CN104241654B - Current collector, manufacturing method of current collector, electrode and secondary battery - Google Patents
Current collector, manufacturing method of current collector, electrode and secondary battery Download PDFInfo
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- CN104241654B CN104241654B CN201410219393.5A CN201410219393A CN104241654B CN 104241654 B CN104241654 B CN 104241654B CN 201410219393 A CN201410219393 A CN 201410219393A CN 104241654 B CN104241654 B CN 104241654B
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- collector
- electrode
- carbon powder
- conductive materials
- base material
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- 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
- H01M4/661—Metal or alloys, e.g. alloy coatings
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- 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
- H01M4/0402—Methods of deposition of the material
- H01M4/0404—Methods of deposition of the material by coating on electrode collectors
-
- 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
- H01M4/663—Selection of materials containing carbon or carbonaceous materials as conductive part, e.g. graphite, carbon fibres
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- 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 a current collector, a manufacturing method of the current collector, an electrode with the current collector, and a secondary battery which uses the electrode and can reduce an inner resistance. When the current collector is used as the electrode of the secondary battery, contact resistance with an active material layer can be furthermore reduced. The current collector is characterized in that: the current collector (1) comprises a substrate (1a) comprising a metal foil, and a conductive matter (1b) which is arranged on the surface of at least one side of the substrate (1a); the conductive matter (1b) comprises carbon powder; and according to the carbon powder, pH value of a suspension which is obtained through dispensing 1.00wt% of the carbon powder in distilled water is 7.1-9.5.
Description
Technical field
The present invention relates to be used for the collector and its manufacture method of the electrode of secondary cell, the electrode using the collector and
Using the secondary cell of the electrode.
Background technology
For being coated with carbon series conductive material in the metal forming such as aluminium foil, the Copper Foil of base material as electrode for secondary battery
Collector research, carry out in various research institutions up to now.In addition, also completing many patent applications, for example may be used
To enumerate 1～patent documentation of patent documentation 4.
Following collector is recorded in patent documentation 1 and patent documentation 2, i.e., on the surface of the base materials such as aluminium foil, Copper Foil
It is formed with comprising the carbon particulate (conductive materials) and the envelope of envelope formation compound as conductive materials.In addition, in patent
The current collection that the conductive layer comprising carbon powder (conductive materials) and binding agent is provided between active substance has been recorded in document 3
Body.In addition, recorded in patent documentation 4 being provided with the collector of the conductive coating paint layer using carbon as conductive agent on surface.
These are to reduce the contact resistance between collector and the active material layer that is formed thereon, and realize that the high speed for improving battery is filled
Flash-over characteristic, the technology of cycle characteristics.
Prior art literature
Patent documentation
Patent documentation 1：Japanese Unexamined Patent Publication 2007-226969 publications
Patent documentation 2：Japanese Unexamined Patent Publication 2010-135338 publications
Patent documentation 3：Japanese Unexamined Patent Publication 9-97625 publication
Patent documentation 4：Japanese Unexamined Patent Publication 2001-351612 publications
The content of the invention
Invent problem to be solved
Consequently, it is possible to the reduction of the contact resistance between collector and active material layer can be realized in existing technology.
But in recent years, due to improve the high speed charge-discharge characteristic of battery, cycle characteristics requirement it is further growing etc., therefore
Require the further reduction of the contact resistance between collector and active material layer.
Therefore, problem of the invention is to provide and can further be reduced and activity when the electrode as secondary cell is used
The collector of the contact resistance of material layer, the manufacture method of the collector, the electrode using the collector and using there is the electrode
The secondary cell that can reduce internal resistance.
Method for solving problem
In order to solve described problem, the collector of the present invention is that possess the base material comprising metal forming and be arranged at the base material
At least side surface conductive materials collector, it is constituted as follows, i.e., above-mentioned conductive materials contain carbon powder,
For above-mentioned carbon powder, the pH of suspension when the above-mentioned carbon powder of 1.00 mass % is dispersed with distilled water is 7.1
～9.5.
According to this composition, collector becomes the carbon powder of the suspension by using the pH as regulation, suitably removes shape
The autoxidation envelope on the surface of base materials of the Cheng Yu comprising metal forming.Therefore when the electrode as secondary cell is used, current collection is made
Contact resistance low resistance between body and active material layer.
