CN104882631A - Method for improving uniform heat dispersion performance of lithium ion battery electrode piece - Google Patents

Method for improving uniform heat dispersion performance of lithium ion battery electrode piece Download PDF

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Publication number
CN104882631A
CN104882631A CN201510223913.4A CN201510223913A CN104882631A CN 104882631 A CN104882631 A CN 104882631A CN 201510223913 A CN201510223913 A CN 201510223913A CN 104882631 A CN104882631 A CN 104882631A
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China
Prior art keywords
battery
graphite paper
flexible graphite
lithium ion
lithium
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CN201510223913.4A
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Chinese (zh)
Inventor
曹殿学
邢涛
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HARBIN TIANBAO GRAPHITE TECHNOLOGY DEVELOPMENT Co Ltd
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HARBIN TIANBAO GRAPHITE TECHNOLOGY DEVELOPMENT Co Ltd
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Priority to CN201510223913.4A priority Critical patent/CN104882631A/en
Publication of CN104882631A publication Critical patent/CN104882631A/en
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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
    • 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
    • H01M4/64—Carriers or collectors
    • H01M4/66—Selection of materials
    • H01M4/663—Selection of materials containing carbon or carbonaceous materials as conductive part, e.g. graphite, carbon fibres
    • 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 discloses a method for improving a uniform heat dispersion performance of a lithium ion battery electrode piece, relates to methods for uniform heat dispersion performances of battery electrode pieces and solves the problem that a heat-conducting performance of the plane of a conventional metal current collector adopted in a lithium ion battery is poor, so that the local overheating of an electrode in the charging and discharging processes occurs, and further battery bloating is caused and the service life of the battery is shortened in the prior art. The method has the characteristics that flexible graphite paper is used for replacing an aluminum foil and a copper foil in the lithium ion battery to be used as an electrode material active substance-loaded current collector; and heat at heat points of the electrode piece can be fast and uniformly dispersed by using the high heat-conducting performance of the flexible graphite paper, so that the heat points can be removed, the temperature of a battery cell is uniformly distributed, and further electrolyte decomposing, battery service life shortening and battery damage caused by the local overheating of the battery core can be avoided. The electrochemistry unreactiveness of the flexible graphite paper and the condition that the flexible graphite paper can not react with lithium ions and the electrolyte during over-charging and over-discharging are used, so that the service life of the battery is prolonged, and the safety of the battery is improved; and the method is used in the field of the batteries.

Description

A kind of method improving electrodes of lithium-ion batteries Homogeneouslly-radiating performance
Technical field
The present invention relates to a kind of method of battery pole piece Homogeneouslly-radiating performance.
Background technology
Along with the lightening of electronics industry and flexibleization, in order to obtain having the energy-storage travelling wave tube of more high-energy-density density, specific power density, people have not tightly been confined to the aspects such as the positive and negative pole material of battery, electrolyte and barrier film for the research emphasis of lithium ion battery, and collector also result in extensive concern as the conductive network supporting active material.
The general demand fulfillment of collector as lithium ion battery active material: 1, have certain mechanical strength is light weight, thin; 2, in the electrolytic solution chemistry and electrochemical stability; 3, good conductivity and thermal conductivity is had.
At present, conventional in the organic system of lithium ion battery collector is Copper Foil and aluminium foil.The machining property of the two meets the requirement of battery afflux liquid substantially, and at LiPF 6organic system in solubility little, have good stability.But in the production of reality is used, be but subject to a lot of restriction: when battery operating voltage is lower aluminium foil easily and lithium metal form intermetallic compound, cause irreversible loss, affect the performance of specific capacity; When operating voltage is higher, Copper Foil, aluminium foil are all easily oxidized, and surface forms fine and close oxide-film, even oxide etch occurs, affects conductivity; During machining, easily jagged, pierce through barrier film, cause short circuit.The more important thing is that battery core can heat release in charge and discharge process, when electrode material coating occurs at uneven, due to copper and aluminium collector plane thermal conductivity performance not good, heat release can cause local temperature too high, produce focus, cause battery core thermal runaway, thus damage battery or reduce useful life.In addition, the appearance of and flexible electronic product large along with pliability, traditional collector can not satisfy the demands because mechanical flexibility is poor.
