CN105322178B - Electrochemical battery electrode, electrochemical battery containing same and preparation method thereof - Google Patents
Electrochemical battery electrode, electrochemical battery containing same and preparation method thereof Download PDFInfo
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- CN105322178B CN105322178B CN201510676246.5A CN201510676246A CN105322178B CN 105322178 B CN105322178 B CN 105322178B CN 201510676246 A CN201510676246 A CN 201510676246A CN 105322178 B CN105322178 B CN 105322178B
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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
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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
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
- H01M4/139—Processes of manufacture
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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
- H01M4/36—Selection of substances as active materials, active masses, active liquids
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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
- H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
- H01M4/621—Binders
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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
- H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
- H01M4/624—Electric conductive fillers
- H01M4/625—Carbon or graphite
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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 belongs to the field of graphene preparation, and particularly relates to an electrochemical battery pole piece which comprises a current collector and an active substance layer, wherein a buffer layer is arranged between the current collector and the active substance layer, and the thickness of the buffer layer is 0.336 nm-4 mu m; the buffer layer contains adhesive and conductive agent, the conductive agent includes graphite alkene, the lamella plane of graphite alkene with the contained angle between the plane of mass flow body is theta, and theta < 45% graphite alkene's quality accounts for the proportion of graphite alkene total amount more than or equal to 50%. At this time, the graphene tends to be arranged parallel to the current collector, and occupies a smaller thickness, so that the buffer layer of the inactive material component has a smaller thickness, and the battery has a higher energy density.
Description
Technical Field
The invention belongs to the field of electrochemical cells, and particularly relates to an electrochemical cell electrode, an electrochemical cell containing the electrode and a preparation method of the electrochemical cell.
Background
After the 21 st century, various electronic device products such as mobile phones, notebooks, wearable devices and the like are in endless, and the lives of a large number of users are greatly enriched; meanwhile, electric vehicles and various energy storage power stations also sprout, develop and grow rapidly like spring bamboo shoots after rain. The above high-tech products have one common feature: high performance, low cost batteries are required to serve as energy storage components.
The existing batteries mainly comprise a primary battery and a secondary battery; the so-called primary battery, which is a battery that cannot be repeatedly charged, mainly includes a carbon zinc battery, an alkaline battery, a paste zinc-manganese battery, a cardboard zinc-manganese battery, an alkaline zinc-manganese battery, a button cell (a button zinc-silver battery, a button lithium-manganese battery, a button zinc-manganese battery), a zinc-air battery, a primary lithium-manganese battery, and the like, and a mercury battery; the secondary battery, i.e., a rechargeable battery, mainly includes a secondary alkaline zinc-manganese battery, a nickel-cadmium rechargeable battery, a nickel-hydrogen rechargeable battery, a lithium rechargeable battery, a lead-acid battery, and a solar battery. Lead-acid batteries can be divided into: open type lead-acid storage battery and totally-enclosed lead-acid storage battery. From the perspective of external packaging, the conventional batteries are mainly classified into flexible-packaged batteries and hard-shell-packaged batteries, and the flexible-packaged battery packaging film has small thickness and large plasticity, so that the battery is widely applied to various high-grade primary batteries and secondary batteries.
However, with the improvement of the taste of life, people put forward higher experience demands on mobile electric appliances: lighter, thinner, smaller, longer lasting, and safer experiences are representative aspects of these experiences, and safer, longer lasting, and one of the most important experiences, which places higher safety and energy density demands on the electrical storage device (battery); the electrode plate with lower impedance and the electrode material with higher energy density are effective methods for solving the safety performance of the battery cell and improving the energy density of the battery cell.
For the existing electrode material, the higher the energy density is, the larger the charge-discharge volume expansion rate is, so the higher the probability of the electrode coating of the finished product battery cell falling off in the charge-discharge process is, and the cycle performance of the battery is deteriorated. Meanwhile, in order to ensure that the overall capacity density of the battery is high, the proportion and the thickness of inactive substance components in the battery must be compressed to the minimum; and the thickness direction of the Graphene (Graphene) sheet material is the thinnest of the existing material.
In view of the above, it is necessary to develop a novel electrochemical cell electrode having a low specific resistance, capable of improving the cycle performance of the cell, and having an inactive material layer as thin as possible.