The manufacture method of the collector of the present invention is the manufacture method of collector described above, it is characterised in that successively
The painting process of the surface coating containing carbon powder and the slurry of binding agent of at least side of the base material comprising metal forming is included in,
With the drying process of the slurry after the above-mentioned coating of drying, use as above-mentioned carbon powder and 1.00 mass % are dispersed with distilled water
Above-mentioned carbon powder when suspension pH be 7.1～9.5 carbon powder.
According to the order, by using the carbon powder of the suspension of the pH for becoming regulation, the evaporation in drying process is molten
During agent, the pH for being attached to the slurry comprising conductive materials on the surface of base material rises, and can suitably remove and be formed at base
The autoxidation envelope on the surface of material.Therefore, using the collector of manufacture as the electrode of secondary cell use when, collector and work
Contact resistance between property material layer is able to low resistance.
The electrode of the present invention is the electrode using the secondary cell for having collector described above, in above-mentioned collector
The surface for being provided with above-mentioned conductive materials arranges active material layer and constitutes.
According to this composition, electrode uses collector described above, thus using the surface conductance material for being arranged at base material,
Contact resistance between collector and active material layer is able to low resistance.
The present invention secondary cell be the secondary cell with anelectrode and negative electrode, used in above-mentioned anelectrode this
Bright electrode and constitute.
According to this composition, the electrode of secondary cell makes the contact resistance low resistance between collector and active material layer,
Therefore as secondary cell, its internal resistance is able to low resistance.
Invention effect
Collector of the invention, suitably removed by using the carbon powder of regulation the surface that is formed at base material from
Right oxide film thereon, therefore when using as the collector of secondary cell, connecing between collector and active material layer can be reduced
Get an electric shock and hinder.Accordingly, it is capable to access the effect that contact resistance is substantially reduced.
The manufacture method of collector of the invention, can obtain the natural oxygen on the appropriate surface for removing and being formed at base material
Change the collector of envelope.Therefore, using the collector of manufacture as the electrode of secondary cell use when, collector and active material layer
Between contact resistance be minimized.
Electrode of the invention, can reduce the contact resistance between collector and active material layer.Therefore, it is possible to
To the effect that contact resistance is substantially reduced.
In addition, secondary cell of the invention, can reduce the internal resistance of battery.
Description of the drawings
Fig. 1 is the schematic section for illustrating the structure of the collector of the present invention.
Fig. 2 is the schematic section for illustrating the structure of the electrode using the collector for having the present invention.
Fig. 3 is the schematic section for illustrating the structure of the secondary cell using the electrode for having the present invention.
Fig. 4 is the flow chart of the flow process of the manufacture method of the collector for representing the present invention.
Specific embodiment
Below, the embodiment of the collector of the present invention is described in detail.
[structure of collector]
For the structure of present embodiment collector, illustrate with reference to Fig. 1.
In FIG in shown example, the collector 1 of present embodiment possesses the base material 1a comprising metal forming and is arranged at
Conductive materials (conductive layer) 1b on the surface of base material 1a.In addition, conductive materials 1b is configured at the two sides of base material 1a.Need
Bright, the state that conductive materials 1b can be condensed by island is configured at the surface of base material 1a, it is also possible to similarly by film like
Configuration.In addition, conductive materials 1b can also be configured in the way of the one side of base material 1a is configured at.That is conductive materials 1b is configured at base
The surface of at least side of material 1a.
Also, for collector 1, conductive materials 1b contains carbon powder.Following carbon powder is used as the carbon powder,
The pH of the suspension when carbon powder of 1.00 mass % is dispersed with distilled water is 7.1～9.5.
The collector 1 of present embodiment can function properly as the collector of the anelectrode of such as lithium rechargeable battery.
For collector 1, the appropriate autoxidation envelope for removing the surface for being formed at the base material comprising metal forming, therefore as secondary
When the electrode of battery is used, the contact resistance between collector and active material layer is able to low resistance.
For being described in detail below using the electrode for having collector 1.
Then, each element is illustrated.
(base material)
Base material 1a can use aluminum (A1), aluminium alloy for using usually as the collector 1 of electrode for secondary battery etc..Make
When using for the collector 1 of electrode for secondary battery, base material 1a is generally used with the foil-like that thickness is 5～50 μm or so.
