portion 21 and the main body portion 22 are formed of stainless steel of the same material.
The stainless steel forming the current collector plate 20 is an austenitic stainless steel including a martensite structure.
The electrode portion 30 contains silicon as an active material.
In the electrode 10 for an electric storage device, the current collector plate 20 is formed of austenitic stainless steel containing a martensite structure.
The hardness of the martensite structure is high. Therefore, when the current collector plate 20 is formed of austenitic stainless steel including a martensite structure, the current collector plate 20 can be made hard and high in strength. Therefore, the occurrence of warping or wrinkling of the current collector plate 20 is easily prevented.
Therefore, even when the volume of the active material changes due to the metal ions being occluded in the active material of the electrode portion 30 or due to the metal ions being released from the active material occluded in the electrode portion, the current collector plate 20 is easily prevented from warping or wrinkling.
In the electrode 10 for an electric storage device, the lead portion 21 and the body portion 22 are formed of stainless steel of the same material.
As described in detail later, when the lead 40 is connected to the current collecting plate 20, the current collecting plate 20 is not denatured.
Therefore, partial thermal deformation does not easily occur, and the main body portion 22 has sufficient strength.
In the electrode 10 for an electric storage device, it is preferable that the martensite structure is dispersed in island form in the austenite structure in the cross section of the current collector plate 20 cut in the thickness direction.
The following describes a state in which the martensite structure is dispersed in the austenite structure in island form, with reference to the drawings.
Fig. 2 is a cross-sectional view schematically showing an example of a cross section of the current collecting plate in the electrode for an electric storage device according to the present invention, the cross section being cut in the thickness direction.
In fig. 2, reference numeral 26 denotes a martensite structure, and reference numeral 27 denotes an austenite structure.
As shown in fig. 2, the phrase "the martensite structure is dispersed in the austenite structure in the form of islands" in the present specification means that the martensite structure 26 is present in the austenite structure in the form of patches without being localized.
The martensite structure is dispersed in the austenite structure in the shape of islands, and it can be said that the content (mass) of the austenite structure is larger than that of the martensite structure.
Since the austenite structure is chemically stable, the collector plate thus configured is less likely to be corroded or eluted.
The existence of the martensite structure and the austenite structure can be analyzed by an electron back scattering diffraction pattern measurement method (EBSD method) under the following conditions.
(conditions of EBSD method)
< analyzing apparatus >
EF-SEM: JSM-7000F/EBSDD, manufactured by Japan electronic Co., Ltd: TSL Solution
< analysis conditions >
The range is as follows: 14X 36 μm
Step length: 0.05 μm/step
Measurement points: 233376
Multiplying power: 5000 times of
Phase of gamma-iron, α -iron
In the present specification, the phrase "the lead portion and the main body portion are formed of a homogeneous stainless steel" means that the structures constituting the lead portion and the main body portion are continuous structures, and the following results are obtained by the EBSD method.
That is, the phrase "the lead-out portion and the main body portion are formed of the same stainless steel" means the following case:
the structure constituting the lead-out portion 21 and the main body portion 22 is a continuous structure, and there is no interface between them, and the area of the martensite structure in the cross section of the lead-out portion 21 cut in the thickness direction is 5 to 20% of the entire cross section, and the area of the martensite structure in the cross section of the main body portion 22 cut in the thickness direction is 5 to 20% of the entire cross section.
The area of the martensite structure in the cross section obtained by cutting the lead-out portion 21 in the thickness direction is preferably 5 to 20% of the entire cross section.
The area of the martensite structure in the cross section of the body 22 cut in the thickness direction is preferably 5 to 20% of the entire cross section.
When the area of the martensite structure in the cross section obtained by cutting the lead portion 21 in the thickness direction and the area of the martensite structure in the cross section obtained by cutting the main body portion 22 in the thickness direction are within the above ranges, the current collector plate is less likely to corrode and has high strength.
When the area occupied by the martensite structure in the cross section is less than 5%, the strength improvement effect of the current collector plate due to the inclusion of the martensite structure is not easily obtained.
When the area occupied by the martensite structure in the cross section is more than 20%, the martensite structure is easily exposed on the surface, and the martensite structure continuously exists in the current collector plate, so that the entire current collector plate is easily corroded. Further, since the ratio of the martensite structure is increased, the toughness of the current collecting plate is easily lowered, and as a result, the current collecting plate is easily broken.
In the electrode 10 for an electricity storage device, the thickness of the current collecting plate 20 is preferably 5 to 50 μm.
When the thickness of the collector plate is less than 5 μm, the collector plate is too thin, and thus the collector plate is easily broken.
When the thickness of the current collecting plate is larger than 50 μm, the thickness is too large, and therefore the size of the electric storage device using the electrode for an electric storage device including the current collecting plate having such a thickness is likely to increase.
