CN106025176A - Negative plate and lithium ion battery - Google Patents

Negative plate and lithium ion battery Download PDF

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Publication number
CN106025176A
CN106025176A CN201610456894.4A CN201610456894A CN106025176A CN 106025176 A CN106025176 A CN 106025176A CN 201610456894 A CN201610456894 A CN 201610456894A CN 106025176 A CN106025176 A CN 106025176A
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pole piece
cathode pole
active material
composite fibre
silane coupler
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CN201610456894.4A
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CN106025176B (en
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李彩彩
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Ningde Amperex Technology Ltd
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Ningde Amperex Technology Ltd
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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
    • H01M4/628—Inhibitors, e.g. gassing inhibitors, corrosion inhibitors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/052—Li-accumulators
    • H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
    • 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
    • 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

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Battery Electrode And Active Subsutance (AREA)

Abstract

The invention relates to a negative plate. The negative plate comprises a current collector and an active material layer which is distributed on the current collector, wherein the active material layer comprises an active material and composite fibers; the active material comprises at least one kind of graphite or silicon carbon alloy; and when the lithium ion battery including the negative plate is charged, the composite fibers can be firmly constrained between the active material granules to reduce the rotation of the active material granules and restrain the expansion of the negative plate so as to reduce the cyclic expansion of the battery.