(conductive materials)
Conductive materials 1b is following material, with the surface that island or film like are formed at base material 1a, is reduced and base material 1a
Contact resistance between the collector 1 for together constituting with and active material layer 2 (Fig. 2 references).
Conductive materials 1b contains the carbon powder as conductive materials.Here, " conductive materials contain carbon powder " is referred to except work
Beyond for the carbon powder of conductive materials, it is also possible to comprising other materials.That is, conductive materials 1b is powdered carbon except original conductive materials
Beyond end, also comprising to improve the resin (binding agent) of adaptation as target etc., base is fixed in the way of their mixture
The surface of material 1a.
The carbon powder included in conductive materials 1b as described above, using being dispersed with 1.00 mass % in distilled water
The pH of the suspension during carbon powder is 7.1～9.5 carbon powder.
By using the carbon powder of above-mentioned composition, in drying process described later, coat Al paper tinsels surface comprising conduction
The pH of the slurry of material rises with being dried, therefore, it is possible to effectively remove the autoxidation envelope for being formed at Al paper tinsels surface.
Therefore, collector 1 eliminates the autoxidation envelope on base material 1a surfaces.
If pH is less than 7.1, autoxidation envelope is not operatively removed, when using as the electrode of secondary cell, it is impossible to
Realize the low resistance of the contact resistance between collector 1 and active material layer 2.On the other hand, it is difficult to make very strong alkali
Property carbon, therefore the upper limit be 9.5.It is preferred that less than 9.0.
The carbon powder that the pH of suspension is 7.1～9.5 is used accordingly, as carbon powder.It is preferred that pH is 7.5～9.0, it is more excellent
Select 8.0～9.0, particularly preferred 8.8～9.0.
For the pH of carbon powder is determined, can be implemented by following method as one.Carbon powder 1g is weighed, is utilized
Agate mortar adds the distilled water of pH=7.0 in mixing by amount, makes the suspension that 1.00 mass % are dispersed with carbon powder.System
Make suspension after stirring, standing 24 hours, using commercially available pH meter pH is determined.
Carbon powder is preferably referred to as the charcoal micropowder of white carbon black.
As the white carbon black included in conductive materials 1b, as long as the pH when disperseing in water is in above-mentioned prescribed limit, and can
With using comprising furnace black, acetylene black, Ketjen black, lampblack etc., the various white carbon blacks made using various methods.In addition, at for pH
White carbon black beyond the scope of above-mentioned regulation, by carrying out the methods such as corona treatment in a vacuum, by assigning on its surface
Hydroxyl is given to adjust to above-mentioned prescribed limit pH and also can use.
(electrode)
Next, illustrating to the composition of the electrode of the present invention.The electrode of the present invention is using the collection for having above-mentioned record
The electrode for secondary battery of electric body, on the surface for being provided with conductive materials of collector the electrode of active material layer is arranged.
With reference to Fig. 2, the composition of the electrode of the lithium rechargeable battery of the collector 1 using present embodiment is said
It is bright.
Collector 1 shown in the Fig. 1 of electrode 10 by present embodiment as shown in Figure 2 and it is laminated in the table of collector 1
The active material layer 2 in face (two sides) is constituted.Can be using metals such as Al, Al alloys as collector 1 (base material 1a).In addition, making
For positive active material, it is possible to use known material, such as LiCoO2、LiNiO2、LiMn2O4Etc. lithium-containing oxides.Positive pole
Also there is no particular limitation for the manufacture method of active material layer 2, it is possible to use known method, for example, to the above-mentioned of powder
Add in lithium-containing oxides except binding agent, can also be added as needed on coating collection after the fully mixing such as conductive agent, solvent
Electric body 1 and be dried, punching press and manufacture.It should be noted that active material layer 2 can also be by being provided with conductive materials
The mode of the one side of 1b is laminated.
(secondary cell)
Next, illustrating to the composition of the secondary cell of the present invention.The secondary cell of the present invention is with anelectrode
With the battery of negative electrode, the electrode of the extremely above-mentioned record of above-mentioned positive electricity.
With reference to Fig. 3 (appropriate with reference to Fig. 2), to employ the lithium using the electrode 10 of the collector 1 for having present embodiment from
The composition of sub- secondary cell is illustrated.
