CN101958418A - Electrode current collector material of lithium ion battery and preparation method thereof - Google Patents
Electrode current collector material of lithium ion battery and preparation method thereof Download PDFInfo
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- CN101958418A CN101958418A CN2010101174233A CN201010117423A CN101958418A CN 101958418 A CN101958418 A CN 101958418A CN 2010101174233 A CN2010101174233 A CN 2010101174233A CN 201010117423 A CN201010117423 A CN 201010117423A CN 101958418 A CN101958418 A CN 101958418A
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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
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Abstract
The invention provides an electrode current collector material of a lithium ion battery and a method for preparing the material. The method comprises the following steps of: coating a carbon layer on the surface of a copper foil or an aluminum foil, wherein the thickness of the coated carbon layer is 0.003-0.015mm; and depositing the carbon layer on the surface of the copper foil or the aluminum foil by utilizing a physical vapor deposition method, and then carrying out thermal treatment. While ensuring the conductive property of the material as a current collector, the material improves the chemical property of easy oxidization of the foil in the working process of the battery, enhances the corrosion resisting property of the foil, and can effectively prevent a metal dendritic crystal produced by the lithium ion battery in the working process due to reaction, increase the safety performance of the battery, reduce the internal resistance of the battery and effectively prolong the service life of the battery. The process has the advantages of low temperature, less distortion and damage on the material, low energy consumption, less pollution and lower cost.
Description
Technical field
The present invention relates to battery electrode current collector material and preparation method, particularly the electrode current collecting body material and the preparation method of lithium ion battery.
Background technology
The electrode current collecting body material of present lithium ion battery, negative pole generally adopts metal copper foil, the anodal general metal aluminum foil that adopts, to increase electric conductivity, but in the battery practical work process, be easy to the metallic dendrite identical of growing, cause bigger harm on the one hand the security performance of battery with plate material at metal copper foil or aluminium foil surface, then shortened the useful life of the electrode of lithium ion battery on the other hand, therefore limited its application in the electrokinetic cell field.
Summary of the invention
The present invention aims to provide a kind of formation that can effectively prevent the pole plate place metallic dendrite of lithium ion battery, thereby promotes battery safety, reduces the internal resistance of battery, improves the current collector material of battery performance in useful life, and the method for this material of preparation is provided.
The present invention adopts following scheme to realize:
The electrode current collecting body material of lithium ion battery, at metal copper foil or/and the surface of aluminium foil is covered with carbon-coating; The thickness of surface carbon-coating is 0.003～0.015mm.
The electrode current collecting body material of above-mentioned lithium ion battery adopts following method to prepare: adopt physical gas-phase deposite method at metal copper foil or aluminium foil surface deposition carbon-coating, physical gas-phase deposite methods such as magnetron sputtering technique, ion beam sputtering deposition, radio frequency sputter all can.
Described physical gas-phase deposite method preferably adopts magnetron sputtering technique.
The magnetron sputtering technique condition is: be sputtering target with the graphite target, Copper Foil or aluminium foil are the sputter base material, charge into argon gas, operating room's vacuum degree (1.0～3.0) * 10
-2Pa, sputtering power 2～5Kw, the distance between sputtering target and the base material is 40～80mm, the walking speed 10～30m/min of base material.
Cover carbon-coating and combine tightr with matrix Copper Foil or aluminium foil layer for making to improve the physical property of material, behind the deposit carbon layer process, heat-treat again, a kind of in the following manner selected in heat treatment for use: the one, the atmosphere of reducible metal is arranged in the heat-treatment furnace, be to feed the gas that metal is had reduction in the heat treated stove, as the mist of hydrogen, nitrogen or only be hydrogen; The 2nd, adopt vacuum heat-treating method.
Heat treatment temperature is 300～600 ℃, is incubated 4～10 hours.
Compared with prior art, beneficial effect of the present invention is embodied in:
(1) the present invention is prepared when covering carbon Copper Foil or aluminium foil and guaranteed the electric conductivity of Copper Foil or aluminium foil, has improved foil is easy to oxidation in battery operated process chemical characteristic, has improved the corrosion resisting property of foil.