Description

A kind of cathode pole piece and lithium ion battery
Technical field
The present invention relates to technical field of lithium batteries, be specifically related to a kind of cathode pole piece and lithium ion battery.
Background technology
Commercial Li-ion battery negative material uses graphite-like material with carbon element at present, but its theory is held Amount only 372mAh/g, thus limit the further raising of lithium ion battery specific energy, and carbon It is low and limit the development of lithium-ion-power cell to there is charge/discharge capacity in material.
Make silicon materials and graphite be combined, formed and have complementary advantages, obtain high power capacity, the answering of good cycle Close negative material, meet the requirement of lithium ion battery anticathode material.But cathode pole piece embedding lithium from In subprocess, there is bigger rotation in active material, and in cyclic process, binding agent is tired, bound subtracts Weak, and then cause cathode pole piece to produce bigger expansion.
In consideration of it, special, the application is proposed, negative as the lithium battery of negative material to solve graphite or carbon silicon The expansion issues of pole pole piece.
Summary of the invention
The purpose of the application is to provide a kind of cathode pole piece and lithium ion battery, has suppression containing stone The effect that the negative pole piece of battery of ink or carbon silicium cathode active material expands.
The concrete technical scheme of the present invention is:
The application relates to a kind of cathode pole piece, including collector and distribution active substance on a current collector Layer, described active material layer contains active material and composite fibre；Described active material include graphite or At least one in silicon-carbon alloy.
Preferably, described composite fibre includes sandwich layer and is coated with the clad of described sandwich layer；Described sandwich layer Material be the intensity fibrous material at 700-2500MPa；Described coating layer material is silane coupler The Graphene modified.
Preferably, the material of described sandwich layer is aramid fiber, polyethylene fibre or the mixture of the two； Described aramid fiber, the molecular weight of polyethylene fibre are preferably 50-140 ten thousand.
Preferably, described composite fibre is the pressed powder of the Graphene modified by described silane coupler It is sprayed on described sandwich layer, the most thermally treated prepared；The temperature of described heat treatment is preferably 100 DEG C -200℃；The time of described heat treatment is preferably 1-5 hour；The Graphene that described silane coupler is modified The median particle diameter D50 of pressed powder be preferably 10-50nm.
Preferably, the pressed powder of the Graphene that described silane coupler is modified is by silane coupler and oxygen Graphite prepares through reduction reaction；Described silane coupler is for having general formula R2-Si(R1)3、 R2R3-Si(R1)2Compound at least one, wherein, R2、R3The most independent is respectively selected from hydrogen Atom, unsubstituted C1-C6Alkyl；R1It is-OR selected from halogen or formula4Alkoxyl, wherein, Described R4Selected from substituted or unsubstituted C1-C3Alkyl, described substituted C1-C3The replacement of alkyl Base is selected from amino, aminoethyl or sulfydryl.
Preferably, described R2、R3The most independent be respectively selected from methyl, ethyl, vinyl, positive third Base, isopropyl, normal-butyl, isobutyl group, the tert-butyl group, phenyl and cyclohexyl；Described R4Selected from methyl, Ethyl, vinyl, acrylic, aminopropyl, aminoethyl propyl group and mercaptopropyi.
Preferably, in described composite fibre, described clad and sandwich layer mass ratio are 1～2:8～9.
Preferably, the median particle diameter D50 of described composite fibre is 5-90nm, preferably 10-50nm.
Preferably, described composite fibre weight/mass percentage composition in described active material layer is 0.1%～2%.
The application further relates to a kind of lithium ion battery, arranges including anode pole piece, cathode pole piece, interval Barrier film in described anode pole piece and described cathode pole piece and electrolyte；Described cathode pole piece is Front arbitrary described cathode pole piece.
The technical scheme that the application provides can reach following beneficial effect:
When battery charges, composite fibre can firmly be strapped in negative active core-shell material graphite or silicon carbide particles Between, suppression graphite granule or the expansion of silicon carbon material, thus reduce cathode pole piece and expand, and then improve Circulating battery expands.And in cathode size, add high-strength complex condensating fiber, technique is easily controllable, Performance meets requirement, easily realizes industrialization.
Detailed description of the invention