Disclosure of Invention
The invention aims to: aiming at the defects of the prior art, the provided electrochemical battery pole piece comprises a current collector and an active substance layer, wherein a buffer layer is arranged between the current collector and the active substance layer, and the thickness of the buffer layer is 0.336 nm-4 μm; the buffer layer contains adhesive and conductive agent, the conductive agent includes graphite alkene, the lamella plane of graphite alkene with the contained angle between the plane of mass flow body is theta, and theta < 45% graphite alkene's quality accounts for the proportion of graphite alkene total amount more than or equal to 50%. At this time, the graphene tends to be arranged parallel to the current collector, and the thickness occupied by the graphene is smaller, so that the thickness of the buffer layer of the inactive material component is smaller, and the battery has higher energy density.
In order to achieve the purpose, the invention adopts the following technical scheme:
an electrochemical battery pole piece comprises a current collector and an active substance layer, wherein a buffer layer is arranged between the current collector and the active substance layer, and the thickness of the buffer layer is 0.336 nm-4 mu m; the buffer layer contains adhesive and conductive agent, the conductive agent includes graphite alkene, the lamella plane of graphite alkene with the contained angle between the plane of mass flow body is theta, and theta < 45% graphite alkene's quality accounts for the proportion of graphite alkene total amount more than or equal to 50%. Theta <45 degrees means that the graphene sheet layers tend to be arranged parallel to the current collector; the mass ratio of the theta <45 DEG graphene to the total amount of the graphene is greater than or equal to 50% ", that is, most of the graphene tends to be arranged parallel to the current collector; since graphene is the smallest in thickness dimension in each dimension, when the graphene is arranged parallel to the current collector, the thickness of the buffer layer is lower, so that the thickness of the buffer layer of the inactive material component is smaller, and the battery has higher energy density.
As an improvement of the electrochemical battery pole piece, the thickness of the buffer layer is 0.336 nm-2 μm, preferably 1 nm-1 μm, the smaller the thickness of the buffer layer is, the lower the thickness occupied by the inactive substance component is, and the higher the energy density of the battery is; the mass ratio of the adhesive to the buffer layer is 0.5-10%, and when the mass ratio of the adhesive is too low, the buffer layer is easy to fall off and the buffer effect is poor; when the proportion of the adhesive is too high, the conductivity of the layer is influenced; the mass proportion of the conductive agent in the buffer layer is 90-99.5%, the conductive agent proportion is too low, the buffer layer has high resistance and large impedance; the conductive agent has too high proportion and is easy to fall off, thereby influencing the buffering effect.
As an improvement of the electrochemical battery pole piece, the adhesive is at least one of polyvinylidene fluoride (PVDF), sodium carboxymethylcellulose (CMC) and Styrene Butadiene Rubber (SBR); the conductive agent also comprises at least one of conductive carbon black, super conductive carbon, carbon nano tubes, conductive carbon fibers and Keqin black; the mass of the graphene accounts for 10-100% of the total mass of the conductive agent.
As an improvement of the electrochemical cell pole piece, the thickness of the graphene is 0.336 nm-100 nm, the plane size of the graphene sheet layer (namely the equivalent diameter of the plane of the graphene sheet layer, and the equivalent diameter is the diameter of a circle with the same plane area) is larger than or equal to 10nm, and when the graphene sheet layer is small, the arrangement of the graphene sheet layer parallel to a current collector is difficult to control, so that the graphene effect of a larger sheet layer is better; the graphene is at least one of graphene oxide, graphene and modified graphene (in order to increase the response of the graphene sheet layer to the magnetic field, the modified graphene may be formed by compounding/grafting an easily-magnetized element, such as iron, steel, cobalt, nickel and the like, on the graphene sheet layer).
As an improvement of an electrochemical cell pole piece of the present invention, the ratio of the mass of graphene with an included angle θ of less than or equal to 30 ° (the smaller θ, which indicates that the graphene layer is more likely to be arranged parallel to the current collector) to the total amount of graphene is greater than or equal to 50% or/and the ratio of the mass of graphene with an included angle θ of less than or equal to 45 ° to the total amount of graphene is greater than or equal to 70% (the smaller θ, the higher the ratio, the thinner the obtained buffer layer can be made under the same graphene condition).