Lithium rechargeable battery (secondary cell) 20 as shown in Figure 3 is comprising using the collector 1 for having present embodiment
Electrode 10 be anelectrode 11, negative electrode 12, distance piece 13 and electrolyte 14 and constitute.Anelectrode 11 and negative electrode 12 are by interval
Part 13 is filled with electrolyte 14 separating, between anelectrode 11, negative electrode 12 and distance piece 13.In addition, lithium rechargeable battery
20 entirety is accommodated in container (not shown), and anelectrode 11 and negative electrode 12 are soldered respectively metal joint and (do not scheme
Show), electrically connect with electrode terminal (not shown).
For anelectrode 11, it is formed with the surface of the collector 1 of present embodiment above-mentioned comprising positive electrode active material
The active material layer 2 of matter.In addition, for negative electrode 12, on the surface of the known collector being for example made up of copper etc., being formed
There is the active material layer comprising negative electrode active material known to graphite etc..
In addition, distance piece 13 and electrolyte 14 can be constituted respectively using known material.As distance piece 13, for example
The polyethylene-based microporous membrane of 20～30 μm of thickness can be used.In addition, as electrolyte 14, such as can use in polypropylene carbonate
LiPF is dissolved with the organic solvents such as ester, ethylene carbonate6、LiBF4Deng the non-aqueous electrolyte of electrolyte.
Next, with reference to Fig. 4 (appropriate with reference to Fig. 1), illustrating to the manufacture method of the collector 1 of present embodiment.
[manufacture method]
As shown in Figure 4, the manufacture method of the collector 1 of present embodiment is successively comprising painting process S1 and back tender
Sequence S2.
Collector 1 can be manufactured by the following method, that is, the surface coating for being included in the base material 1a comprising metal forming contains
The manufacture method of the painting process S1 of the solution (slurry) of the conductive materials 1b and drying process S2 for being dried solution.
(painting process)
First, painting process S1 is illustrated.
Painting process S1 is that the surface coating at least side of the base material 1a comprising metal forming contains carbon powder and bonding
The operation of the slurry of agent.
Slurry is prepared by adding and mixing the material of carbon powder, binding agent and other needs in solvent.Slurry
Preparation is carried out using known method.
Conductive materials 1b can be island in the surface configuration of base material 1a, it is also possible to be configured to film like.For making conduction
Material 1b cohesions are the structure of island, and it is effective that the concentration of the conductive materials 1b in the solution of base material 1a is coated in regulation.This
It is due to the viscosity B coefficent of the solution if the concentration of conductive materials 1b is adjusted, therefore coating and dried conductive materials 1b
Distribution produce change.
Following carbon powder is used as the carbon powder as conductive materials 1b, i.e., disperses 1.00 mass % in distilled water
Carbon powder when suspension pH be 7.1～9.5.This is because：By using the carbon powder of the scope, in drying described later
During evaporation solvent in operation, the pH for being attached to the slurry of the conductive materials on the surface of base material 1a rises, and can
Removing is formed at the autoxidation envelope on the surface of base material 1a.
As binding agent, thickening agent, fluorine resin for being usually used etc. can be adopted, such as it is carboxymethyl cellulose, poly- inclined
The various resins such as difluoroethylene, styrene butadiene ribber, polypropylene.
Water solvent can be used as the solvent of solution (slurry).Water, distilled water etc. can be enumerated as water solvent.
For the solution comprising conductive materials 1b is in the coating on the surface of base material 1a, the utilization rod being usually used can be adopted
The coating process of the various coating machines such as formula coating machine, roll coater, gravure coater, dip coaterd, flush coater.Need explanation
It is that conductive materials 1b coats the two sides of base material 1a or one side.
(drying process)
Next, illustrating to drying process S2.
Drying process S2 is the operation of the slurry drying for making to be coated with painting process S1.That is, drying process S2 be for
The operation of solvent evaporation and diffusion is made after painting process S1.Drying process S2 can be carried out in the way of using drying at room temperature,
Can carry out in the way of being thermally dried using heat-treatment furnace etc. as needed.
