CN114005990A - Light battery current collector, preparation method thereof and battery based on current collector - Google Patents
Light battery current collector, preparation method thereof and battery based on current collector Download PDFInfo
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- CN114005990A CN114005990A CN202011606154.7A CN202011606154A CN114005990A CN 114005990 A CN114005990 A CN 114005990A CN 202011606154 A CN202011606154 A CN 202011606154A CN 114005990 A CN114005990 A CN 114005990A
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- 238000002360 preparation method Methods 0.000 title claims abstract description 12
- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 41
- 239000010935 stainless steel Substances 0.000 claims abstract description 41
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 38
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 32
- 229920000049 Carbon (fiber) Polymers 0.000 claims abstract description 28
- 239000004917 carbon fiber Substances 0.000 claims abstract description 28
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 19
- 239000010439 graphite Substances 0.000 claims abstract description 19
- 239000003575 carbonaceous material Substances 0.000 claims abstract description 11
- 229910021393 carbon nanotube Inorganic materials 0.000 claims abstract description 9
- 239000002041 carbon nanotube Substances 0.000 claims abstract description 9
- 229910021389 graphene Inorganic materials 0.000 claims abstract description 7
- 239000011148 porous material Substances 0.000 claims abstract description 5
- 239000002002 slurry Substances 0.000 claims description 29
- 238000001035 drying Methods 0.000 claims description 17
- 238000003825 pressing Methods 0.000 claims description 17
- 239000011888 foil Substances 0.000 claims description 12
- 238000003756 stirring Methods 0.000 claims description 11
- 239000011230 binding agent Substances 0.000 claims description 10
- 239000000843 powder Substances 0.000 claims description 9
- 238000002156 mixing Methods 0.000 claims description 7
- 238000005303 weighing Methods 0.000 claims description 7
- 239000002904 solvent Substances 0.000 claims description 4
- 239000000126 substance Substances 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 2
- 239000011268 mixed slurry Substances 0.000 claims description 2
- 239000004744 fabric Substances 0.000 claims 3
- 239000004020 conductor Substances 0.000 abstract description 10
- 238000005260 corrosion Methods 0.000 abstract description 8
- 230000007797 corrosion Effects 0.000 abstract description 8
- 239000000463 material Substances 0.000 abstract description 4
- 230000005518 electrochemistry Effects 0.000 abstract description 2
- NUJOXMJBOLGQSY-UHFFFAOYSA-N manganese dioxide Chemical compound O=[Mn]=O NUJOXMJBOLGQSY-UHFFFAOYSA-N 0.000 description 28
- 239000004745 nonwoven fabric Substances 0.000 description 8
- 239000003792 electrolyte Substances 0.000 description 5
- WJZHMLNIAZSFDO-UHFFFAOYSA-N manganese zinc Chemical group [Mn].[Zn] WJZHMLNIAZSFDO-UHFFFAOYSA-N 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 4
- 239000007770 graphite material Substances 0.000 description 4
- 238000004080 punching Methods 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- JLVVSXFLKOJNIY-UHFFFAOYSA-N Magnesium ion Chemical compound [Mg+2] JLVVSXFLKOJNIY-UHFFFAOYSA-N 0.000 description 3
- 239000002253 acid Substances 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 3
- -1 graphite alkene Chemical class 0.000 description 3
- 229910001425 magnesium ion Inorganic materials 0.000 description 3
- 230000014759 maintenance of location Effects 0.000 description 3
- 238000005096 rolling process Methods 0.000 description 3
- 239000011701 zinc Substances 0.000 description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- 230000002378 acidificating effect Effects 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- GNTDGMZSJNCJKK-UHFFFAOYSA-N divanadium pentaoxide Chemical compound O=[V](=O)O[V](=O)=O GNTDGMZSJNCJKK-UHFFFAOYSA-N 0.000 description 2
- 229910001416 lithium ion Inorganic materials 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- XLOMVQKBTHCTTD-UHFFFAOYSA-N zinc oxide Inorganic materials [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- FKNQFGJONOIPTF-UHFFFAOYSA-N Sodium cation Chemical compound [Na+] FKNQFGJONOIPTF-UHFFFAOYSA-N 0.000 description 1
- PTFCDOFLOPIGGS-UHFFFAOYSA-N Zinc dication Chemical compound [Zn+2] PTFCDOFLOPIGGS-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000011889 copper foil Substances 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229940099596 manganese sulfate Drugs 0.000 description 1
- 235000007079 manganese sulphate Nutrition 0.000 description 1
- 239000011702 manganese sulphate Substances 0.000 description 1
- SQQMAOCOWKFBNP-UHFFFAOYSA-L manganese(II) sulfate Chemical compound [Mn+2].[O-]S([O-])(=O)=O SQQMAOCOWKFBNP-UHFFFAOYSA-L 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000007774 positive electrode material Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 229910001415 sodium ion Inorganic materials 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