The tensile strength of the current collector plate 20 is not particularly limited, but is preferably 300 to 1500 MPa.
In the electrode 10 for an electric storage device, the lead 40 preferably has a lower elastic modulus than the current collecting plate 20.
When the elastic modulus of the lead 40 is smaller than that of the collector plate 20, the lead 40 absorbs external force or vibration when receiving the external force or vibration. Therefore, a strong force is not easily applied to the connection portion of the lead 40 and the current collector plate 20, and the connection portion of the lead 40 and the current collector plate 20 is not easily broken.
In the electrode 10 for an electric storage device, the elastic modulus of the lead 40 is preferably 50 to 150 GPa.
In the electrode 10 for an electric storage device, the elastic modulus of the current collecting plate 20 is preferably 150 to 250 GPa.
In the electrode 10 for an electricity storage device, the vickers hardness of the current collecting plate 20 is preferably 300 to 500.
In the electrode 10 for an electricity storage device, the lead wire 40 preferably contains at least one selected from the group consisting of nickel, copper, aluminum, and brass.
These materials have high electrical conductivity and are excellent as materials for lead wires.
In addition, these substances can be firmly joined to stainless steel by ultrasonic welding. Therefore, the connection strength between the lead and the current collecting plate can be sufficiently improved.
In the electrode 10 for an electricity storage device, the lead wire 40 may be plated with at least one selected from the group consisting of nickel, gold, silver, zinc, and chromium.
These substances can be firmly joined to the stainless steel by ultrasonic welding. Therefore, the connection strength between the lead plated with these substances and the current collecting plate can be sufficiently improved.
In addition, a material having a low elastic modulus can be used as the core material of the lead, and the elastic modulus of the entire lead can be reduced.
The cross-sectional shape of the lead is not particularly limited. Any shape such as circular, rectangular, and plate-like can be used.
In the electrode for an electricity storage device 10, the electrode portion 30 preferably contains an active material and a binder.
The active material may contain carbon or the like in addition to silicon.
The average particle size of the active material is not particularly limited, but is preferably 1 to 10 μm.
When the average particle size of the active material is 1 μm or more, the average particle size of the active material can be easily adjusted.
When the average particle diameter of the active material is 10 μm or less, the specific surface area is sufficiently increased, and therefore, the time required for doping can be shortened.
In the electrode 10 for an electricity storage device, the active material in the electrode portion 30 preferably contains only silicon.
Silicon can occlude metal ions by alloying with the metal ions.
Therefore, a larger amount of metal ions can be occluded as compared with a substance in which metal ions are occluded by intercalation, such as carbon. In particular, lithium ions can be occluded at 4000mAh/g or more.
Therefore, when the active material contains only silicon, the capacitance can be sufficiently increased.
When a large amount of metal ions are occluded in silicon or released from silicon, the volume of silicon as an active material changes significantly. When the volume of silicon changes in this manner, the collector plate is likely to be wrinkled or warped.
However, in the electrode for an electric storage device according to the present invention, the current collecting plate is formed of austenitic stainless steel containing a martensite structure. Therefore, even when the volume of silicon changes, the collector plate is less likely to warp or wrinkle.
The material of the binder of the electrode portion 30 is not particularly limited, and polyimide resin, polyamideimide resin, and the like can be given. Among these, polyimide resins are preferred.
Polyimide resins are compounds having heat resistance and strength. Therefore, when the active material is bonded with the binder made of polyimide resin, even if the volume of the active material changes due to occlusion and release of metal ions, the electrode portion 30 can be made less likely to be peeled off from the current collector plate 20.
The weight ratio of the active material to the binder in the electrode portion 30 is preferably active material: binder 70: 30-90: 10.
in addition, a conductive auxiliary agent may be contained in the binder of the electrode portion 30.
The material of the conductive assistant is not particularly limited, and examples thereof include carbon black, carbon fiber, and carbon nanotube. Among these, carbon black is preferably contained.
When the binder contains a conductive assistant, the conductivity of the electrode 10 for an electricity storage device can be improved. Therefore, current can be efficiently collected.
In particular, when the amount of carbon black is small, the conductivity can be secured. Therefore, when carbon black is used as the conductive aid, the electrical conductivity of the electrode 10 for an electrical storage device can be further improved.
When the conductive additive contains carbon black, the average particle diameter is preferably 3 to 500 nm.
In the electrode portion 30, the weight ratio of the conductive auxiliary agent in the binder is preferably 20 to 50%.
In the electrode 10 for an electricity storage device, the thickness of the electrode portion 30 is not particularly limited, but is preferably 5 to 50 μm.
When the thickness of the electrode portion is less than 5 μm, the amount of the active material is reduced as compared with the current collector plate, and thus the capacitance is easily reduced.
When the thickness of the electrode portion is more than 50 μm, the size of the electric storage device manufactured using the electrode for an electric storage device increases. Further, the distance of movement of the metal ions in the electrode portion becomes long, and it takes time to charge and discharge.
The area density of the electrode portion 30 on one surface is not particularly limited, but is preferably 0.1 to 10mg/cm2。