Dry time, temperature etc. are without special regulation, as long as make solvent evaporation and diffusion and to the current collection of the present invention
The condition that function of body 1 etc. does not have a negative impact.It should be noted that when being thermally dried, heating-up temperature is preferred
Solvent easily evaporates (lower limit reason) and does not reduce 100～170 DEG C of the temperature of metal forming intensity (upper limit reason).
By drying process S2, during evaporation solvent, be attached to base material surface comprising conductive materials
The pH of slurry rises, and the autoxidation envelope for being formed at the surface of base material is removed.It is hereby achieved that the collector of the present invention.
More than, the manufacture method of collector of the present invention is illustrated, when carrying out the present invention, above-mentioned each operation it
Between or in front and back can contain above-mentioned operation beyond operation.For example, it is also possible to include and preparing the slurry preparation section of slurry, removing
Go other operations such as the debris removal step of the debris such as waste.
Embodiment
Next, the collector to present embodiment, compares the embodiment of the important document for meeting the present invention and is originally unsatisfactory for sending out
The comparative example of bright important document is illustrated.
Sample is made by following method.
(base material)
As base material, using the Al paper tinsels of 15 μm of the thickness of the 1000 Al alloys for being.
(conductive materials)
As conductive materials, using the white carbon black (furnace black) made by making oily imperfect combustion in stove and by by second
The white carbon black (acetylene black) that alkynes gas is thermally decomposed and made.
(pH measure)
The pH of white carbon black is determined and implemented using following method.Each hydrocarbon black powder 1g is weighed, is mixed using agate mortar side
While adding the distilled water of pH=7.0 by amount, making white carbon black is the scattered suspension of 1.00 mass %.Make suspension stirring,
After standing 24 hours, make manufactured pH meter using hole field and determine pH.
(painting process)
In painting process, using water as the solvent of the solution comprising conductive materials, added with the concentration of 1 mass %
CMC (carboxymethyl celluloses；Wako Pure Chemical Industries, Ltd. manufactures) resin.In addition, the coating of solution uses rod coater
(number No.5) is carried out.
(drying process)
Using the solution coating containing conductive materials behind the surface (simultaneously) of the Al paper tinsels as base material, by base material at 120 DEG C
Drying oven in keep and be dried.
<Evaluation methodology>
(evaluation of the internal resistance of battery)
The battery unit that the Al paper tinsels that conductive materials are formed with surface are used as collector will be made by above-mentioned method,
By determining the effect that its flash-over characteristic evaluates the low resistance of contact resistance.
Active material layer is formed being formed with the sample of conductive materials (carbon), lithium rechargeable battery positive electricity is made
Pole.Here, for active material layer is by the following active material layer for forming about 25 μm of thickness, will be used as active substance
LiCoO2, the acetylene black as conductive agent, NMP (the N- methyl pyrroles of the PVdF as binding agent (polyvinylidene fluoride) and solvent
Pyrrolidone) material of slurry made by the ratio mixing of regulation coats the face of the conductive materials for being formed with sample so as to
It is dried in 120 DEG C of air.
By preparing identical method with above-mentioned sample, it is coated with using graphite as activity on the Cu paper tinsels of about 15 μm of thickness
The slurry of material is simultaneously dried, and makes lithium rechargeable battery negative electrode, by combining with above-mentioned anelectrode, makes electricity
The internal resistance measure battery unit in pond.It should be noted that negative electrode be active substance is directly set on Cu paper tinsels and not
The electrode of conductive materials is set.
For the battery unit for making, after the regulation for being specified (adjustment) charge and discharge electric treatment, the charging from 4.2V is determined
State starts, discharge curve when being discharged under each electric current for changing discharge-rate (C multiplying powers).Also, by 0.2C (by electricity
The electric current that all told in pond was discharged with 5 hours) electric discharge when discharge capacity C0.2(all told of battery is with 6 with 10C
The electric current that discharged of minute) electric discharge when discharge capacity C10 ratio, be calculated as follows discharge capacity rate R.
R=C10/C0.2× 100 (%)
The evaluation result of the manufacturing conditions, evaluating characteristics result and quality of the displayed in Table 1 sample for making collects.
It should be noted that in table 1, discharge capacity rate R when 10C discharges when discharging relative to 0.2C is more than 30%, high current
The obvious sample of flash-over characteristic improvement during electric discharge is used as qualified (zero).On the other hand, put relative to 0.2C when 10C discharges
Sample of discharge capacity rate R when electric less than 30% is used as unqualified (△).