- CFJRPNFOLVDFMJ-UHFFFAOYSA-N titanium disulfide Chemical compound S=[Ti]=S CFJRPNFOLVDFMJ-UHFFFAOYSA-N 0.000 description 1
- 238000001947 vapour-phase growth Methods 0.000 description 1
- 238000009941 weaving Methods 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 229960001296 zinc oxide Drugs 0.000 description 1
- NWONKYPBYAMBJT-UHFFFAOYSA-L zinc sulfate Chemical compound [Zn+2].[O-]S([O-])(=O)=O NWONKYPBYAMBJT-UHFFFAOYSA-L 0.000 description 1
- 229960001763 zinc sulfate Drugs 0.000 description 1
- 229910000368 zinc sulfate Inorganic materials 0.000 description 1
Classifications
-
- 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
- H01M4/665—Composites
- H01M4/667—Composites in the form of layers, e.g. coatings
-
- 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
-
- 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
- H01M10/36—Accumulators not provided for in groups H01M10/05-H01M10/34
-
- 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
- H01M4/70—Carriers or collectors characterised by shape or form
- H01M4/80—Porous plates, e.g. sintered carriers
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Composite Materials (AREA)
- Materials Engineering (AREA)
- Cell Electrode Carriers And Collectors (AREA)
Abstract
The invention discloses a light battery current collector, a preparation method thereof and a battery based on the current collector, and belongs to the technical field of electrochemistry. The invention utilizes a stainless steel mesh or a carbon material mesh which has good conductivity, high tensile strength and corrosion resistance as a porous conductive framework, graphite, expanded graphite, conductive carbon fiber, carbon nano tube, graphene, conductive carbon black and other materials which have good conductivity, light weight and corrosion resistance are filled and covered in the pores and the surface of the porous conductive framework as auxiliary conductors, and the porous conductive framework and the auxiliary conductors are pressed together to form a film as a battery current collector.
Description
Technical Field
The invention belongs to the technical field of electrochemistry, and relates to a light battery current collector, a preparation method thereof and a battery.
Background
Since petrochemical energy is a non-renewable resource and serious in pollution, most countries are currently developing new energy batteries to replace petrochemical energy, and lithium ion batteries have been developed greatly in the aspects of electric vehicles and energy storage. Manganese dioxide has a theoretical capacity of 308 mAhg < -1 >, an aqueous electrolyte secondary battery formed by a zinc cathode and a manganese dioxide anode has a very high capacity, but a secondary zinc-manganese battery needs to adopt a slightly acidic electrolyte, aluminum foil and copper foil current collectors commonly used at present cannot be used as current collectors of the manganese dioxide anode due to oxidation in the acidic electrolyte, stainless steel foils can be used as current collectors of the manganese dioxide anode reluctantly, but the stainless steel foils can also act with manganese dioxide to increase resistance, and the stainless steel foils are difficult to process into very thin current collectors due to high hardness, and meanwhile, the stainless steel density is high, and the energy density of the battery can be reduced by using the stainless steel foils as the battery current collectors.
The graphite material has good conductivity and low density, the current collector graphite with the same thickness is much lighter than stainless steel foil, the graphite material also has very high acid and alkali resistance and is an ideal current collector of the acid electrolyte battery, but the graphite material is brittle, and the thin current collector prepared by the graphite material has very low strength and is difficult to be used as a battery current collector on a large scale, so that the development of the light battery current collector capable of resisting acid corrosion and oxidation has important practical value.
Disclosure of Invention
The stainless steel net has high strength, the stainless steel net with the same thickness is lighter than the stainless steel foil, and the carbon fiber material also has high tensile strength and good conductivity. The stainless steel mesh or the carbon material mesh is used as a conductive framework, and a layer of corrosion-resistant graphite or conductive carbon material is filled and coated in the pores and the surface of the framework to be pressed into a film to be used as a battery current collector, so that the battery current collector can keep excellent conductivity and corrosion resistance of the graphite and the carbon material, has the tensile strength of the stainless steel and the carbon fiber material, and has lighter weight than a stainless steel foil. Accordingly, the invention provides a light battery current collector, a preparation method thereof and a battery based on the current collector.