Therefore, for lithium ion battery, find a kind ofly can fast the heat that local produces is distributed uniformly rapidly thus eliminate the method for focus, to the raising fail safe of battery and extending battery life most important.
Flexible graphite paper suppresses after strict chemical treatment and heat treatment with pure Natural Flake Graphite raw material.The graphite paper be processed to form is also lighter than graphite raw material, and density is probably 1.0g/cm 3-1.8g/cm 3, lighter than aluminium by 25%, lighter than copper by 75%.Have excellent thermal endurance and cold resistance, the high temperature from the ultralow temperature of-270 degree to 3650 degree (non-oxide systems), its physical property does not almost have anything to change, in atmosphere can resistance to 450 degree of high temperature yet.There are excellent chemically-resistant, electrochemical corrosion performance.Good conductivity, resistivity is low.In-plane thermal conductivity can reach 1200W/mK, and heat conduction is even, can focus is being subject to along XY both direction uniform heat conduction.Process velocity is fast, can smoothly be attached to any surface and curved surface, change shape, thickness according to demand.Environmental friendliness, easily reclaims.This makes flexible graphite paper be expected to become a kind of novel lithium ion battery electrode material collector.
Summary of the invention
The present invention will solve current lithium ion battery to adopt the plane thermal conductivity performance of conventional metals collector not good, electrode in charge and discharge process is caused to occur the problem that local overheating causes battery flatulence and life-span to decline providing a kind of method improving electrodes of lithium-ion batteries Homogeneouslly-radiating performance.
The present invention improves the method for electrodes of lithium-ion batteries Homogeneouslly-radiating performance, in lithium ion battery, specifically uses ultrathin flexible graphite paper to substitute aluminium foil and Copper Foil, as the collector of carrying electrode materials active material.
The thickness of described flexible graphite paper is 0.01 ~ 1.0mm.
By active material, (described active material is Li 4ti 5o 12or LiFePO 4), acetylene black and Kynoar PVDF in mass ratio 8:1:1 mixed by magnetic agitation, make paste body shape.The body of paste spreader stirred is coated on flexible graphite paper, the body of paste thickness of coating is 20 ~ 500 μm, (vacuum drying temperature is 80 ~ 120 DEG C in vacuumize, drying time is 12 ~ 24h), take out after dry and suppress 40s under 6 ~ 8MPa, thus obtain lithium ion battery electrode piece.
The plane thermal conductivity performance that instant invention overcomes conventional metals collector is not good, thus causes electrode in charge and discharge process to occur the problem that local overheating (focus) causes battery flatulence and life-span to decline; Solve the metal collector used at present easily to produce burr and pierce through barrier film simultaneously, and the problem such as metal collector generation electrochemical reaction during super-charge super-discharge; In addition the proportion of new collector is little by metal collector, thus can improve the specific energy of battery.
Essence of the present invention adopts flexible graphite paper replacement traditional C u and Al paper tinsel as collector, prepare negative plate and the positive plate of lithium ion battery, thus prepare metal-free lithium ion battery, utilize the high-termal conductivity of flexible graphite paper, when eliminating battery charging and discharging, produce the problem of focus.
Beneficial effect of the present invention:
(1) flexible graphite paper light weight, is conducive to the specific energy improving energy-storage travelling wave tube.Machining property is good, can not generate burr and pierce through barrier film.Mechanical flexibility is good, can do the processing of any form according to demand.
(2) flexible graphite paper has high thermal conductivity, more effective than copper, aluminum material, even if the inner each small monomer battery core temperature of energy storage device also can be made during super-charge super-discharge to reach balanced as far as possible, improve battery core Temperature Distribution, eliminate hot spot region, increase the service life.
(3), can not there is oxide etch when operating voltage is higher, also can not form irreversible intermetallic compound with lithium when operating voltage is lower in flexible graphite paper chemistry and stable electrochemical property in organic electrolyte system.The voltage range that can bear is comparatively large, and overcharging resisting is crossed and put.
(4) after flexible graphite paper alternative metals collector, not containing metal material in lithium ion battery, be easy to reclaim electrode active material, simplify battery recycling technique, reduce waste and old ion battery processing cost.