As an improvement of an electrochemical battery pole piece of the present invention, the electrochemical battery comprises a nickel-hydrogen battery, a nickel-cadmium battery, a lead-acid battery, a lithium ion battery, a capacitor, a zinc ion battery, a lithium-sulfur battery or a sodium ion battery; the pole piece comprises a positive pole piece or/and a negative pole piece.
The invention also comprises an electrochemical cell which comprises a positive plate, a negative plate, a separation film, electrolyte and an outer package, wherein the positive plate or/and the negative plate is/are selected from the electrode plates.
The invention also comprises a preparation method of the electrochemical cell, which mainly comprises the following steps:
step 1: preparing an electrode plate: mixing a conductive agent containing graphene, an adhesive and a solvent to prepare slurry with solid content of less than or equal to 40%, coating the slurry on a current collector, applying an external force to enable an included angle theta between a sheet plane of the graphene and the current collector plane to be less than or equal to 45 ℃, and drying to obtain the current collector containing a bottom treatment layer; then, arranging slurry containing active substances on the surface of the bottom treatment layer, and drying to obtain an electrode plate for later use; when the solid content of the slurry is low, the viscosity is low under the same glue amount, the graphene sheet layer can move more conveniently, and when the sheet graphene is paved on a current collector, the potential energy is lowest, namely the sheet graphene is in the most stable state, and the flat paving state is easy to maintain;
step 2: preparing a finished electrochemical cell: and (3) carrying out cold pressing, splitting and welding on the pole pieces obtained in the step (1), assembling the pole pieces with a counter electrode and an isolating membrane to obtain a bare cell, and then putting the bare cell into a shell/bag, drying, injecting liquid, forming and shaping to obtain the finished electrochemical cell.
As an improvement of the electrochemical cell preparation method, the solid content of the slurry in the step 1 is less than or equal to 6% (when the solid content is low, the viscosity of the slurry is low, and graphene is more easily paved on a current collector), an external force is applied to a magnetic field with an included angle between the applied external force and the current collector being greater than or equal to 45 degrees, and the application time is before the slurry is dried; the drying is freeze drying or heating drying.
As an improvement of the preparation method of the electrochemical cell, when the current collector containing the bottom treatment layer is prepared in the step 1, a layer of graphene is grown on the current collector by adopting a CVD method to serve as a buffer layer.
The invention has the beneficial effects that:
firstly, graphene has excellent conductivity, and can remarkably reduce the impedance of the battery when used as a conductive agent of a conductive buffer layer;
secondly, the graphene tends to be arranged parallel to the current collector, and the thickness occupied by the graphene is smaller, so that the thickness of a buffer layer of an inactive substance component is smaller, and the battery has higher energy density;
finally, in the preparation process, the slurry with low solid content and low viscosity is selected, so that the graphene sheet layer can move more conveniently, and the flaky graphene is lowest in potential energy when being laid on the current collector, namely is in the most stable state, and is easy to keep in the flat state.
Detailed Description
The present invention and its advantageous effects will be described in detail below with reference to specific embodiments, but the embodiments of the present invention are not limited thereto.
Comparative example, preparation of negative current collector buffer layer: selecting conductive carbon black as a conductive agent and PVDF as an adhesive (the mass ratio is 95: 5), preparing slurry with the solid content of 40%, and then coating the slurry on a copper current collector to obtain a current collector with a buffer layer with the thickness of 2 microns;
preparing a negative plate: selecting a silicon-graphite mixed material with a mass ratio of 1:9 as an active substance, preparing to obtain negative electrode slurry, and then coating the negative electrode slurry on the surface of the current collector to obtain a negative electrode plate for later use;
preparing a finished electrochemical cell: and (3) after the negative electrode is subjected to cold pressing, splitting and welding, the negative electrode, the positive electrode and the isolating film are wound to obtain a naked battery core, then an aluminum plastic film is selected as a packaging bag, and top sealing, side sealing, drying, liquid injection, formation and shaping are carried out to obtain the finished electrochemical battery.
Example 1, unlike the comparative example, the present example includes the following steps:
preparing a negative current collector buffer layer: selecting graphene with the sheet thickness of 1nm and the plane size of 1 mu m as a conductive agent, PVDF as an adhesive (the mass ratio is 95;
the rest is the same as the comparative example, and is not described herein.