For making the purpose of the application, technical scheme and advantage clearer, real below in conjunction with the present invention Execute example, technical scheme is clearly and completely described, it is clear that described enforcement Example is a part of embodiment of the present invention rather than whole embodiments.The technology provided based on the present invention Scheme and given embodiment, those skilled in the art are institute under not making creative work premise The every other embodiment obtained, broadly falls into the scope of protection of the invention.
A kind of cathode pole piece that the application relates to, including collector and distribution active matter on a current collector Matter layer, described active material layer contains active material and composite fibre；Described active material contains graphite Or at least one in silicon-carbon alloy.When battery charges, composite fibre can firmly be strapped in activity material Between material granule, inhibitory activity material expands, thus reduces cathode pole piece and expand, and then improves battery and follow Ring expands.
In the application negative active core-shell material, in addition at least one in graphite or silicon-carbon alloy, do not arrange Except possibly together with other negative active core-shell material.Particularly, the active material of the application cathode pole piece is graphite Or at least one in silicon-carbon alloy.
General active material layer also includes conductive agent and the binding agent of molding bonded increasing electric conductivity, And graphite or silicon-carbon alloy active material itself i.e. have electric conductivity, therefore can also in active material layer The most additionally add conductive agent；The i.e. active material layer of the application cathode pole piece can include above-mentioned activity Material, composite fibre and binding agent；It is not excluded for comprising other materials.
Further, the active material layer of the application cathode pole piece can be by above-mentioned active material, multiple Condensating fiber and binding agent composition.
As the binding agent of the application cathode pole piece, can be selected for sodium carboxymethyl cellulose (CMC), fourth Mixing of the binding agents, preferably CMC and SBR such as benzene rubber (SBR), acroleic acid resin (PAA) Compound, or the mixture of CMC and PAA.
It is also preferred that the left the weight/mass percentage composition that the application binding agent is in the active material layer of cathode pole piece is 2-6%.
The composite fibre that the application relates to, including sandwich layer and the clad of cladding sandwich layer；Described sandwich layer Material is the intensity fibrous material at 700-2500MPa；Described coating layer material is that silane coupler is repaiied The Graphene of decorations.Because Graphene itself is tough, there is good elasticity and tensile property, so should The composite fibre of clad structure, it is possible to be effectively improved pliability and the tensile property of fiber.
As a kind of improvement of the application, the material of described sandwich layer be aramid fiber, polyethylene fibre or The mixture of the two；Aramid fiber, polyethylene fibre have high intensity, a high-modulus, electrolyte resistance and It is not involved in cell reaction.
It is also preferred that the left the molecular weight of aramid fiber used in this application, polyethylene fibre is 50-140 ten thousand； If molecular weight is too low, poor with Graphene composite effect；If molecular weight is too high, negative plate can be made With the intermembranous bonding tension of isolation, block electrolyte ion path, deteriorate battery core cycle performance；The application Aramid fiber, the molecular weight of polyethylene fibre are maintained at 50-140 ten thousand, not only can guarantee that composite effect but also not Electrolyte ion path can be blocked.
As a kind of improvement of the application, silane coupled in the Graphene that the application silane coupler is modified The ratio of the amount of the material of agent and Graphene is 1～2:9～8.
The application further refers to the preparation method of the Graphene that aforesaid silane coupler is modified, For: under reducing agent existence condition, silane coupler and graphite oxide reduce in reduction solvent Reaction, is then passed through filter, is dried the Graphene pressed powder forming silane coupler modification.Utilize oxygen The features such as great amount of hydroxy group, carboxyl, epoxy radicals are contained on graphite surface, by self with epoxy radicals or its The silane coupler of its organo-functional group is modified oxidized graphite flake layer and reduces, and prepares silane coupler The Graphene modified.
It is also preferred that the left the pressed powder of the Graphene of herein described silane coupler modification is by silane coupled Agent and graphite oxide prepare through reduction reaction；Described silane coupler is for having general formula R2-Si(R1)3、 R2R3-Si(R1)2Compound at least one, wherein, R2、R3The most independent is respectively selected from Hydrogen atom, unsubstituted C1-C6Alkyl, wherein C1-C6Alkyl can be chain-like alkyl, ring Alkyl, chain thiazolinyl or aryl；