Accompanying drawing explanation
Fig. 1 be in embodiment 1 respectively with graphite paper and Al paper tinsel for collector is coated with coated positive pole material LiFePO 4make the CV resolution chart of pole piece assembling lithium ion battery; Fig. 2 be respectively with graphite paper and Al paper tinsel for collector is coated with coated positive pole material LiFePO 4make the constant current charge-discharge resolution chart of pole piece assembling lithium ion battery; Fig. 3 be respectively with graphite paper and Al paper tinsel for collector is coated with coated positive pole material LiFePO 4make the EIS collection of illustrative plates of pole piece assembling lithium ion battery; Fig. 4 be respectively with graphite paper and Al paper tinsel for collector coating negative material Li 4ti 5o 12make the CV resolution chart of pole piece assembling lithium ion battery; Fig. 5 be respectively with graphite paper and Al paper tinsel for collector coating negative material Li 4ti 5o 12do the constant current charge-discharge test of pole piece assembling lithium ion battery; Fig. 6 is that the constant current charge-discharge making pole piece assembling lithium ion battery with graphite paper and Cu paper tinsel for collector coating negative material graphite is respectively tested; Fig. 7 is the temperature profile preparing soft-package battery using Copper Foil, aluminium foil as both positive and negative polarity collector; Fig. 8 is the temperature profile preparing soft-package battery using graphite paper as collector.
Embodiment
Technical solution of the present invention is not limited to following cited embodiment, also comprises the combination in any between each embodiment.
Embodiment one: present embodiment improves the method for electrodes of lithium-ion batteries Homogeneouslly-radiating performance, specifically uses flexible graphite paper to substitute aluminium foil and Copper Foil, as the collector of carrying electrode materials active material in lithium ion battery.
Present embodiment utilizes ultrathin flexible graphite paper as the collector of lithium ion cell positive and negative pole, realizes the comprehensive replacement to metal collector such as traditional Copper Foil and aluminium foils.Utilize ultrathin flexible graphite paper at the heat conductivility of plane xy direction superelevation, the heat at electrode slice focus place when discharge and recharge is scatter rapidly uniformly, thus elimination focus, arrive the object of battery core homogeneous temperature distribution, thus avoid battery core local overheating to cause electrolyte decomposition, shorter battery life and cell damage.Meanwhile, utilize the electrochemicaUy inert of ultrathin flexible graphite paper and with during super-charge super-discharge and lithium ion and electrolyte do not react, thus extend the useful life of battery, and improve the fail safe of battery.In addition, ultrathin flexible graphite paper density, lower than copper and aluminium, therefore can improve battery quality specific energy, and is beneficial to the recovery of old and useless battery.
Embodiment two: present embodiment and embodiment one unlike: the thickness of described flexible graphite paper is 0.01 ~ 1.0mm.Other is identical with embodiment one.
Embodiment three: present embodiment and embodiment one unlike: the thickness of described flexible graphite paper is 0.015 ~ 0.025mm.Other is identical with embodiment one.
Embodiment four: present embodiment and embodiment one unlike: the thickness of described flexible graphite paper is 0.025 ~ 0.07mm.Other is identical with embodiment one.
Embodiment five: one of present embodiment and embodiment one to four are the flexible compound graphite paper that flexible compound graphite paper, Graphene and synthetic fabrics that flexible graphite paper, graphite and synthetic fabrics compound prepared by flexible graphite paper, Prof. Du Yucang graphite prepared by native graphite are formed are formed unlike: described flexible graphite paper, described synthetic fabrics is that polypropylene, polyethylene, polypropylene are fine, polyamide or polyester.Other is identical with one of embodiment one to four.
The method that graphite described in present embodiment and synthetic fabrics compound form flexible compound graphite paper is existing conventional method, and the method that Graphene and synthetic fabrics form flexible compound graphite paper is existing conventional method.
Embodiment six: one of present embodiment and embodiment one to five are lithium ion battery positive electrode used and negative material unlike: described active material.Other is identical with one of embodiment one to five.