The electrode for an electric storage device of the present invention can be used as a positive electrode or a negative electrode of an electric storage device or a metal ion-supplying electrode for doping an electrolyte with metal ions.
Next, a method for manufacturing an electrode for an electric storage device according to the present invention will be described.
The method for manufacturing an electrode for an electric storage device according to the present invention is a method for manufacturing an electrode for an electric storage device including a current collecting plate including a main body portion and a lead portion, an electrode portion disposed on the current collecting plate, and a lead connected to the current collecting plate, wherein the method includes an ultrasonic connecting step of connecting the current collecting plate and the lead by ultrasonic welding.
In addition, the current collector plate is formed of austenitic stainless steel containing a martensite structure, and the electrode portion contains silicon as an active material.
An example of the method for producing the electrode for an electric storage device of the present invention will be described in detail below.
(1) Process for producing collector plate
First, a metal plate made of austenitic stainless steel is prepared.
Next, the collector plate is produced by performing extension processing on the metal plate. By this drawing process, a part of the austenite structure is transformed into a martensite structure.
The extension processing is preferably cold processing in such a manner that the thickness of the cold rolled steel sheet is 60 to 80% of the original thickness.
In this manner, a current collecting plate made of austenitic stainless steel including a martensite structure can be produced.
(2) Process for producing active material slurry
Silicon and a binder are mixed to prepare an active material slurry.
The weight ratio of the active material to the binder is not particularly limited, and is preferably as follows: binder 70: 30-90: 10, respectively.
The binder is not particularly limited, and examples thereof include a polyimide resin precursor, a polyamideimide resin precursor, and the like. Among these, polyimide resin precursors are preferable.
The viscosity of the active material slurry is preferably 1 to 10 pas from the viewpoint of coatability. The viscosity of the slurry was measured at 1 to 10rpm using a B-type viscometer.
The viscosity of the active material slurry can be adjusted by adjusting the ratio of the active material to the binder. The viscosity may be adjusted by a thickener or the like as necessary.
(3) Coating process of active material slurry
The collector plate is coated with an active material slurry.
The amount of the active material slurry to be applied is not particularly limited, but is preferably 0.1 to 10mg/cm after heating and drying2。
(4) Pressing process
Next, the collector plate coated with the active material slurry is subjected to press working.
The pressure for the press working is not particularly limited, and is sufficient as long as the active material can be pressed flat.
(5) Heating step
Next, the collector plate coated with the active material slurry is heated to cure the binder included in the active material slurry.
The heating conditions are preferably determined according to the type of the binder used.
When the binder is a polyimide resin precursor, the heating temperature is preferably 250 to 350 ℃. The atmosphere during heating is preferably an inert atmosphere such as a nitrogen atmosphere.
(6) Ultrasonic welding process
Next, the current collecting plate and the lead were connected by ultrasonic welding.
When a part of the collector plate or a part of the lead is melted by heat such as resistance welding to connect the collector plate and the lead, stainless steel forming the collector plate is denatured by heat. When such denaturation occurs, there is a problem that the function of the current collecting plate is reduced.
On the other hand, ultrasonic welding is a method capable of connecting metals to each other without generating heat. Therefore, when ultrasonic welding is used, the current collecting plate and the lead can be connected without being deformed. Therefore, thermal deformation does not occur, the strength of the lead portion is sufficiently enhanced, and the function of the collector plate is not easily degraded.
The time when the current collector plate and the lead are connected by ultrasonic welding may be before the active material is disposed on the current collector plate.
The ultrasonic welding can be performed, for example, by using an ultrasonic welding machine (model 2000Xea 40: 0.8, manufactured by Branson division of Japan) under conditions of an output of 100 to 500W, a welding time of 50 to 500 milliseconds, and a pressure of an ultrasonic horn of 5 to 25 MPa.
Since the preferred structure of the lead has already been described, the description thereof will be omitted.
Next, an electric storage device using the electrode for an electric storage device of the present invention will be described.
An electric storage device using the electrode for an electric storage device of the present invention is also the electric storage device of the present invention.
The power storage device of the invention is composed of
A positive electrode,
A negative electrode,
A separator for separating the positive electrode and the negative electrode,
An electricity storage case housing the positive electrode, the negative electrode, and the separator, and
an electrolyte enclosed in the power storage case,
the positive electrode or the negative electrode may be the electrode for an electric storage device of the present invention.
In the electric storage device of the present invention, the lead of the electrode for an electric storage device of the present invention may be used for connection to other electrodes, or may be used for connection to other electric components.
In the above-described electric storage device of the present invention, the negative electrode is preferably an electrode for an electric storage device of the present invention.
The following describes an electric storage device of the present invention in which the negative electrode is an electrode for an electric storage device of the present invention.