Preferably, described R2、R3The most independent it is respectively selected from methyl, ethyl, vinyl, just Propyl group, isopropyl, normal-butyl, isobutyl group, the tert-butyl group, aryl and cyclohexyl；
R1It is-OR selected from halogen or formula4Alkoxyl, wherein halogen preferred chlorine atom；R4It is selected from Substituted or unsubstituted C1-C3Alkyl；Described substituted C1-C3The substituent group of alkyl selected from ammonia Base, aminoethyl or sulfydryl；
Preferably, described R4Selected from methyl, ethyl, vinyl, acrylic, aminopropyl, ammonia second Base propyl group and mercaptopropyi.
Wherein, general formula R2-Si(R1)3、R2R3-Si(R1)2Molecular formula respectively such as formula I and formula II Shown in:
It is also preferred that the left reducing agent is selected from hydrazine hydrate, sodium borohydride, hydrogenation in the aforementioned reduction reaction of the application Aluminum lithium.Wherein hydrazine hydrate is preferred with the advantage such as cheap, reproducibility is strong, reduction effect is obvious.
It is also preferred that the left the application aforementioned reduction solvent selected from water, methanol, ethyl acetate, acetone, DMF, One or more mixing in THK, DMSO, wherein preferably methanol makees reduction solvent, because methanol The edge pattern of Graphene will not be produced serious destruction, and the graphite of high conductivity can be prepared Alkene.
It is also preferred that the left the application aforementioned reduction reaction process, silane coupler, graphite oxide and reduction The ratio of the amount of the material of agent is 1～3:8～6:0.5～1.
As a kind of improvement of the application, the intermediate value grain of the Graphene pressed powder that silane coupler is modified Footpath D50 is 10-50nm.
As a kind of improvement of the application, the moulding process of the application composite fibre is: by silane coupled The Graphene pressed powder that agent is modified is sprayed on sandwich layer, obtains intensity high, pliable and tough after Overheating Treatment Property good and high-strength composite fibrous material that tensile property is good.
As the application one preferably embodiment, the Graphene that silane coupler is modified is sprayed on core After on layer, within 1-5 hour, obtain the complex fiber material of the application 100 DEG C-200 DEG C bakings.
As a kind of improvement of the application, in the application composite fibre, the silane coupler of clad is repaiied The Graphene of decorations and the mass ratio of core fibers material are 1～2:8～9.
As a kind of improvement of the application, the particle diameter D50 of the application composite fibre is 5-90nm, excellent Select 10～50nm；A diameter of the 1 of composite fibre～10nm, preferably 3-4nm；Composite fibre extends Rate is 6%-20%, and elastic recovery rate is 100%.Particle diameter is too small, it is impossible to constraint graphite and silicon-carbon alloy Granule, particle diameter is crossed conference and is destroyed active material；Percentage elongation is too small, battery when discharge and recharge to activity material Material binding force is more weak, excessive then it cannot be guaranteed that 100% elastic recovery.
As a kind of improvement of the application, in the active material layer of the application cathode pole piece, compound fibre The weight/mass percentage composition of dimension is 0.1%～2%；Very few, to active substance constraint deficiency, too much, impact The capacity of negative plate.
As a kind of improvement of the application, the moulding process of the active material layer of the application cathode pole piece For: it is initially formed the negative active material slurry containing active material, then composite fibre is added in batches Entering, stirring makes composite fibre dispersed in negative active material slurry, is then starched by negative electrode active Expect coated, cold moudling.
Further, the moulding process of the active material layer of the application is, by active material and binding agent It is dispersed in dispersant formation negative active material slurry, then composite fibre is dividedly in some parts, stirring Make composite fibre dispersed in negative active material slurry, then by negative electrode active slurry through being coated with Cloth, cold moudling.
The application further relates to a kind of lithium ion battery, arranges including anode pole piece, cathode pole piece, interval Barrier film between anode pole piece and cathode pole piece and electrolyte, wherein cathode pole piece is front arbitrary Described cathode pole piece.
Embodiment 1-4 prepares the composite fibre of the application, takes the silane coupler modification of certain mass Graphene is sprayed on the core fibers material of certain mass, and then baking obtains the application high intensity Complex fiber material；Preparation parameter is as shown in table 1, and the correlation performance parameters of the composite fibre prepared is such as Shown in table 2.
Preparing as a example by aramid fiber and Graphene high-strength composite cellulosic by embodiment 1, it was prepared Journey particularly as follows: by 5g vinyl trichlorosilane modify Graphene be sprayed on 20g aramid fiber, And through 170 DEG C baking 4h, prepared D50 be 20-25nm, a diameter of 3-4nm, percentage elongation 6%, Time elastic recovery rate be 100% high-strength composite fibrous material.