Electrode material activity material comprises various positive electrodes (as LiFePO4, LiMn2O4, cobalt acid lithium, ternary material etc.) and the various negative material (as Delanium, native graphite, carbonaceous mesophase spherules, lithium titanate, silicon, silicon-carbon alloy etc.) of lithium ion battery.
Embodiment seven: one of present embodiment and embodiment one to six unlike: described active material is Li 4ti 5o 12and LiFePO 4.Other is identical with one of embodiment one to six.
For verifying beneficial effect of the present invention, carry out following experiment:
First to be coated in the LiFePO on flexible graphite paper 4and Li 4ti 5o 12form positive pole and the negative pole of lithium ion battery respectively, assembling CR2032 half-cell carries out charge-discharge test; Then the Li will be coated in respectively on flexible graphite paper 4ti 5o 12and LiFePO 4respectively as negative pole and positive pole, the soft-package battery being assembled into 5A/h carries out charge-discharge test.Testing flexible graphite paper used is flexible graphite paper prepared by native graphite.
Embodiment 1:
The present embodiment is by LiFePO 4be coated in Al paper tinsel respectively and thickness is on the flexible graphite paper of 0.03mm, concrete grammar is: by active material LiFePO 4, acetylene black and Kynoar PVDF in mass ratio 8:1:1 mixed by magnetic agitation, make paste body shape.Be coated on Al paper tinsel and graphite paper by the body of paste spreader stirred, the body of paste thickness of coating is 15 μm, vacuumize, dry temperature is 100 DEG C, drying time is 18h, takes out and suppress 40s under 7MPa, thus obtain two kinds of positive plates of Al paper tinsel and graphite paper after dry.
(1) the positive plate assembling CR2032 type half-cell obtained carries out cyclic voltammetry.Sweep speed is 0.5mVs -1, scanning voltage scope is 2.5 ~ 4.2V, and as shown in Figure 1, in Fig. 1, a is LEP-graphite paper to test result, and b is LEP-aluminium foil.Near 3.65V and 3.23V, occur redox peak respectively with the CV curve that Al paper tinsel prepares electrode as collector, potential difference is 0.42V, and peak current is 5.15mA; During using flexible graphite paper as collector, redox peak appears at 3.55V and 3.32V respectively, and potential difference is 0.23V, and peak current is 5.45mA.Visible take graphite paper as the electrode of collector, and its electrochemical polarization is less than Al paper tinsel collector, is beneficial to the raising of battery performance.
(2) the positive plate assembling CR2032 half-cell obtained carries out constant current charge-discharge test, result as shown in Figure 2, in Fig. 2, zero is LEP-graphite paper, ● be LEP-aluminium foil, with Al paper tinsel as collector prepare electrode specific capacity when 0.5C, 1C, 5C, 10C, 20C, 0.5C discharge be respectively 123.4,113.9,86.9,69.9,50.5,127.1mAhg -1; With flexible graphite paper as collector prepare the specific discharge capacity of electrode under corresponding multiplying power be respectively 125.6,118.9,91.9,75.7,63.8,126.9mAhg -1, be that the specific discharge capacity of the electrode of collector is a little more than Al paper tinsel collector as seen with graphite paper.
(3) the positive plate assembling CR2032 half-cell obtained carries out ac impedance measurement.Test voltage is open circuit voltage, and operating frequency range is 10mHz ~ 100kHz, and disturbance is 5mV.Test result as shown in Figure 3, is prepared as collector the charge-transfer resistance that electrode records with Al paper tinsel and is approximately 42 Ω; Prepare as collector about 25 Ω of charge-transfer resistance that electrode records with flexible graphite paper paper tinsel, the resistance of visible graphite paper collector is lower.
Embodiment 2:
The present embodiment is by Li 4ti 5o 12be coated in Al paper tinsel respectively and flexible thickness is on the graphite paper of 0.03mm, concrete grammar is: by active material Li 4ti 5o 12, acetylene black and Kynoar PVDF in mass ratio 8:1:1 mixed by magnetic agitation, make paste body shape.Be coated on Al paper tinsel and graphite paper by the body of paste spreader stirred, the body of paste thickness of coating is 15 μm, vacuumize, dry temperature is 100 DEG C, drying time is 18h, takes out and suppress 40s under 7MPa, thus obtain two kinds of negative plates of Al paper tinsel and graphite paper after dry.