The negative electrode is the electrode for an electric storage device of the present invention.
That is, the negative electrode is an electrode for an electric storage device including a current collecting plate, an electrode portion, and a lead, the current collecting plate including a main body portion and a lead, the electrode portion being disposed on the main body portion of the current collecting plate, the lead being connected to the lead of the current collecting plate, wherein
The lead-out portion and the main body portion are formed of homogeneous stainless steel,
the stainless steel is an austenitic stainless steel including a martensitic structure,
the electrode portion contains silicon as an active material.
In the following description, the current collecting plate and silicon of the electrode for an electric storage device according to the present invention are also referred to as a negative electrode current collecting plate and a negative electrode active material, respectively.
In the electrode for an electric storage device according to the present invention, the positive electrode is preferably composed of a positive electrode current collector plate and a positive electrode active material provided in the positive electrode current collector plate.
The positive electrode current collector plate is not particularly limited, and preferably contains aluminum, nickel, copper, silver, and alloys thereof.
The positive electrode active material is not particularly limited, and examples thereof include: LiMnO2、LixMn2O4(0<x<2)、Li2MnO3、LixMn1.5Ni0.5O4(0<x<2) Lithium manganate having a layered structure or lithium manganate having a spinel structure; LiCoO2、LiNiO2Or those obtained by replacing a part of these transition metals with another metal; LiNi1/3Co1/3Mn1/3O2Lithium transition metal oxides having not more than half of the specific transition metals; substances obtained by adding Li in excess of the stoichiometric composition in these lithium transition metal oxides；LiFePO4And the like having an olivine structure; and so on.
In addition, a material obtained by partially substituting these metal oxides with aluminum, iron, phosphorus, titanium, silicon, lead, tin, indium, bismuth, silver, barium, calcium, mercury, palladium, platinum, tellurium, zirconium, zinc, lanthanum, or the like can also be used. Particularly preferred is LiαNiβCoγAlδO2(1 ≦ α ≦ 2, β + γ + δ ≦ 1, β ≧ 0.7, γ ≦ 0.2) or LiαNiβCoγMnδO2(1≦α≦1.2、β+γ+δ＝1、β≧0.6、γ≦0.2)。
The positive electrode active material may be used alone or in combination of 2 or more.
In the above-described electricity storage device of the present invention, the separator is not particularly limited, and a porous film such as polypropylene or polyethylene, or a nonwoven fabric may be used. Further, as the separator, a member obtained by laminating these may be used. In addition, polyimide, polyamide imide, polyvinylidene fluoride (PVDF), Polytetrafluoroethylene (PTFE), cellulose, and glass fiber, which have high heat resistance, can be used. In addition, a fabric separator in which these fibers are bundled into a thread and woven may also be used.
In the above-described electricity storage device of the present invention, the electrolytic solution is not particularly limited, and a solution obtained by dissolving a metal salt as an electrolyte in a solvent may be used.
Examples of the solvent include cyclic carbonates such as Propylene Carbonate (PC), Ethylene Carbonate (EC), Butylene Carbonate (BC), and Vinylene Carbonate (VC), chain carbonates such as dimethyl carbonate (DMC), diethyl carbonate (DEC), methylethyl carbonate (EMC), and dipropyl carbonate (DPC), aliphatic carboxylic acid esters such as methyl formate, methyl acetate, and ethyl propionate, γ -lactones such as γ -butyrolactone, chain ethers such as 1, 2-Diethoxyethane (DEE) and ethoxymethoxyethane (EME), cyclic ethers such as tetrahydrofuran and 2-methyltetrahydrofuran, dimethyl sulfoxide, 1, 3-dioxolane, formamide, acetamide, dimethylformamide, acetonitrile, propionitrile, nitromethane, ethyl monoglyme, phosphotriester, trimethoxymethane, and dioxolane derivatives, Aprotic organic solvents such as sulfolane, methylsulfolane, 1, 3-dimethyl-2-imidazolidinone, 3-methyl-2-oxazolidinone, propylene carbonate derivatives, tetrahydrofuran derivatives, diethyl ether, 1, 3-propane sultone, anisole, N-methylpyrrolidone, and fluorinated carboxylic acid esters.
These solvents may be used alone or in combination of 2 or more.
The metal salt is not particularly limited, and a lithium salt, a sodium salt, a calcium salt, a magnesium salt, and the like can be used.
When a lithium salt is used as the metal salt, LiPF is an example of the lithium salt6、LiAsF6、LiAlCl4、LiClO4、LiBF4、LiSbF6、LiCF3SO3、LiC4F9CO3、LiC(CF3SO2)2、LiN(CF3SO2)2、LiN(C2F5SO2)2、LiB10Cl10Lower aliphatic carboxylic acid lithium, boron lithium chloride, lithium tetraphenyl borate, LiBr, LiI, LiSCN, LiCl, imide, etc.
These metal salts may be used singly or in combination of 2 or more.
The electrolyte concentration of the electrolyte solution is not particularly limited, but is preferably 0.5 to 1.5 mol/L.
When the electrolyte concentration is less than 0.5mol/L, it is difficult to obtain sufficient conductivity of the electrolyte.
When the electrolyte concentration is more than 1.5mol/L, the density and viscosity of the electrolyte solution tend to increase.
An example of the method for manufacturing an electric storage device according to the present invention in such an embodiment will be described.
First, a negative electrode collector plate on which a negative electrode active material is arranged, a positive electrode collector plate on which a positive electrode active material is arranged, and a separator are prepared.
Then, a separator is interposed between the negative electrode current collecting plate and the positive electrode current collecting plate so that the negative electrode current collecting plate and the positive electrode current collecting plate do not contact each other, and the negative electrode current collecting plate and the positive electrode current collecting plate are laminated to form a laminate. At this time, the extraction portions of the negative electrode current collecting plates are exposed from the laminate.