【Table 1】
In table 1, No.1～3 use white carbon blacks of the pH less than 7.1, therefore do not remove the autoxidation envelope of substrate surface,
Contact resistance can not be reduced, because this discharge capacity rate is less than 30%.
On the other hand, the pH of the white carbon black that No.4～7 use within the scope of the invention, therefore can be removed in drying process
The autoxidation envelope of substrate surface is removed, discharge capacity rate is more than 30%, can confirm that the improvement of flash-over characteristic.
More than, embodiments of the present invention and the embodiment for showing are explained, but the purport of the present invention
Above-mentioned content is not limited to, its interest field must be construed broadly according to the record of required scope.Need explanation
, it is self-evident that present disclosure can carry out modification, the change of broad sense etc. according to above-mentioned record.
Symbol description
1 collector
1a base materials
1b conductive layers (conductive materials)
2 active material layers
10 electrodes
11 anelectrodes (electrode)
12 negative electrodes
13 distance pieces
14 electrolyte
20 lithium rechargeable batteries (secondary cell).
Claims (4)
1. a kind of collector, it is characterised in that
The collector possesses the base material comprising metal forming and is arranged at the conductive materials on the surface of at least side of the base material,
The conductive materials contain carbon powder,
For the carbon powder, the pH of the suspension when carbon powder of 1.00 mass % is dispersed with distilled water is
7.1～9.5,
Wherein, the conductive materials are arranged at least side of described matrix by the method that slurry is coated, and in back tender
During evaporation solvent in sequence, the pH for being attached to the slurry of the conductive materials of the substrate surface rises.
2. a kind of manufacture method of collector, is the manufacture method of the collector described in claim 1, it is characterised in that
Methods described includes successively：
Painting process：In the slurry of the surface coating containing carbon powder and binding agent of at least side of the base material comprising metal forming,
With
Drying process：The slurry drying after the coating is made, is attached on the pH of the slurry of the conductive materials of the substrate surface
Rise,
The pH of the suspension when carbon powder that 1.00 mass % are dispersed with distilled water is used as the carbon powder is
7.1～9.5 carbon powder.
3. a kind of electrode, it is characterised in that the electrode of the secondary cell of the collector being the use of described in claim 1,
The surface for being provided with the conductive materials of the collector is provided with active material layer.
4. a kind of secondary cell, it is characterised in that
It is the secondary cell with anelectrode and negative electrode, the electrode described in the positive electricity extremely claim 3.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2013-123906 | 2013-06-12 | ||
| JP2013123906A JP2014241259A (en) | 2013-06-12 | 2013-06-12 | Current collector, method for manufacturing current collector, electrode, and secondary battery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104241654A CN104241654A (en) | 2014-12-24 |
| CN104241654B true CN104241654B (en) | 2017-04-12 |
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|---|---|---|---|
| CN201410219393.5A Active CN104241654B (en) | 2013-06-12 | 2014-05-22 | Current collector, manufacturing method of current collector, electrode and secondary battery |
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| Country | Link |
|---|---|
| JP (1) | JP2014241259A (en) |
| CN (1) | CN104241654B (en) |
| TW (1) | TWI518977B (en) |
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| CN108649185A (en) * | 2018-04-25 | 2018-10-12 | 苏州宇量电池有限公司 | A kind of solid-state preparation method, pole piece and the lithium ion battery of electrodes of lithium-ion batteries |
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| JP5688639B2 (en) * | 2010-12-24 | 2015-03-25 | 日本パーカライジング株式会社 | Etching agent for aluminum alloy |
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| CN102203993A (en) * | 2008-11-13 | 2011-09-28 | 丰田自动车株式会社 | Positive current collector and manufacturing method thereof |
| CN102208598A (en) * | 2011-05-12 | 2011-10-05 | 中国科学院宁波材料技术与工程研究所 | Electrode plate of graphene coating modified lithium secondary battery and manufacturing method thereof |
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| JP2014241259A (en) | 2014-12-25 |
| TWI518977B (en) | 2016-01-21 |
| CN104241654A (en) | 2014-12-24 |
| TW201503478A (en) | 2015-01-16 |
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