(1) the negative plate assembling CR2032 half-cell obtained carries out cyclic voltammetry.Sweep speed is 0.5mVs-1, and scanning voltage scope is 1.0 ~ 2.5V, and as shown in Figure 4, in Fig. 4, a is LEP-graphite paper to test result, and b is LEP-aluminium foil.Near 1.75V and 1.42V, occur redox peak respectively with the CV curve that Al paper tinsel prepares electrode as collector, potential difference is 0.33V, and peak current is 5.5mA; During using flexible graphite paper as collector, redox peak appears near 1.68V and 1.48V respectively, and potential difference is 0.2V, and peak current is 8.49mA, is that the electrochemical polarization of the negative pole of collector is less than Al paper tinsel collector as seen with graphite paper.
(2) the negative plate assembling CR2032 half-cell obtained carries out constant current charge-discharge test, and as shown in Figure 5, in Fig. 5, zero is LEP-graphite paper to result, ● be LEP-aluminium foil.With Al paper tinsel as collector prepare electrode specific capacity when 0.5C, 1C, 5C, 10C, 20C, 0.5C discharge be respectively 160.9,146.8,97.6,73.9,53.2,155.9mAhg -1, when larger multiplying power, decay is more serious; With flexible graphite paper as collector prepare the specific discharge capacity of electrode under corresponding multiplying power be respectively 162.8,153.9,109.2,84.9,67.8,161.8mAhg -1.Visible when taking graphite paper as collector, Li 4ti 5o 12the specific discharge capacity of negative pole is higher than Al collector.
Embodiment 3:
Spherical graphite negative material be coated in respectively on Copper Foil and graphite paper, the negative plate assembling CR2032 half-cell obtained carries out constant current charge-discharge test at 0.5C, and as shown in Figure 6, in Fig. 6, zero is graphite-graphite paper, ● be graphite-aluminium foil.Visible is that the cyclical stability of the graphite cathode of collector is slightly better than Al collector with graphite paper.
By the half-cell test specification of above-mentioned example, be that the positive pole of the lithium ion battery of collector and the chemical property of negative pole are all better than or are equivalent to Al and Cu paper tinsel collector with flexible graphite paper, prove that flexible graphite paper can substitute aluminium foil and Copper Foil completely.
Embodiment 4:
In order to the thermolysis of flexible graphite paper collector is described, prepare the LiFePO of 10Ah using flexible graphite paper as both positive and negative polarity collector with using copper clad aluminum as both positive and negative polarity collector respectively 4/ Li 4ti 5o 12soft-package battery, compares its heat dispersion.As shown in Figure 7 and Figure 8, just very Al collector in Fig. 7, negative pole is Cu collector, in Fig. 8, both positive and negative polarity is flexible graphite paper collector, under the ambient temperature of 23 DEG C, circulating after 10 times under 5C, there is notable difference in two battery temperatures distributions, using flexible graphite paper as the battery temperature of both positive and negative polarity afflux distribution all with, the temperature difference is no more than 9 DEG C.And using aluminium foil as the battery temperature difference of both positive and negative polarity collector up to 20 DEG C.Therefore, the soft-package battery uniformity of temperature profile using flexible graphite paper as collector, there will not be local overheating phenomenon.For lithium titanate battery, this point is particularly important, and the high-termal conductivity of flexible graphite makes internal temperature of battery be evenly distributed, and without local overheating, this will greatly reduce inflatable and high-temperature behavior decline problem that lithium titanate battery localized hyperthermia causes.

Claims (6)

1. improve a method for electrodes of lithium-ion batteries Homogeneouslly-radiating performance, it is characterized in that the method specifically uses flexible graphite paper to substitute aluminium foil and Copper Foil, as the collector of carrying electrode materials active material in lithium ion battery.
2. a kind of method improving electrodes of lithium-ion batteries Homogeneouslly-radiating performance according to claim 1, is characterized in that the thickness of described flexible graphite paper is 0.01 ~ 1.0mm.
3. a kind of method improving electrodes of lithium-ion batteries Homogeneouslly-radiating performance according to claim 1, is characterized in that the thickness of described flexible graphite paper is 0.015 ~ 0.025mm.