Next, the lead portion of the negative electrode current collecting plate was connected to the lead by ultrasonic welding. Since the connection is performed by ultrasonic welding, the lead-out portion does not undergo denaturation by heat and has a uniform structure.
The negative electrode current collecting plate is made of austenitic stainless steel having a martensite structure, and the portions connected to the lead can be connected to each other without being denatured by ultrasonic welding.
Further, the positive electrode current collecting plate is also electrically connected to the lead. The method for electrically connecting the positive electrode current collecting plate and the lead is not particularly limited, and the positive electrode current collecting plate and the lead may be connected by resistance welding or ultrasonic welding, for example.
Next, the laminated body is housed in an electricity storage case and an electrolyte solution in which an electrolyte is dissolved is sealed together, whereby an electricity storage device of the present invention can be manufactured.
Next, another embodiment of the power storage device of the present invention will be described.
The power storage device of the invention is composed of
A positive electrode,
A negative electrode,
A separator for separating the positive electrode and the negative electrode,
A metal ion supply electrode for doping the positive electrode and/or the negative electrode with metal ions, a power storage case for housing the positive electrode, the negative electrode, the separator, and the metal ion supply electrode, and an electrolyte enclosed in the power storage case,
the positive electrode, the negative electrode, or the metal ion-supplying electrode may be the electrode for an electric storage device of the present invention described above.
The following description deals with a case where the electrode for an electric storage device of the present invention is used as a metal ion supply electrode.
When the electrode for an electric storage device of the present invention is used as a metal ion supply electrode, it is necessary to dope the electrode for an electric storage device of the present invention with metal ions.
First, a method for doping metal ions into the electrode for an electric storage device of the present invention will be described.
(1) Organic electrolyte coating step
First, an organic electrolytic solution is applied to an electrode portion of a current collecting plate in the electrode for an electric storage device of the present invention.
The organic electrolytic solution is not particularly limited, and a solution obtained by dissolving a metal salt as an electrolyte in an organic solvent can be used.
Examples of the organic solvent include cyclic carbonates such as Propylene Carbonate (PC), Ethylene Carbonate (EC), Butylene Carbonate (BC), and Vinylene Carbonate (VC), linear carbonates such as dimethyl carbonate (DMC), diethyl carbonate (DEC), methylethyl carbonate (EMC), and dipropyl carbonate (DPC), aliphatic carboxylic acid esters such as methyl formate, methyl acetate, and ethyl propionate, γ -lactones such as γ -butyrolactone, linear ethers such as 1, 2-Diethoxyethane (DEE) and ethoxymethoxyethane (EME), cyclic ethers such as tetrahydrofuran and 2-methyltetrahydrofuran, dimethyl sulfoxide, 1, 3-dioxolane, formamide, acetamide, dimethylformamide, acetonitrile, propionitrile, nitromethane, ethyl monoglyme, phosphotriester, trimethoxymethane, and dioxolane derivatives, Aprotic organic solvents such as sulfolane, methylsulfolane, 1, 3-dimethyl-2-imidazolidinone, 3-methyl-2-oxazolidinone, propylene carbonate derivatives, tetrahydrofuran derivatives, diethyl ether, 1, 3-propane sultone, anisole, N-methylpyrrolidone, and fluorinated carboxylic acid esters.
These organic solvents may be used alone or in combination of 2 or more.
When lithium is used as the metal ion source, the organic electrolytic solution preferably has lithium ion conductivity.
(2) Heating step
Next, the electrode portion coated with the organic electrolytic solution is brought into contact with a metal ion source, and the metal ion is doped by heating.
The metal ion source is not particularly limited, and examples thereof include lithium, sodium, magnesium, and calcium. Among these, lithium is preferable.
The heating conditions are not particularly limited, and the heating is preferably carried out at 250 to 300 ℃ for 10 to 120 minutes.
(3) Drying step
The doped electrode for an electric storage device is cleaned with a solvent and then naturally dried, thereby completing doping. As the solvent, DMC (dimethyl carbonate) or the like can be suitably used.
The method of doping is not limited to such a method of contacting with a metal ion source, and other methods may be used. For example, the metal ion source and the electrode for the electric storage device may be connected to an external circuit to perform electric doping.
The electrode for an electric storage device according to the present invention is manufactured by connecting the lead portion of the current collecting plate and the lead by ultrasonic welding, and the doping may be performed before the ultrasonic welding or after the ultrasonic welding.
When the electrode for an electric storage device of the present invention is used as a metal ion supply electrode, the positive electrode in the electric storage device of the present invention preferably has the following configuration.
That is, the positive electrode is preferably composed of a positive electrode collector plate and a positive electrode active material provided in the positive electrode collector plate.
The positive electrode current collector plate is not particularly limited, and preferably contains aluminum, nickel, copper, silver, and alloys thereof.
The positive electrode active material is not particularly limited, and examples thereof include: LiMnO2、LixMn2O4(0<x<2)、Li2MnO3、LixMn1.5Ni0.5O4(0<x<2) Lithium manganate having a layered structure or lithium manganate having a spinel structure; LiCoO2、LiNiO2Or those obtained by replacing a part of these transition metals with another metal; LiNi1/3Co1/3Mn1/3O2Lithium transition metal oxides having not more than half of the specific transition metals; a substance obtained by adding an excess of Li to the stoichiometric composition in these lithium transition metal oxides; LiFePO4And the like having an olivine structure; and so on.