(2) the present invention is prepared covers the metallic dendrite that carbon Copper Foil or aluminium foil can effectively stop lithium ion battery to be produced because of reaction in the course of the work, can strengthen the work safety of lithium ion battery, reduce the internal resistance of cell, effectively increased lithium ion battery useful life.
(3) the preferred magnetron sputtering technique of the present invention deposition graphite linings, other physical gas-phase deposite method relatively, the one, this technological temperature is low to be destroyed for a short time to material deformation, and material property is better; The 2nd, this process energy consumption is low, pollution is little, cost is lower.
Description of drawings
Fig. 1: battery circulation volume rate of descent contrast test result
Fig. 2: internal resistance of cell contrast test result
Fig. 3: the battery gram holds amount is compared test result.
Embodiment
In magnetron sputtering apparatus, thickness be high-purity Copper Foil of 0.01mm as the sputter base material, graphite target is a sputtering target, charges into argon gas, the vacuum degree 1.0*10 of operating room
-2Pa, sputtering power 2.5Kw, the distance between sputtering target and the copper foil base material is 45mm, the walking speed 15m/min of copper foil base material, at copper foil surface deposition one deck carbon-coating, deposit thickness is 0.003mm; The copper foil material that covers behind the carbon is heat-treated in the heat-treatment furnace of the mixed atmosphere that comprises hydrogen and nitrogen, heat treatment temperature is 400 ℃, is incubated 6 hours again.
Adopt method for preparing the surface be covered with the Copper Foil of carbon-coating, carbon-coating thickness is 0.003mm.That uses present embodiment respectively covers carbon Copper Foil and the common Copper Foil negative current collector as lithium ion battery, and all the other technologies are identical, are made into lithium ion battery.Under the same terms, test the circulation volume rate of descent of two kinds of batteries respectively, the results are shown in accompanying drawing 1.
Can see by Fig. 1, adopt the lithium ion battery that the carbon Copper Foil is made the negative current collector material that covers of present embodiment, its circulation volume rate of descent is starkly lower than with the rate of descent of common Copper Foil as the lithium ion battery of negative current collector, reflected this kind battery to recycle life performance higher.
Embodiment 2
In magnetron sputtering apparatus, thickness be the high-purity aluminum foil of 0.015mm as the sputter base material, graphite target is a sputtering target, charges into argon gas, the vacuum degree 3.0*10 of operating room
-2Pa, sputtering power 4.5Kw, the distance between sputtering target and the aluminium foil base material is 40mm, the walking speed 20m/min of aluminium foil base material, aluminium foil surface deposition one deck carbon-coating, deposit thickness is 0.005mm; The aluminum foil material that covers behind the carbon is heat-treated in vacuum heat treatment furnace, heat treatment temperature is 500 ℃, is incubated 4 hours again.
Adopt method for preparing the surface be covered with the aluminium foil of carbon-coating, carbon-coating thickness is 0.005mm.That uses present embodiment respectively covers carbon aluminium foil and the normal aluminium foil plus plate current-collecting body as lithium ion battery, and all the other technologies are identical, are made into lithium ion battery.Under the same terms, test the internal resistance of two kinds of batteries respectively, the results are shown in accompanying drawing 2.
Can be seen that by Fig. 2 adopt the lithium ion battery that the carbon aluminium foil is made the plus plate current-collecting body material that covers of present embodiment, its internal resistance is starkly lower than with the internal resistance of normal aluminium foil as the lithium ion battery of plus plate current-collecting body, the electrical property of the former battery is better than latter's battery.
Embodiment 3
Adopt embodiment 1 to cover the carbon Copper Foil and make negative current collector, adopt the carbon aluminium foil that covers of embodiment 2 to make plus plate current-collecting body, all the other technologies are identical with existing lithium ion battery manufacture craft, prepare follow-on lithium ion battery, under the same conditions, test the capacity of this modified model lithium ion battery and plain edition lithium ion battery respectively, test result is seen accompanying drawing 3.