The technical scheme of the invention is as follows:
the utility model provides a light battery mass flow body, the mass flow body includes porous electrically conductive skeleton and auxiliary conductor, auxiliary conductor fills the cladding in whole or partial hole and the surface of porous electrically conductive skeleton, porous electrically conductive skeleton is stainless steel net or carbon material net, auxiliary conductor is graphite, expanded graphite, electrically conductive carbon fiber, carbon nanotube, graphite alkene, the electrically conductive carbon black in any one or more.
The stainless steel mesh of the light battery current collector can be any one of a stainless steel woven welding mesh, a stainless steel punching mesh, a stainless steel woven mesh and a stainless steel foil with porosity of more than 30%.
The carbon material net of the light battery current collector can be any one of a conductive carbon fiber woven net, a conductive carbon fiber non-woven fabric with the porosity of more than 30%, a carbon fiber non-woven fabric with the porosity of more than 30% and a carbon nano tube non-woven fabric with the porosity of more than 30%.
The thickness of the light battery current collector is not more than 200 μm, and preferably the thickness is 5 μm-20 μm.
A preparation method of a light battery current collector comprises the following steps:
(1) Weighing auxiliary conductive powder and a solvent, mixing and stirring to form viscous slurry, extruding the uniformly stirred and mixed slurry on a porous conductive framework, and drying the slurry to be in a daub shape;
(2) And (2) transferring the porous conductive framework loaded with the auxiliary conductive substance obtained in the step (1) into a roller press, pressing the auxiliary conductive substance and the porous conductive framework together to form a film, drying the film, and pressing the film again to obtain the light battery current collector.
A preparation method of a light battery current collector comprises the following steps:
(1) Weighing auxiliary conductive powder and a solvent, mixing and stirring to form a thick and uniform slurry;
(2) And (2) simultaneously introducing the slurry obtained in the step (1) and the porous conductive framework into a press roller of a roller press, pressing the auxiliary conductive substance slurry and the porous conductive framework together to form a film, drying the film, and pressing once to obtain the light battery current collector.
In the preparation method of the light battery current collector, when the auxiliary conductive material powder slurry in the step (1) is prepared, a binder with the auxiliary conductive material content of less than 20% may be added, or the binder may not be added.
The invention relates to a battery based on a light battery current collector, wherein a battery positive electrode or negative electrode current collector is the light battery current collector.
The battery based on the light battery current collector is not particularly limited, and may be any one of a zinc/manganese dioxide battery, a zinc/vanadium pentoxide battery, a titanium disulfide/manganese dioxide combined aluminum ion battery or a magnesium ion battery, a titanium dioxide/manganese dioxide combined aluminum ion battery or a magnesium ion battery, and other lithium ion batteries, sodium ion batteries, magnesium ion batteries, and zinc ion batteries.
According to the invention, the stainless steel mesh or the carbon material mesh which is good in conductivity, high in tensile strength and corrosion-resistant is used as the porous conductive framework, the pores and the surface of the porous conductive framework are filled with materials which are good in conductivity, hydrogen in quality and corrosion-resistant, such as graphite, expanded graphite, conductive carbon fiber, carbon nano tube, graphene, conductive carbon black and the like, and serve as auxiliary conductive objects, and the porous conductive framework and the auxiliary conductive objects are pressed together to form a film to serve as a battery current collector, so that the composite current collector has light quality while excellent conductivity and strength are ensured.
In conclusion, the beneficial effects of the invention are as follows:
the invention provides a light battery current collector, a preparation method and a battery based on the current collector, wherein a stainless steel net or a carbon material net is used as a porous conductive framework, a graphite or conductive carbon material is filled and covered on the pores and the surface of the porous conductive framework to be used as an auxiliary conductor, and the porous conductive framework and the auxiliary conductor are pressed together to form a film to be used as the battery current collector, so that the composite current collector has excellent conductivity, high strength and excellent corrosion resistance, and the current collector has light weight.
Detailed Description
The following describes in detail specific embodiments of the present invention. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.
The endpoints of the ranges and any values disclosed herein are not limited to the precise range or value, and such ranges or values should be understood to encompass values close to those ranges or values. For numerical ranges, each range between its endpoints and individual point values, and each individual point value can be combined with each other to give one or more new numerical ranges, and such numerical ranges should be construed as specifically disclosed herein.
The present invention will be described in detail below by way of examples.