Embodiment 2, different from embodiment 1, this embodiment includes the following steps:
preparing a negative current collector buffer layer: selecting graphene with the sheet thickness of 1nm and the plane size of 1 mu m as a conductive agent, PVDF as an adhesive (the mass ratio is 95;
the rest is the same as the embodiment 1, and the description is omitted here.
Embodiment 3, unlike embodiment 1, this embodiment includes the following steps:
preparing a negative current collector buffer layer: selecting graphene with the sheet thickness of 1nm and the plane size of 1 mu m as a conductive agent, PVDF as an adhesive (mass ratio is 95;
the rest is the same as the embodiment 1, and the description is omitted here.
Embodiment 4, unlike embodiment 1, this embodiment includes the following steps:
preparing a negative current collector buffer layer: selecting graphene with the sheet thickness of 1nm and the plane size of 0.4 mu m as a conductive agent, PVDF as an adhesive (mass ratio is 95;
the rest is the same as embodiment 1, and the description is omitted here.
Example 5, unlike example 1, this example includes the following steps:
preparing a negative current collector buffer layer: selecting graphene with the sheet thickness of 1nm and the plane size of 0.2 mu m as a conductive agent, PVDF as an adhesive (mass ratio is 95;
the rest is the same as the embodiment 1, and the description is omitted here.
Embodiment 6, unlike embodiment 1, this embodiment includes the following steps:
preparing a negative current collector buffer layer: selecting graphene with the sheet thickness of 1nm and the plane size of 0.1 mu m as a conductive agent, PVDF as an adhesive (mass ratio is 95;
the rest is the same as the embodiment 1, and the description is omitted here.
Embodiment 7, different from embodiment 1, this embodiment includes the following steps:
preparing a negative current collector buffer layer: selecting graphene with the lamella thickness of 100nm and the plane size of 20 microns and conductive carbon black (the particle size is 1 micron) (the mass ratio is 1:9) as a conductive agent, PVDF is an adhesive (the mass ratio is 99.5;
the rest is the same as the embodiment 1, and the description is omitted here.
Embodiment 8, different from embodiment 1, this embodiment includes the following steps:
preparing a negative current collector buffer layer: selecting graphene with a sheet thickness of 10nm and a plane size of 10 microns and conductive carbon black (with a particle size of 1 micron) (the mass ratio is 5:5) as a conductive agent, PVDF (polyvinylidene fluoride) as an adhesive (the mass ratio is 97);
the rest is the same as the embodiment 1, and the description is omitted here.
Example 9, unlike example 1, this example includes the following steps:
preparing a negative current collector buffer layer: selecting modified graphene with a lamella thickness of 2nm and a plane size of 5 microns (nickel element is grafted on the modified graphene, and the content of the modified graphene is 0.5%) as a conductive agent, PVDF (polyvinylidene fluoride) is an adhesive (the mass ratio is 90;
the rest is the same as embodiment 1, and the description is omitted here.
Embodiment 10, different from embodiment 1, this embodiment includes the following steps:
preparing a negative current collector buffer layer: selecting modified graphene with the lamella thickness of 4nm and the plane size of 5 microns (cobalt element is grafted on the modified graphene, and the content is 0.5%) as a conductive agent, PVDF (polyvinylidene fluoride) as a bonding agent (the mass ratio is 90;
the rest is the same as embodiment 1, and the description is omitted here.
Example 11, unlike example 1, this example includes the steps of:
preparing a negative current collector buffer layer: growing a graphene sheet layer on the surface of the copper foil by adopting a CVD (chemical vapor deposition) method to obtain a buffer layer current collector with the thickness of 0.336 mu m of the buffer layer for later use;
the rest is the same as the embodiment 1, and the description is omitted here.