As shown in Figure 3, the gram volume of follow-on lithium ion battery is apparently higher than the gram volume of plain edition lithium ion battery.
In magnetron sputtering apparatus, thickness be the high-purity aluminum foil of 0.015mm as the sputter base material, graphite target is a sputtering target, charges into argon gas, the vacuum degree 2.0*10 of operating room
-2Pa, sputtering power 3.5Kw, the distance between sputtering target and the aluminium foil base material is 80mm, the walking speed 10m/min of aluminium foil base material, aluminium foil surface deposition one deck carbon-coating, deposit thickness is 0.01mm; The aluminum foil material that covers behind the carbon is heat-treated in vacuum heat treatment furnace, heat treatment temperature is 600 ℃, is incubated 4 hours again.It is 0.01mm that the aluminium foil surface for preparing covers carbon-coating thickness.
In magnetron sputtering apparatus, thickness be high-purity Copper Foil of 0.01mm as the sputter base material, graphite target is a sputtering target, charges into argon gas, the vacuum degree 1.5*10 of operating room
-2Pa, sputtering power 5Kw, the distance between sputtering target and the copper foil base material is 55mm, the walking speed 30/min of copper foil base material, at copper foil surface deposition one deck carbon-coating, deposit thickness is 0.015mm; The copper foil material that covers behind the carbon is heat-treated in the heat-treatment furnace of the mixed atmosphere that comprises hydrogen and nitrogen, heat treatment temperature is 300 ℃, is incubated 10 hours again.It is 0.015mm that the copper foil surface for preparing covers carbon-coating thickness.
Claims (7)
1. the electrode current collecting body material of a lithium ion battery is characterized in that: at metal copper foil or/and aluminium foil surface is covered with carbon-coating.
2. the electrode current collecting body material of lithium ion battery as claimed in claim 1, it is characterized in that: described surface carbon layer thickness is 0.003～0.015mm.
3. prepare the method for the electrode current collecting body material of lithium ion battery as claimed in claim 1, it is characterized in that: adopt physical gas-phase deposite method at metal copper foil or/and aluminium foil surface deposition carbon-coating.
4. the method for the electrode current collecting body material of lithium ion battery as claimed in claim 3, it is characterized in that: described physical gas-phase deposite method preferably adopts magnetron sputtering technique.
5. the method for the electrode current collecting body material of lithium ion battery as claimed in claim 4, it is characterized in that: described magnetron sputtering technique condition is: be sputtering target with the graphite target, metal copper foil or aluminium foil are the sputter base material, charge into argon gas, operating room's vacuum degree (1.0～3.0) * 10
-2Pa, sputtering power 2～5Kw, the distance between sputtering target and the base material is 40～80mm, the walking speed 10～30m/min of base material.
6. as the method for the electrode current collecting body material of one of claim 3-5 described lithium ion battery, it is characterized in that: behind described deposit carbon layer process, heat-treat again, a kind of in the following manner selected in heat treatment for use: the one, the atmosphere of reducible metal is arranged in the heat-treatment furnace, and the 2nd, adopt vacuum heat-treating method.
7. the method for the electrode current collecting body material of lithium ion battery as claimed in claim 6, it is characterized in that: heat treatment temperature is 300～600 ℃, is incubated 4～10 hours.