(aramid fiber, polyethylene fibre molecular weight are in table 1 embodiment 1-4 composite fibre preparation parameter list 50-140 ten thousand, the Graphene median particle diameter D50 that silane coupler is modified is 10-50nm)
The capabilities list of table 2 embodiment 1-4 composite fibre
Numbering Particle diameter D50 Diameter Percentage elongation Elastic restoration ratio
Embodiment 1 20-25nm 3-4nm 6% 100%
Embodiment 2 30-35nm 9-10nm 6% 100%
Embodiment 3 30-35nm 6-7nm 6% 100%
Embodiment 4 25-40nm 3-8nm 20% 100%
Embodiment 5-16 and comparative example 1-2, use the complex fiber material system that embodiment 1-4 prepares Standby cathode pole piece, the binding agent of the negative active core-shell material and certain mass that take certain mass mixes, then Adding the composite fibre of certain mass in three batches, high-speed stirred is uniformly coated on copper after being uniformly dispersed The two sides of paper tinsel, obtains cathode pole piece through colding pressing.Cathode pole piece preparation parameter of being correlated with is as shown in table 3.
Prepare anode pole piece: by positive electrode active materials LiCoO2, binding agent PVDF, conductive carbon (SP) It is dissolved in solvent N-methyl pyrilidone (NMP) stirring according to mass ratio 96:2:2 and makes slurry Material, is uniformly coated on plus plate current-collecting body aluminium foil, makes the anode pole piece of lithium ion battery after drying. Then the cathode pole piece this anode pole piece, pp barrier film, the application prepared is around being rolled into battery core, then by electricity Core is put in packaging bag, injects nonaqueous electrolytic solution, obtains the embodiment of the present application 5-16 and right after encapsulation The lithium ion battery of ratio 1-2.
Table 3 embodiment 5-16 and the cathode pole piece preparation parameter list of comparative example 1-2
The lithium ion battery preparing the embodiment of the present application 5-16 and comparative example 1-2 carries out coulomb effect first Rate (discharge capacity and the ratio of initial charge capacity first) is tested, and test process is: 0.7C is permanent Current charge is discharged to 3.0V to 4.4V, 4.4V constant-voltage charge to 0.025C, 1C, and test result is such as Shown in table 4 and table 5.
The original depth of the cathode pole piece of embodiment 5-16 and comparative example 1-2, is designated as d1, at electricity Pond is completely filled after circulating with 200 times, disassembles battery, takes out cathode pole piece, measures and completely fill and 200 Cathode pole piece thickness after secondary circulation, is designated as d2 and d3, calculates cathode pole piece and completely fills and 200 circulations Rear expansion rate；Completely fill thickness swelling: (d2-d1)/d1*100%, thickness swelling after 200 circulations Rate: (d3-d1)/d1*100%, acquired results be shown in Table 4 and table 5 shown in.
Table 4 negative active core-shell material is embodiment and the comparative example test result list of graphite
Numbering Coulombic efficiency first Completely fill thickness swelling 200 circulation thickness swellings
Embodiment 5 92.0% 18% 39%
Embodiment 7 91.0% 17% 36%
Embodiment 9 91.5% 19% 38%
Embodiment 11 93.0% 18% 40%
Embodiment 12 93.5% 17% 35%
Embodiment 15 93.6% 16% 35%
Comparative example 1 92.0% 23% 49%
Table 5 negative active core-shell material is embodiment and the comparative example test result list of silicon-carbon alloy
Numbering Coulombic efficiency first Completely fill thickness swelling 200 circulation thickness swellings
Embodiment 6 86.0% 32% 38%
Embodiment 8 85.5% 35% 37%
Embodiment 10 84.5% 37% 35%
Embodiment 13 84.0% 36% 38%
Embodiment 14 84.5% 35% 39%
Embodiment 16 84.7% 33% 40%
Comparative example 2 85.0% 85% 60%
Cathode pole piece is during embedding lithium ion, and negative active core-shell material graphite, carbon silicon grain occur bigger Rotating, in cyclic process, binding agent is tired, weakens active material graphite, the constraint of carbon silicon grain, And then causing bigger negative plate to expand, the application adds high-strength composite in negative electrode active material layer Fiber, in charge and discharge process, it is possible to constraint active material particle, stops particle rotation, thus drops Low negative plate expands.From table 4 with table 5 it can be seen that embodiments herein 5-16 compares comparative example 1-2 does not contains the battery of composite fibre negative plate composition, completely fills pole piece expansion after circulating with 200 and obtains Substantially suppression.
Although the application is open as above with preferred embodiment, but is not for limiting claim, appoint What those skilled in the art, on the premise of conceiving without departing from the application, can make some possible Variation and amendment, the scope that therefore protection domain of the application should be defined with the application claim It is as the criterion.