The stainless steel mesh used in the following examples was a woven and welded stainless steel mesh (mesh diameter 10 μm, mesh size 50 μm), which was previously pressed into a 10 μm thick mesh before use, and a conductive carbon fiber woven mesh (mesh size 80 μm), a carbon fiber mesh (mesh size 80 μm) and a conductive carbon fiber nonwoven fabric (porosity 60%) were each pre-impregnated with a graphite conductive adhesive and subjected to pressing and drying to form. The graphite powder is flake graphite powder with 300 meshes, the particle size of the expanded graphite is 300 meshes, the particle size of the graphene is 9-10 mu m, the binder used for the auxiliary conductor is LA136D, and the related proportions are the solid mass ratio.
In the zinc-manganese battery described in the following examples, a positive electrode active material was α -type manganese dioxide, an electrolyte was a 2mol/L zinc sulfate +0.2mol/L manganese sulfate aqueous solution, a negative electrode was a negative electrode sheet obtained by pressing a mixture of a metallic zinc powder and a binder, and a separator was a glass fiber separator, and a pouch cell was assembled for testing.
Example 1
Preparing a stainless steel weaving welding net for cleaning and drying, weighing graphite powder and LA136D binder according to a ratio of 99, adding water and stirring to form sticky slurry, stirring and mixing the slurry uniformly, then extruding the slurry on the stainless steel net, drying the slurry to be in a cement state, transferring a stainless steel net loaded with the graphite powder into a roller press, pressing the graphite and the stainless steel net together to form a film with the thickness of 15 mu m, drying the film at 90 ℃ and pressing the film again to obtain the light battery current collector.
When the light battery current collector prepared in the example 1 is used as a current collector of a manganese dioxide positive electrode to prepare a zinc-manganese battery for testing, the capacity retention rate of the battery after being charged and discharged for 100 circles is 99%.
Example 2
Preparing a conductive carbon fiber woven mesh, adding water and ethanol into expanded graphite, stirring to form sticky slurry, after the slurry is uniformly stirred and mixed, simultaneously introducing the expanded graphite slurry and the conductive carbon fiber woven mesh into a press roller of a roller press, rolling the expanded graphite and the carbon fiber woven mesh together to form a film with the thickness of 20 micrometers, drying the film, and pressing once to obtain the light battery current collector.
When the light battery current collector prepared in the embodiment 2 is used as a current collector of a manganese dioxide positive electrode to prepare a zinc-manganese battery for testing, the capacity retention rate of the battery after being charged and discharged for 100 circles circularly is 99%.
Example 3
Preparing a stainless steel punching mesh (with porosity of 50% and thickness of 10 microns), cleaning and drying, weighing 80% of carbon nano tubes (with length of 3-11 microns) and LA136D binder according to the weight of 20, adding water and stirring to form sticky slurry, after the slurry is uniformly stirred and mixed, simultaneously introducing the carbon nano tube slurry and the stainless steel punching mesh into a press roller of a roller press, rolling the carbon nano tubes and the stainless steel punching mesh together to form a film with thickness of 15 microns, drying the film and pressing again to obtain the light battery current collector.
Example 4
Preparing a conductive carbon fiber non-woven fabric with porosity of 60%, taking graphene powder and LA136D binder according to 99% and mixing with water, stirring to form sticky slurry, uniformly stirring and mixing the slurry, coating the slurry on the conductive carbon fiber non-woven fabric, drying the slurry to be in a daub shape, transferring the conductive carbon fiber non-woven fabric loaded with graphene into a roller press, pressing the graphene and the conductive carbon fiber non-woven fabric into a film with thickness of 5 microns, drying the film at 90 ℃, and pressing again to obtain the light battery current collector.
Example 5
Preparing a stainless steel woven mesh, cleaning and drying, taking conductive carbon fiber (vapor-phase growth carbon fiber) powder and LA136D binder according to 98 portions, adding water, stirring to form sticky slurry, after the slurry is uniformly stirred and mixed, simultaneously guiding the conductive carbon fiber slurry and the stainless steel woven mesh into a compression roller of a roller press, rolling the conductive carbon fiber and the stainless steel woven mesh together to form a film with the thickness of 20 microns, drying the film, and pressing again to obtain the light battery current collector.
Example 6
Preparing a carbon fiber woven mesh, weighing conductive carbon black (SP-Li) powder and LA136D binder according to a ratio of 98.