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Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103187593A (en) * | 2011-12-30 | 2013-07-03 | 万向电动汽车有限公司 | Preparation method of flexible-package high-power lithium ion power battery |
| CN103427087A (en) * | 2012-05-17 | 2013-12-04 | 清华大学 | Current collector, electrochemical cell electrode, and electrochemical cell |
| CN103515616A (en) * | 2012-06-27 | 2014-01-15 | 万向电动汽车有限公司 | Positive electrode piece of lithium-ion power battery and preparation method thereof |
| CN103545533A (en) * | 2013-10-18 | 2014-01-29 | 中国第一汽车股份有限公司 | Lithium battery with high specific energy and preparation method for current collector of lithium battery |
| CN105406085A (en) * | 2015-11-30 | 2016-03-16 | 山东精工电子科技有限公司 | Lithium battery copper foil pole piece and preparation method thereof |
| CN106252666A (en) * | 2016-10-11 | 2016-12-21 | 合肥国轩高科动力能源有限公司 | Preparation method of lithium ion battery negative current collector |
| CN106654283A (en) * | 2015-11-01 | 2017-05-10 | 深圳市沃特玛电池有限公司 | Aluminium foil current collector and manufacture method and lithium battery having aluminium foil current collector thereof |
| CN107256970A (en) * | 2017-06-12 | 2017-10-17 | 湖南格兰博智能科技有限责任公司 | A kind of processing method of lithium ion battery base band |
| CN107502870A (en) * | 2016-08-12 | 2017-12-22 | 深圳市烯谷能源控股有限公司 | A kind of method for improving lithium battery anode aluminium foil colelctor electrode electrical property |
| CN107768677A (en) * | 2017-09-18 | 2018-03-06 | 深圳市烯谷能源控股有限公司 | A kind of method for improving lithium ion cell positive colelctor electrode corrosion resisting property |
| CN104701481B (en) * | 2014-12-23 | 2018-07-24 | 神工光电科技有限公司 | Lithium ion cell polar ear and preparation method thereof |
| CN108362849A (en) * | 2017-12-19 | 2018-08-03 | 成都亦道科技合伙企业（有限合伙） | A kind of high-throughput screening method of alloy collector |
| CN108735527A (en) * | 2018-07-10 | 2018-11-02 | 肇庆华锋电子铝箔股份有限公司 | A kind of metal foil collector for ultracapacitor |
| CN110649220A (en) * | 2019-09-03 | 2020-01-03 | 河南豫清新能源产业有限公司 | Surface carbon coating method for lithium battery aluminum foil |
| CN110752377A (en) * | 2019-12-04 | 2020-02-04 | 江西理工大学 | Battery current collector coated with graphite-like thin film, preparation method of battery current collector and prepared pole piece |
| WO2020177460A1 (en) * | 2019-03-04 | 2020-09-10 | 中天储能科技有限公司 | Three-dimensional carbon-coated porous aluminum and preparation method therefor |
| CN111916671A (en) * | 2020-07-20 | 2020-11-10 | 陕西煤业化工技术研究院有限责任公司 | Lithium ion battery cathode, lithium ion battery and preparation method of lithium ion battery cathode |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10106585A (en) * | 1996-09-30 | 1998-04-24 | Sanyo Electric Co Ltd | Non-aqueous electrolyte secondary battery |
| CN1213149A (en) * | 1997-06-20 | 1999-04-07 | 松下电器产业株式会社 | Electrolytic condenser and manufacture method thereof |
| JPH11250900A (en) * | 1998-02-26 | 1999-09-17 | Sony Corp | Manufacture and manufacturing device for electrode for nonaqueous electrolyte secondary battery, electrode, and electrolyte secondary battery using its electrode |
| CN1467023A (en) * | 2002-07-09 | 2004-01-14 | 中国科学院广州能源研究所 | Photocatalyst film having light activity visible basal body and method for preparing the same |
| WO2009141691A2 (en) * | 2008-05-22 | 2009-11-26 | Toyota Jidosha Kabushiki Kaisha | Secondary-battery current collector foil and method of manufacturing the same |
-
2010
- 2010-03-04 CN CN2010101174233A patent/CN101958418A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10106585A (en) * | 1996-09-30 | 1998-04-24 | Sanyo Electric Co Ltd | Non-aqueous electrolyte secondary battery |
| CN1213149A (en) * | 1997-06-20 | 1999-04-07 | 松下电器产业株式会社 | Electrolytic condenser and manufacture method thereof |