Claims (10)

1. a cathode pole piece, including collector and distribution active material layer on a current collector, it is special Levying and be, described active material layer contains active material and composite fibre；Described active material includes stone At least one in ink or silicon-carbon alloy.
Cathode pole piece the most according to claim 1, it is characterised in that described composite fibre includes Sandwich layer and the clad of the described sandwich layer of cladding；The material of described sandwich layer is that intensity is 700-2500MPa's Fibrous material；Described coating layer material is the Graphene that silane coupler is modified.
Cathode pole piece the most according to claim 2, it is characterised in that the material of described sandwich layer is Aramid fiber, polyethylene fibre or the mixture of the two；Described aramid fiber, polyethylene fibre point Son amount is preferably 50-140 ten thousand.
Cathode pole piece the most according to claim 2, it is characterised in that described composite fibre is will The pressed powder of the Graphene that described silane coupler is modified is sprayed on described sandwich layer, the most again through heat Process and prepare；The temperature of described heat treatment is preferably 100 DEG C-200 DEG C；The time of described heat treatment is preferred For 1-5 hour；The median particle diameter D50 of the pressed powder of the Graphene that described silane coupler is modified is preferred For 10-50nm.
Cathode pole piece the most according to claim 4, it is characterised in that described silane coupler is repaiied The pressed powder of the Graphene of decorations is prepared through reduction reaction by silane coupler and graphite oxide；Described silicon Alkane coupling agent is for having general formula R2-Si(R1)3、R2R3-Si(R1)2Compound at least one, wherein, R2、R3The most independent is respectively selected from hydrogen atom, unsubstituted C1-C6Alkyl；R1Selected from halogen or Formula is-OR4Alkoxyl, wherein, described R4Selected from substituted or unsubstituted C1-C3Alkyl, institute State substituted C1-C3The substituent group of alkyl selected from amino, aminoethyl or sulfydryl.
Cathode pole piece the most according to claim 5, it is characterised in that described R2、R3The most solely Vertical be respectively selected from methyl, ethyl, vinyl, n-pro-pyl, isopropyl, normal-butyl, isobutyl group, The tert-butyl group, phenyl and cyclohexyl；Described R4Selected from methyl, ethyl, vinyl, acrylic, ammonia third Base, aminoethyl propyl group and mercaptopropyi.
Cathode pole piece the most according to claim 2, it is characterised in that in described composite fibre, Described clad and sandwich layer mass ratio are 1～2:8～9.
Cathode pole piece the most according to claim 1, it is characterised in that in described composite fibre Value particle diameter D50 is 5-90nm, preferably 10-50nm.
Cathode pole piece the most according to claim 1, it is characterised in that described composite fibre is in institute Stating the weight/mass percentage composition in active material layer is 0.1%～2%.
10. a lithium ion battery, including anode pole piece, cathode pole piece, be arranged at intervals at described just Barrier film in pole pole piece and described cathode pole piece and electrolyte；It is characterized in that, described negative pole pole Sheet is the arbitrary described cathode pole piece of claim 1-9.
CN201610456894.4A 2016-06-22 2016-06-22 A kind of cathode pole piece and lithium ion battery Active CN106025176B (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109346696A (en) * 2018-10-11 2019-02-15 桑德集团有限公司 Silicon-carbon cathode material and preparation method thereof
WO2023041063A1 (en) * 2021-09-17 2023-03-23 华为技术有限公司 Composite electrode material and preparation method therefor, lithium battery and electronic device
JP7469069B2 (en) 2020-02-25 2024-04-16 帝人株式会社 Electrode sheet and its manufacturing method

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5497109B2 (en) * 2012-07-03 2014-05-21 昭和電工株式会社 Composite carbon fiber

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109346696A (en) * 2018-10-11 2019-02-15 桑德集团有限公司 Silicon-carbon cathode material and preparation method thereof
JP7469069B2 (en) 2020-02-25 2024-04-16 帝人株式会社 Electrode sheet and its manufacturing method
WO2023041063A1 (en) * 2021-09-17 2023-03-23 华为技术有限公司 Composite electrode material and preparation method therefor, lithium battery and electronic device

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