4. a kind of method improving electrodes of lithium-ion batteries Homogeneouslly-radiating performance according to claim 1, is characterized in that the thickness of described flexible graphite paper is 0.025 ~ 0.07mm.
5. a kind of method improving electrodes of lithium-ion batteries Homogeneouslly-radiating performance according to claim 1 and 2, it is characterized in that described flexible graphite paper is the flexible compound graphite paper that flexible compound graphite paper, Graphene and synthetic fabrics that flexible graphite paper, graphite and synthetic fabrics compound prepared by flexible graphite paper, Prof. Du Yucang graphite prepared by native graphite are formed are formed, described synthetic fabrics be that polypropylene, polyethylene, polypropylene are fine, polyamide or polyester.
6. a kind of method improving electrodes of lithium-ion batteries Homogeneouslly-radiating performance according to claim 5, is characterized in that described active material is lithium ion battery positive electrode used and negative material.
CN201510223913.4A 2015-05-05 2015-05-05 Method for improving uniform heat dispersion performance of lithium ion battery electrode piece Pending CN104882631A (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106876773A (en) * 2017-03-10 2017-06-20 扬州大学 Graphite paper is the zinc/aniline and 5 aminosalicyclic acid copolymer secondary cells of collector
CN107359352A (en) * 2017-06-13 2017-11-17 中国科学技术大学 A kind of negative electrode of lithium ion battery electrode slice and preparation method thereof and lithium ion battery
CN105977495B (en) * 2016-05-11 2018-09-04 中国东方电气集团有限公司 A kind of preparation method of affluxion body in lithium ion batteries graphite paper
CN109950543A (en) * 2017-12-20 2019-06-28 天津国安盟固利新材料科技股份有限公司 It is a kind of suitable for the collector of lithium ion battery electrode material and its preparation and application
CN114730887A (en) * 2020-08-31 2022-07-08 宁德时代新能源科技股份有限公司 Positive current collector, positive pole piece, battery module, battery pack and device containing positive current collector

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US4125682A (en) * 1976-10-22 1978-11-14 Compagnie General D'electricite Sodium-sulphur electric cell
CN101339996A (en) * 2007-07-06 2009-01-07 李瑶 Backbone of chargeable battery electrode
CN103825011A (en) * 2014-02-28 2014-05-28 苏州路特新能源科技有限公司 Preparation method of tin of lithium ion battery and conductive polymer composite cathode material membrane

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4125682A (en) * 1976-10-22 1978-11-14 Compagnie General D'electricite Sodium-sulphur electric cell
CN101339996A (en) * 2007-07-06 2009-01-07 李瑶 Backbone of chargeable battery electrode
CN103825011A (en) * 2014-02-28 2014-05-28 苏州路特新能源科技有限公司 Preparation method of tin of lithium ion battery and conductive polymer composite cathode material membrane

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105977495B (en) * 2016-05-11 2018-09-04 中国东方电气集团有限公司 A kind of preparation method of affluxion body in lithium ion batteries graphite paper
CN106876773A (en) * 2017-03-10 2017-06-20 扬州大学 Graphite paper is the zinc/aniline and 5 aminosalicyclic acid copolymer secondary cells of collector
CN107359352A (en) * 2017-06-13 2017-11-17 中国科学技术大学 A kind of negative electrode of lithium ion battery electrode slice and preparation method thereof and lithium ion battery
CN109950543A (en) * 2017-12-20 2019-06-28 天津国安盟固利新材料科技股份有限公司 It is a kind of suitable for the collector of lithium ion battery electrode material and its preparation and application
CN109950543B (en) * 2017-12-20 2021-08-24 天津国安盟固利新材料科技股份有限公司 Current collector suitable for lithium ion battery electrode material and preparation and application thereof
CN114730887A (en) * 2020-08-31 2022-07-08 宁德时代新能源科技股份有限公司 Positive current collector, positive pole piece, battery module, battery pack and device containing positive current collector
CN114730887B (en) * 2020-08-31 2023-12-26 宁德时代新能源科技股份有限公司 Positive electrode current collector, positive electrode plate containing same, battery module, battery pack and device

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