| JPH11250900A (en) * | 1998-02-26 | 1999-09-17 | Sony Corp | Manufacture and manufacturing device for electrode for nonaqueous electrolyte secondary battery, electrode, and electrolyte secondary battery using its electrode |
| CN1467023A (en) * | 2002-07-09 | 2004-01-14 | 中国科学院广州能源研究所 | Photocatalyst film having light activity visible basal body and method for preparing the same |
| WO2009141691A2 (en) * | 2008-05-22 | 2009-11-26 | Toyota Jidosha Kabushiki Kaisha | Secondary-battery current collector foil and method of manufacturing the same |
Cited By (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103187593A (en) * | 2011-12-30 | 2013-07-03 | 万向电动汽车有限公司 | Preparation method of flexible-package high-power lithium ion power battery |
| CN103187593B (en) * | 2011-12-30 | 2016-07-06 | 万向电动汽车有限公司 | A kind of preparation method of flexible-package high-power lithium ion power battery |
| CN103427087A (en) * | 2012-05-17 | 2013-12-04 | 清华大学 | Current collector, electrochemical cell electrode, and electrochemical cell |
| CN103515616A (en) * | 2012-06-27 | 2014-01-15 | 万向电动汽车有限公司 | Positive electrode piece of lithium-ion power battery and preparation method thereof |
| CN103545533A (en) * | 2013-10-18 | 2014-01-29 | 中国第一汽车股份有限公司 | Lithium battery with high specific energy and preparation method for current collector of lithium battery |
| CN103545533B (en) * | 2013-10-18 | 2016-08-17 | 中国第一汽车股份有限公司 | The lithium battery of a kind of high-energy-density and the collector preparation method of lithium battery |
| CN104701481B (en) * | 2014-12-23 | 2018-07-24 | 神工光电科技有限公司 | Lithium ion cell polar ear and preparation method thereof |
| CN106654283A (en) * | 2015-11-01 | 2017-05-10 | 深圳市沃特玛电池有限公司 | Aluminium foil current collector and manufacture method and lithium battery having aluminium foil current collector thereof |
| CN105406085A (en) * | 2015-11-30 | 2016-03-16 | 山东精工电子科技有限公司 | Lithium battery copper foil pole piece and preparation method thereof |
| CN107502870A (en) * | 2016-08-12 | 2017-12-22 | 深圳市烯谷能源控股有限公司 | A kind of method for improving lithium battery anode aluminium foil colelctor electrode electrical property |
| CN107502870B (en) * | 2016-08-12 | 2019-09-03 | 惠州市烯谷新能源产业技术研究院有限公司 | A method of improving lithium battery anode aluminium foil collector electrical property |
| CN106252666A (en) * | 2016-10-11 | 2016-12-21 | 合肥国轩高科动力能源有限公司 | Preparation method of lithium ion battery negative current collector |
| CN107256970A (en) * | 2017-06-12 | 2017-10-17 | 湖南格兰博智能科技有限责任公司 | A kind of processing method of lithium ion battery base band |
| CN107768677A (en) * | 2017-09-18 | 2018-03-06 | 深圳市烯谷能源控股有限公司 | A kind of method for improving lithium ion cell positive colelctor electrode corrosion resisting property |
| CN108362849A (en) * | 2017-12-19 | 2018-08-03 | 成都亦道科技合伙企业（有限合伙） | A kind of high-throughput screening method of alloy collector |
| CN108735527A (en) * | 2018-07-10 | 2018-11-02 | 肇庆华锋电子铝箔股份有限公司 | A kind of metal foil collector for ultracapacitor |
| WO2020177460A1 (en) * | 2019-03-04 | 2020-09-10 | 中天储能科技有限公司 | Three-dimensional carbon-coated porous aluminum and preparation method therefor |
| CN110649220A (en) * | 2019-09-03 | 2020-01-03 | 河南豫清新能源产业有限公司 | Surface carbon coating method for lithium battery aluminum foil |
| CN110752377A (en) * | 2019-12-04 | 2020-02-04 | 江西理工大学 | Battery current collector coated with graphite-like thin film, preparation method of battery current collector and prepared pole piece |
| CN111916671A (en) * | 2020-07-20 | 2020-11-10 | 陕西煤业化工技术研究院有限责任公司 | Lithium ion battery cathode, lithium ion battery and preparation method of lithium ion battery cathode |
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Application publication date: 20110126 |