In addition, a material obtained by partially substituting these metal oxides with aluminum, iron, phosphorus, titanium, silicon, lead, tin, indium, bismuth, silver, barium, calcium, mercury, palladium, platinum, tellurium, zirconium, zinc, lanthanum, or the like can also be used. Particularly preferred is LiαNiβCoγAlδO2(1 ≦ α ≦ 2, β + γ + δ ≦ 1, β ≧ 0.7, γ ≦ 0.2) or LiαNiβCoγMnδO2(1≦α≦1.2、β+γ+δ＝1、β≧0.6、γ≦0.2)。
The positive electrode active material may be used alone or in combination of 2 or more.
When the electrode for an electric storage device of the present invention is used as a metal ion supply electrode, the negative electrode in the electric storage device of the present invention preferably has the following configuration.
That is, the negative electrode preferably includes an electrode portion provided in the negative electrode current collector plate and the negative electrode current collector plate, and the electrode portion preferably includes a negative electrode active material.
The negative electrode current collector plate is not particularly limited, and preferably contains aluminum, nickel, copper, silver, an alloy thereof, or the like.
The negative electrode active material is not particularly limited, and preferably contains silicon, silicon monoxide, silicon dioxide, carbon, or the like.
When the electrode for an electric storage device of the present invention is used as a metal ion-supplying electrode, the separator in the electric storage device of the present invention is not particularly limited, and a porous film such as polypropylene or polyethylene, or a nonwoven fabric may be used. Further, as the separator, a member obtained by laminating these may be used. In addition, polyimide, polyamide imide, polyvinylidene fluoride (PVDF), Polytetrafluoroethylene (PTFE), cellulose, and glass fiber, which have high heat resistance, can be used. In addition, a fabric separator in which these fibers are bundled into a thread and woven may also be used.
When the electrode for an electric storage device of the present invention is used as a metal ion supply electrode, the electrolyte solution in the electric storage device of the present invention is not particularly limited, and a solution obtained by dissolving a metal salt as an electrolyte in a solvent may be used.
Examples of the solvent include cyclic carbonates such as Propylene Carbonate (PC), Ethylene Carbonate (EC), Butylene Carbonate (BC), and Vinylene Carbonate (VC), chain carbonates such as dimethyl carbonate (DMC), diethyl carbonate (DEC), methylethyl carbonate (EMC), and dipropyl carbonate (DPC), aliphatic carboxylic acid esters such as methyl formate, methyl acetate, and ethyl propionate, γ -lactones such as γ -butyrolactone, chain ethers such as 1, 2-Diethoxyethane (DEE) and ethoxymethoxyethane (EME), cyclic ethers such as tetrahydrofuran and 2-methyltetrahydrofuran, dimethyl sulfoxide, 1, 3-dioxolane, formamide, acetamide, dimethylformamide, acetonitrile, propionitrile, nitromethane, ethyl monoglyme, phosphotriester, trimethoxymethane, and dioxolane derivatives, Aprotic organic solvents such as sulfolane, methylsulfolane, 1, 3-dimethyl-2-imidazolidinone, 3-methyl-2-oxazolidinone, propylene carbonate derivatives, tetrahydrofuran derivatives, diethyl ether, 1, 3-propane sultone, anisole, N-methylpyrrolidone, and fluorinated carboxylic acid esters.
These solvents may be used alone or in combination of 2 or more.
The metal salt is not particularly limited, and a lithium salt, a sodium salt, a calcium salt, a magnesium salt, and the like can be used.
When a lithium salt is used as the metal salt, LiPF is an example of the lithium salt6、LiAsF6、LiAlCl4、LiClO4、LiBF4、LiSbF6、LiCF3SO3、LiC4F9CO3、LiC(CF3SO2)2、LiN(CF3SO2)2、LiN(C2F5SO2)2、LiB10Cl10Lower aliphatic carboxylic acid lithium, boron lithium chloride, lithium tetraphenyl borate, LiBr, LiI, LiSCN, LiCl, imide, etc.
These metal salts may be used singly or in combination of 2 or more.
The electrolyte concentration of the electrolyte solution is not particularly limited, but is preferably 0.5 to 1.5 mol/L.
When the electrolyte concentration is less than 0.5mol/L, it is difficult to obtain sufficient conductivity of the electrolyte.
When the electrolyte concentration is more than 1.5mol/L, the density and viscosity of the electrolyte solution tend to increase.
An example of the method for manufacturing an electric storage device according to the present invention in such an embodiment will be described.
First, a positive electrode, a negative electrode, and a separator are prepared.
Then, a separator is interposed between the positive electrode and the negative electrode so that the positive electrode and the negative electrode do not contact each other, and the positive electrode and the negative electrode are laminated to form a laminate.
Separately from this, an electrode for an electric storage device of the present invention doped with metal ions, that is, a metal ion supply electrode is separately prepared. The lead-out portion of the metal ion supply electrode and a lead wire made of copper plated with nickel in advance were connected by ultrasonic welding.
Next, the metal ion supply electrode is disposed outside the laminate, and the laminate is stored in an electricity storage case, and an electrolyte solution in which an electrolyte is dissolved is sealed together, whereby the electricity storage device of the present invention can be manufactured.
Further, by connecting the metal ion supply electrode to the positive electrode or the negative electrode by an external circuit, metal ions necessary for charge and discharge can be supplied to the positive electrode or the negative electrode.
Industrial applicability
The electrode for an electric storage device of the present invention can be suitably used as a positive electrode, a negative electrode, or a metal ion-supplying electrode for doping metal ions of an electric storage device.
Description of the symbols
10 electrode for electricity storage device
20 collector plate
21 lead-out part
22 main body part
26 martensite structure
27 austenitic structure
30 electrode part
40 lead wire