Embodiment 12, unlike 4, this embodiment includes the steps of:
preparing a positive current collector buffer layer: selecting graphene with the sheet thickness of 3nm and the plane size of 0.4 mu m as a conductive agent, PVDF as an adhesive (mass ratio is 95;
preparing a positive plate: selecting lithium cobaltate as an active substance, preparing to obtain positive electrode slurry, and then coating the positive electrode slurry on the surface of the current collector to obtain a positive electrode plate for later use;
preparing a finished electrochemical cell: and after the positive electrode is subjected to cold pressing, splitting and welding, the positive electrode, the negative electrode and the isolating film are wound to obtain a naked battery cell, then an aluminum plastic film is selected as a packaging bag, and top sealing, side sealing, drying, liquid injection, formation and shaping are carried out to obtain a finished electrochemical battery.
The rest is the same as embodiment 4, and is not described herein.
Characterization and testing:
500 week cycle test: the cells of the examples and comparative examples were subjected to cycle testing in an environment at 25 ℃ according to the following protocol: standing for 3min; charging to 4.2V at constant current of 0.5C and charging to 0.05C at constant voltage; standing for 3min; discharging at constant current of 0.5C to 3.0V to obtain first discharge capacity D0; standing for 3min; then, the above test is repeated for 499 weeks to obtain the capacity D499, and the capacity retention rate after 500-week circulation of the battery cell is D499/D0, and the result is shown in Table 1;
direct current Impedance (IMP) test the cells of the examples and comparative examples were subjected to a direct current Impedance (IMP) test in an environment at 25 ℃ according to the following procedure: standing for 3min; charging to 3.85V at 0.5C constant current, and charging to 0.05C at constant voltage; standing for 3min; then, performing direct current impedance test by using an electrochemical workstation to obtain direct current internal resistance of the battery cell, which is shown in table 1;
as can be seen from table 1, the present invention can significantly improve the cycle performance of the battery, while reducing the internal resistance of the battery, and thus can reduce the heat release during the charge and discharge of the battery, and improve the safety performance of the battery; meanwhile, the thickness of the buffer layer of the present invention is very small, i.e., the thickness of the inactive material component in the electrode is very small, and thus the resulting battery has a higher energy density.
TABLE 1 electric performance of electrochemical energy storage devices of comparative examples and examples
Variations and modifications to the above-described embodiments may also occur to those skilled in the art, which fall within the scope of the invention as disclosed and taught herein. Therefore, the present invention is not limited to the above-mentioned embodiments, and any obvious improvement, replacement or modification made by those skilled in the art based on the present invention is within the protection scope of the present invention. Furthermore, although specific terms are employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation.
Claims (9)
1. An electrochemical cell comprises a positive plate, a negative plate, an isolating membrane, electrolyte and an outer package, and is characterized in that the positive plate or/and the negative plate comprises a current collector and an active substance layer, a buffer layer is arranged between the current collector and the active substance layer, and the thickness of the buffer layer is 0.336 nm-4 μm; the buffer layer contains an adhesive and a conductive agent, the conductive agent comprises graphene, an included angle between a sheet plane of the graphene and a plane where the length and the width of the current collector are located is theta, and the mass of the graphene with theta less than 45 degrees accounts for more than or equal to 50% of the total amount of the graphene; the thickness of the graphene is 0.336 nm-100 nm, and the size of a lamellar plane of the graphene is greater than or equal to 10nm; the dimension of the graphene lamellar plane is the equivalent diameter of the graphene lamellar plane, and the equivalent diameter is the diameter of a circle with the same area as the plane;
the preparation method mainly comprises the following steps:
step 1: preparing an electrode plate: mixing a conductive agent containing graphene, an adhesive and a solvent to prepare slurry with solid content of less than or equal to 40%, coating the slurry on a current collector, applying an external force to enable an included angle theta between a sheet plane of the graphene and a plane where the length and the width of the current collector are located to be less than or equal to 45 ℃, and drying to obtain the current collector containing a bottom treatment layer; then, arranging slurry containing active substances on the surface of the bottom treatment layer, and drying to obtain an electrode plate for later use;
and 2, step: preparing a finished electrochemical cell: the pole pieces obtained in the step 1 are subjected to cold pressing, splitting and welding, then assembled with a counter electrode and an isolating membrane to obtain a bare cell, and then placed into a shell/bag, dried, injected with liquid, formed and shaped to obtain a finished product of the electrochemical cell;
and applying an external force to apply a magnetic field with an included angle between the magnetic induction line and the current collector larger than or equal to 45 degrees, wherein the application time is before drying the slurry.