Comparative example 1
The zinc-manganese battery prepared by using the stainless steel foil as the current collector of the manganese dioxide anode is tested, and the capacity retention rate of the battery after 100 circles of charge-discharge cycle is 38 percent
From the test results of the above examples 1-2 and comparative example 1, it can be seen that the direct use of the stainless steel foil as the manganese dioxide positive electrode current collector of the subacid zn-mn battery leads to the rapid decrease of the battery capacity, while the light battery current collector provided by the invention is used as the manganese dioxide positive electrode current collector of the subacid zn-mn battery, and the battery has very good cycle charge-discharge battery performance.
The embodiments of the present invention have been described in detail, however, the present invention is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present invention within the technical idea of the present invention, and these simple modifications are within the protective scope of the present invention.
It should be noted that the various features described in the foregoing embodiments may be combined in any suitable manner without contradiction. The invention is not described in detail in order to avoid unnecessary repetition.
In addition, any combination of the various embodiments of the present invention is also possible, and the same should be considered as the disclosure of the present invention as long as it does not depart from the spirit of the present invention.
Claims (8)
1. The light battery current collector is characterized by comprising a porous conductive framework and an auxiliary conductive object, wherein the auxiliary conductive object is filled and coated on all or part of pores and surfaces of the porous conductive framework, the porous conductive framework is a stainless steel mesh or a carbon material mesh, and the auxiliary conductive object is any one or more than one of graphite, expanded graphite, conductive carbon fibers, carbon nano tubes, graphene and conductive carbon black.
2. The lightweight battery current collector as defined in claim 1, wherein the stainless steel mesh is selected from the group consisting of a woven and welded stainless steel mesh, a punched stainless steel mesh, a woven stainless steel mesh, and a stainless steel foil having a porosity of 30% or more.
3. The lightweight battery current collector as defined in claim 1, wherein the carbon material mesh is any one of a woven conductive carbon fiber mesh, a woven carbon fiber mesh, a non-woven conductive carbon fiber fabric having a porosity of 30% or more, a non-woven carbon fiber fabric having a porosity of 30% or more, and a non-woven carbon nanotube fabric having a porosity of 30% or more.
4. A lightweight battery current collector as claimed in claim 1, wherein said current collector has a thickness of no more than 200 μm, preferably a thickness of 5 μm to 20 μm.
5. The preparation method of the light battery current collector is characterized by comprising the following steps:
(1) Weighing auxiliary conductive powder and a solvent, mixing and stirring to form viscous slurry, extruding the uniformly stirred and mixed slurry on a porous conductive framework, and drying the slurry to be in a daub shape;
(2) And (2) transferring the porous conductive framework loaded with the auxiliary conductive object obtained in the step (1) into a roller press, pressing the auxiliary conductive object and the porous conductive framework together to form a film, drying the film, and pressing the film once to obtain the light battery current collector.
6. The preparation method of the light battery current collector is characterized by comprising the following steps:
(1) Weighing auxiliary conductive powder and a solvent, mixing and stirring to form thick and uniform slurry;
(2) And (2) simultaneously introducing the slurry obtained in the step (1) and the porous conductive framework into a press roller of a roller press, pressing the auxiliary conductive slurry and the porous conductive framework together to form a film, drying the film, and pressing the film once again to obtain the light battery current collector.
7. The method for preparing the current collector of the lightweight battery according to claims 3 to 4, wherein a binder with an auxiliary conductive substance content of less than 20% may be added or not added during the preparation of the auxiliary conductive powder slurry in step (1).
8. A battery based on a lightweight battery current collector, characterized in that the battery positive or negative current collector is a lightweight battery current collector as claimed in any one of claims 1-4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011606154.7A CN114005990A (en) | 2020-12-30 | 2020-12-30 | Light battery current collector, preparation method thereof and battery based on current collector |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011606154.7A CN114005990A (en) | 2020-12-30 | 2020-12-30 | Light battery current collector, preparation method thereof and battery based on current collector |
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| Publication Number | Publication Date |
|---|---|
| CN114005990A true CN114005990A (en) | 2022-02-01 |
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| CN202011606154.7A Pending CN114005990A (en) | 2020-12-30 | 2020-12-30 | Light battery current collector, preparation method thereof and battery based on current collector |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024077473A1 (en) * | 2022-10-11 | 2024-04-18 | 宁德时代新能源科技股份有限公司 | Current collector and manufacturing method therefor, and electrode plate, secondary battery and electric apparatus |
-
2020
- 2020-12-30 CN CN202011606154.7A patent/CN114005990A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024077473A1 (en) * | 2022-10-11 | 2024-04-18 | 宁德时代新能源科技股份有限公司 | Current collector and manufacturing method therefor, and electrode plate, secondary battery and electric apparatus |
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