Claims (9)

1. An electrode for an electric storage device, comprising a collector plate, an electrode portion, and a lead, wherein the collector plate comprises a main body portion and a lead portion, the electrode portion is disposed on the main body portion of the collector plate, and the lead is connected to the lead portion of the collector plate,
the lead-out portion and the main body portion are formed of homogenous stainless steel,
the stainless steel is an austenitic stainless steel including a martensitic structure,
the electrode portion contains silicon as an active material.
2. The electrode for an electric storage device according to claim 1, wherein in a cross section of the collector plate cut in a thickness direction, a martensite structure is dispersed in an austenite structure in an island shape.
3. The electrode for an electric storage device according to claim 1 or 2, wherein the lead has a lower elastic modulus than the collector plate.
4. The electrode for an electric storage device according to any one of claims 1 to 3, wherein the lead wire contains at least one selected from the group consisting of nickel, copper, aluminum, and brass.
5. The electrode for an electricity storage device according to any one of claims 1 to 4, wherein the lead wire is plated with at least one selected from the group consisting of nickel, gold, silver, zinc, and chromium.
6. The electrode for an electricity storage device according to any one of claims 1 to 5, wherein the active material contains only silicon.
7. The electrode for an electric storage device according to any one of claims 1 to 6, wherein the electrode for an electric storage device is a metal ion supply electrode that supplies metal ions to an electrolyte.
8. An electric storage device comprising the electrode for an electric storage device according to any one of claims 1 to 7.
9. A method for manufacturing an electrode for an electric storage device, the electrode comprising a collector plate, an electrode portion, and a lead, the collector plate comprising a main body portion and a lead portion, the electrode portion being disposed on the main body portion of the collector plate, the lead being connected to the lead portion of the collector plate,
the manufacturing method includes an ultrasonic connecting step of connecting the lead-out portion and the lead by ultrasonic welding,
the collector plate is formed of austenitic stainless steel including a martensitic structure,
the electrode portion contains silicon as an active material.
CN201880061165.6A 2017-10-05 2018-09-14 Electrode for electric storage device, and method for manufacturing electrode for electric storage device Active CN111133612B (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2017-195156 2017-10-05
JP2017195156A JP6982454B2 (en) 2017-10-05 2017-10-05 A method for manufacturing an electrode for a power storage device, a power storage device, and an electrode for a power storage device.
PCT/JP2018/034196 WO2019069664A1 (en) 2017-10-05 2018-09-14 Storage device electrode, storage device and manufacturing method of storage device electrode