2. An electrochemical cell according to claim 1, wherein: the thickness of the buffer layer is 0.336 nm-2 mu m; the mass of the adhesive accounts for 0.5-10% of the mass of the buffer layer, and the mass of the conductive agent accounts for 90-99.5% of the mass of the buffer layer.
3. An electrochemical cell according to claim 1, wherein: the adhesive is at least one of polyvinylidene fluoride (PVDF), sodium carboxymethylcellulose (CMC) and Styrene Butadiene Rubber (SBR); the conductive agent also comprises at least one of conductive carbon black, carbon nano tubes and conductive carbon fibers; the mass of the graphene accounts for 10-100% of the total mass of the conductive agent.
4. An electrochemical cell according to claim 1, wherein: the graphene is graphene oxide.
5. An electrochemical cell according to claim 1, wherein: the graphene is unmodified graphene.
6. An electrochemical cell according to claim 1, wherein: the graphene is modified graphene.
7. An electrochemical cell according to claim 1, wherein: the proportion of the mass of the graphene with the included angle theta not more than 30 degrees to the total amount of the graphene is more than or equal to 50%, or/and the proportion of the mass of the graphene with the included angle theta not more than 45 degrees to the total amount of the graphene is more than or equal to 70%.
8. An electrochemical cell according to claim 1, wherein: the electrochemical cell includes a nickel-hydrogen cell, a nickel-cadmium cell, a lead-acid cell, a lithium ion cell, a capacitor, a zinc ion cell, a lithium sulfur cell, or a sodium ion cell.
9. An electrochemical cell according to claim 1, wherein the slurry of step 1 has a solids content of less than or equal to 6%; the drying is freeze drying or heating drying.
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| CN107749479B (en) * | 2016-09-14 | 2020-09-25 | 万向一二三股份公司 | Carbon-coated copper foil negative plate and power battery containing same |
| CN106784996A (en) * | 2017-01-16 | 2017-05-31 | 安徽益佳通电池有限公司 | A kind of high power density lithium ion battery |
| CN108288714B (en) * | 2018-01-27 | 2019-01-29 | 深圳名飞远科技有限公司 | A kind of modified copper foil electrode of graphene for silicon-based anode power battery |
| CN109037585A (en) * | 2018-08-03 | 2018-12-18 | 江苏芯界新能源科技有限公司 | The preparation method of negative electrode of lithium ion battery substrate |
| CN111490253B (en) * | 2019-01-29 | 2021-12-10 | 宁德时代新能源科技股份有限公司 | Negative pole piece and lithium ion secondary battery thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103380519A (en) * | 2011-02-18 | 2013-10-30 | 丰田自动车株式会社 | Lithium-ion secondary cell and method for manufacturing same |
| CN103430360A (en) * | 2011-03-11 | 2013-12-04 | 丰田自动车株式会社 | Non-aqueous electrolyte secondary battery and manufacturing method thereof |
| CN104201358A (en) * | 2014-09-26 | 2014-12-10 | 南京中储新能源有限公司 | Carbon-sulfur composite positive electrode wrapped by nano-polyaniline and preparation method of carbon-sulfur composite positive electrode |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2004220926A (en) * | 2003-01-15 | 2004-08-05 | Matsushita Electric Ind Co Ltd | Negative electrode for nonaqueous electrolyte secondary battery |
| CN102208598B (en) * | 2011-05-12 | 2014-03-12 | 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 |
| KR101631776B1 (en) * | 2011-07-29 | 2016-06-17 | 도요타지도샤가부시키가이샤 | Lithium ion secondary battery |
| TWI533497B (en) * | 2013-08-28 | 2016-05-11 | Current collection layer structure |
-
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103380519A (en) * | 2011-02-18 | 2013-10-30 | 丰田自动车株式会社 | Lithium-ion secondary cell and method for manufacturing same |
| CN103430360A (en) * | 2011-03-11 | 2013-12-04 | 丰田自动车株式会社 | Non-aqueous electrolyte secondary battery and manufacturing method thereof |
| CN104201358A (en) * | 2014-09-26 | 2014-12-10 | 南京中储新能源有限公司 | Carbon-sulfur composite positive electrode wrapped by nano-polyaniline and preparation method of carbon-sulfur composite positive electrode |
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