Publications (2)

Publication Number Publication Date
CN111133612A true CN111133612A (en) 2020-05-08
CN111133612B CN111133612B (en) 2023-05-09

Family

ID=65994894

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201880061165.6A Active CN111133612B (en) 2017-10-05 2018-09-14 Electrode for electric storage device, and method for manufacturing electrode for electric storage device

Country Status (3)

Country Link
JP (1) JP6982454B2 (en)
CN (1) CN111133612B (en)
WO (1) WO2019069664A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102449028B1 (en) * 2022-05-31 2022-09-29 에이에프더블류 주식회사 Method for manufacturing fusing lead tab and fusing lead tab manufactured thereby

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05255814A (en) * 1992-03-13 1993-10-05 Nippon Steel Corp Stainless steel thin sheet excellent in damping capacity and its manufacture
JP2008108741A (en) * 2007-12-07 2008-05-08 Ube Ind Ltd Nonaqueous secondary battery
JP2009221553A (en) * 2008-03-17 2009-10-01 Nisshin Steel Co Ltd Stainless steel for low nickel springs excellent in settling resistance and bendability
JP2013101919A (en) * 2011-10-14 2013-05-23 National Institute Of Advanced Industrial & Technology Collector material for power storage device and production method therefor, electrode for power storage device, and power storage device
JP2014212029A (en) * 2013-04-18 2014-11-13 Jsr株式会社 Electrode for electricity storage device and electricity storage device
US20150309458A1 (en) * 2014-04-28 2015-10-29 Canon Kabushiki Kaisha Metal substrate, fixing member, and heat-fixing device
WO2017104028A1 (en) * 2015-12-16 2017-06-22 株式会社 東芝 Non-aqueous electrolyte cell and cell pack

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5054419B2 (en) * 2006-07-06 2012-10-24 エナックス株式会社 Sheet-like secondary battery
JP5602113B2 (en) * 2011-08-31 2014-10-08 日新製鋼株式会社 Copper-coated steel foil assembly and current-carrying member
JP2017091899A (en) * 2015-11-13 2017-05-25 日立オートモティブシステムズ株式会社 Lithium ion secondary battery

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05255814A (en) * 1992-03-13 1993-10-05 Nippon Steel Corp Stainless steel thin sheet excellent in damping capacity and its manufacture
JP2008108741A (en) * 2007-12-07 2008-05-08 Ube Ind Ltd Nonaqueous secondary battery
JP2009221553A (en) * 2008-03-17 2009-10-01 Nisshin Steel Co Ltd Stainless steel for low nickel springs excellent in settling resistance and bendability
JP2013101919A (en) * 2011-10-14 2013-05-23 National Institute Of Advanced Industrial & Technology Collector material for power storage device and production method therefor, electrode for power storage device, and power storage device
JP2014212029A (en) * 2013-04-18 2014-11-13 Jsr株式会社 Electrode for electricity storage device and electricity storage device
US20150309458A1 (en) * 2014-04-28 2015-10-29 Canon Kabushiki Kaisha Metal substrate, fixing member, and heat-fixing device
WO2017104028A1 (en) * 2015-12-16 2017-06-22 株式会社 東芝 Non-aqueous electrolyte cell and cell pack

Also Published As

Publication number Publication date
JP2019067730A (en) 2019-04-25
JP6982454B2 (en) 2021-12-17
CN111133612B (en) 2023-05-09
WO2019069664A1 (en) 2019-04-11

Similar Documents

Publication Publication Date Title
US7998620B2 (en) Positive electrode active material for non-aqueous electrolyte secondary battery and method for producing the same, and non-aqueous electrolyte secondary battery using positive electrode active material
WO2017047280A1 (en) Lithium secondary battery and method for producing same
CN111108634B (en) Electrode for electricity storage device and electricity storage device
JP6112111B2 (en) Lithium ion secondary battery manufacturing method and lithium ion secondary battery
JP5512057B2 (en) Cylindrical battery
US9559362B2 (en) Nonaqueous electrolyte secondary battery and method for manufacturing the same
JP6744216B2 (en) Method for manufacturing negative electrode of lithium-ion battery, and method for manufacturing lithium-ion battery
CN111133612B (en) Electrode for electric storage device, and method for manufacturing electrode for electric storage device
CN111108635B (en) Electrode for electric storage device, and method for manufacturing electrode for electric storage device
JP6768398B2 (en) Electrodes for power storage devices, power storage devices, air batteries and all-solid-state batteries
CN109565055B (en) Electrode for electricity storage device, air cell, and all-solid-state cell
JP7332418B2 (en) Lithium ion secondary battery, method for manufacturing lithium ion secondary battery, and method for recovering capacity of lithium ion secondary battery
JPWO2013183524A1 (en) Nonaqueous electrolyte secondary battery
JP6128228B2 (en) Negative electrode active material, negative electrode using the same, and lithium ion secondary battery
JP2019160724A (en) Negative electrode and lithium ion secondary battery
JP2024040732A (en) Cured products for lithium ion secondary batteries, negative electrodes for lithium ion secondary batteries, and lithium ion secondary batteries
CN115411227A (en) Lithium ion secondary battery
JPWO2011070710A1 (en) Nonaqueous electrolyte secondary battery

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant