CN102694179A - Lithium ion battery and manufacturing method thereof - Google Patents
Lithium ion battery and manufacturing method thereof Download PDFInfo
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- CN102694179A CN102694179A CN2012101923344A CN201210192334A CN102694179A CN 102694179 A CN102694179 A CN 102694179A CN 2012101923344 A CN2012101923344 A CN 2012101923344A CN 201210192334 A CN201210192334 A CN 201210192334A CN 102694179 A CN102694179 A CN 102694179A
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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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- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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Abstract
The invention discloses a lithium ion battery, which comprises an anode piece, a cathode piece and a diaphragm. The anode piece comprises a foamed aluminum current collector. The cathode piece comprises a foamed copper current collector. The foamed aluminum current collector is coated with a carbon layer. The foamed copper current collector is coated with a nickel layer. The invention additionally discloses a manufacturing method of the lithium ion battery. The manufacturing method comprises steps of manufacturing the anode piece and the cathode piece, wherein the step of manufacturing the anode piece comprises the steps of providing the foamed aluminum current collector and coating the carbon layer on the foamed aluminum current collector; and the step of manufacturing the cathode piece comprises the steps of providing the foamed copper current collector and coating the nickel layer on the foamed copper current collector. The lithium ion battery and the manufacturing method thereof have the advantages that the surfaces of the foamed current collectors can be prevented from being oxidized, the stability, the conductivity and the consistency of the current collectors are improved and the performance of contact between active substances and the current collectors can be improved.
Description
Technical field
The present invention relates to the lithium ion battery field, particularly relate to a kind of lithium ion battery and preparation method thereof.
Background technology
Along with the progress of science and technology, the digital type mobile product in the conventional use field of lithium ion battery, and new application energy storage and electric automobile etc., all the energy density to lithium ion battery has proposed increasingly high requirement.In recent years there is the part lithium ion battery to adopt the foaming collector,, reduces the method for pole piece length, increase the energy density of lithium ion battery to improve on the unit are and the activity substance content on the Unit Weight like foaming aluminium, foam copper.But still there is certain drawback in this method.In air, store, oxidation takes place and generates aluminium oxide in foaming aluminium easily, and foam copper then is prone to generate cupric oxide and basic copper carbonate, has reduced the conductivity of active material and collector, makes the internal resistance of battery, and polarization raises, and causes battery discharge incomplete, and capacity reduces.And, because the degree varies appearance of collector different parts reaction also can exert an influence to battery consistency.
Summary of the invention
The object of the invention is exactly the deficiency to prior art, and a kind of lithium ion battery is provided, the collection liquid surface oxidation that prevents to foam, and stability, conductivity and the consistency of raising collector promote battery performance.
For realizing above-mentioned purpose, the present invention adopts following technical scheme:
A kind of lithium ion battery comprises anode pole piece, cathode pole piece and barrier film, and said anode pole piece comprises foaming aluminium collector; Said cathode pole piece comprises the foam copper collector; It is characterized in that, be coated with carbon-coating on the said foaming aluminium collector, be coated with nickel dam on the said foam copper collector.
Preferably, said carbon-coating thickness is 0.0005 mm-0.002mm.
Preferably, said nickel layer thickness is 0.0005 mm-0.002mm.
Preferably, the thickness of said foaming aluminium and/or foam copper collector is 0.1 mm-2.0mm, and the aperture is 0.01 mm-0.50mm, and porosity is 80%-99%.
A kind of manufacture method of lithium ion battery; Comprise the step of making anode pole piece and cathode pole piece; It is characterized in that; The step of said making anode pole piece comprises to be provided foaming aluminium collector and on said foaming aluminium collector, coats carbon-coating, and the step of said making cathode pole piece comprises to be provided the foam copper collector and on said foam copper collector, coat nickel dam.
Preferably, said carbon-coating thickness is 0.0005 mm-0.002mm, and/or said nickel layer thickness is 0.0005 mm-0.002mm.
Preferably, the thickness of said foaming aluminium and/or foam copper collector is 0.1 mm-2.0mm, and the aperture is 0.01 mm-0.50mm, and porosity is 80%-99%.
After the positive and negative electrode material is mixed with slurry, go up on corresponding collector oven dry then respectively through the slurry method.
First precompressed is foamed collector to predetermined thickness before the spreading mass, or the direct material loading of not precompressed foaming collector.
With on the positive and negative electrode material on the foaming collector after, according to the performance of material pole piece is carried out roll-in, process anode pole piece and cathode pole piece through cutting again.
Beneficial technical effects of the present invention is:
Lithium ion cell positive foaming aluminium collection liquid surface of the present invention is handled through carbon coated; Negative pole foam copper collection liquid surface is handled through coating nickel; Collector has after treatment improved aerial stability, and when the collector that can prevent to foam was placed in air, aluminium generated aluminium oxide; Copper generates materials such as cupric oxide and basic copper carbonate, has improved the conductivity between active material and the collector.Simultaneously, the adhesive force of active material on collector also has raising.For example, foaming aluminium has increased surface area after coat handling through carbon, reduced the tension force that contacts with active material, so the adhesive force of active material on foaming aluminium also has raising.Processing makes the degree of collector different parts reaction the same with coating nickel because carbon coated is handled, and has also improved battery consistency.Use to coat foaming al and ni after handling through carbon and coat the battery that the foam copper collector handled is made, than the battery impedance of routine foaming collector, multiplying power discharging, performances such as circulation all are improved.
Description of drawings
Fig. 1 is the lithium ion battery 1.0C multiplying power discharging curve of example 1, example 2 and comparative example;
Fig. 2 is the lithium ion battery charge and discharge cycles comparison diagram of example 1, example 2 and comparative example.
Embodiment
Below combine accompanying drawing that the present invention is further specified through embodiment.
The lithium ion battery of a kind of embodiment comprises anode pole piece, cathode pole piece and barrier film; Said anode pole piece comprises foaming aluminium collector; Said cathode pole piece comprises the foam copper collector, is coated with carbon-coating on the said foaming aluminium collector, is preferably 0.0005 mm-0.002mm; Be coated with nickel dam on the said foam copper collector, be preferably 0.0005 mm-0.002mm.
In some preferred embodiments, the thickness of said foaming aluminium, foam copper collector is 0.1 mm-2.0mm, and the aperture is 0.01 mm-0.50mm, and porosity is 80%-99%.This configuration of foaming collector helps cooperating carbon coating layer and nickel coating layer to improve the performance of battery substantially.
A kind of manufacture method of lithium ion battery; Comprise the step of making anode pole piece and cathode pole piece; The step of said making anode pole piece comprises to be provided foaming aluminium collector and on said foaming aluminium collector, coats carbon-coating, and the step of said making cathode pole piece comprises to be provided the foam copper collector and on said foam copper collector, coat nickel dam.Preferably, said carbon-coating thickness is 0.0005 mm-0.002mm, and said nickel layer thickness is 0.0005 mm-0.002mm.More preferably, the thickness of said foaming aluminium and/or foam copper collector is 0.1 mm-2.0mm, and the aperture is 0.01 mm-0.50mm, and porosity is 80%-99%.
Further, in anode pole piece manufacturing process, can earlier compositions such as positive electrode, conductive agent, binding agent, solvent be stirred; The foaming aluminium that will pass through carbon coating processing is pre-stressed to certain thickness; Also can not precompressed, then through the method for slurry, go up on the foaming collector; Carry out to a certain degree roll-in according to material property again and operation such as cut, process positive plate.In cathode pole piece manufacturing process; Can earlier compositions such as negative material, conductive agent, binding agent, solvent be stirred, will pass through the foam copper that nickel coat to handle and be pre-stressed to certain thickness, also can not precompressed; Method through slurry then; Go up on the foaming collector, carry out operations such as to a certain degree roll-in cuts according to material property again, process negative plate.
Anode pole piece that makes and cathode pole piece can be assembled into battery with barrier film through modes such as coiling, laminations, add shell, inject electrolyte, can be made into battery through changing into operations such as detection.
Below come further to illustrate feature and advantage of the present invention through concrete example and comparative example.
Example 1
Anodal cobalt acid lithium: PVDF:SP:NMP is stirred in the ratio of 100:1.2:1.5:35, is that 0.375mm foaming aluminium is pre-stressed to 0.300mm with surface density for 54.2g/m2 thickness, and the aperture of foaming aluminium is 0.15-0.26mm; Porosity is 94.6%, and hole count is 74.2/mm3, carbon coated layer thickness 0.0015mm; Then through on the slurry method on the foaming aluminium after the precompressed; Obtain thickness 0.263mm through operations such as roll-in cut after the oven dry, width 59mm, the positive plate of length 250mm.Negative pole graphite: SFG-6:CMC:SBR:H2O is stirred in the ratio of 100:1.0:1.2:2.5:95; Surface density is pre-stressed to 0.338mm for 111.0g/m2 thickness for the 0.423mm foam copper, and the aperture of foam copper is 0.19-0.30mm, and porosity is 97.3%; Hole count is 53.0/mm3; Coat nickel layer thickness 0.001mmm, then through on the slurry method on the foam copper after the precompressed, obtain thickness 0.270mm through operations such as roll-in cut after the oven dry; Width 60mm, the negative plate of length 290mm.Be that the 700mm barrier film is assembled into battery through winding method with positive plate and negative plate with length then, add shell, inject electrolyte, can be made into battery through changing into operations such as detection.Process lithium ion battery 474168P according to the method described above.
Example 2
Anodal cobalt acid lithium: PVDF:SP:NMP is stirred in the ratio of 100:1.2:1.5:35, and getting surface density is 0.320mm foaming aluminium for 38.9g/m2 thickness, and the aperture of foaming aluminium is 0.02-0.10mm; Porosity is 95.5%; Hole count is 9008.5/mm3, carbon coated layer thickness 0.0008mm then through on the slurry method on foaming aluminium, obtain thickness 0.224mm through operations such as roll-in cut after the oven dry; Width 59mm, the positive plate of length 286mm.Negative pole graphite: SFG-6:CMC:SBR:H2O is stirred in the ratio of 100:1.0:1.2:2.5:95, surface density is pre-stressed to 0.326mm for 79.7g/m2 thickness for the 0.363mm foam copper, the aperture of foam copper is 0.03-0.12mm; Coat nickel layer thickness 0.0006mm, porosity is 97.8%, and hole count is 4492.6/mm3; Then through on the slurry method on foam copper; Obtain thickness 0.231mm through operations such as roll-in cut after the oven dry, width 60mm, the negative plate of length 326mm.Be that the 775mm barrier film is assembled into battery through winding method with positive plate and negative plate with length then, add shell, inject electrolyte, can be made into battery through changing into operations such as detection.Process lithium ion battery 474168P according to the method described above.
Comparative example
Anodal cobalt acid lithium: PVDF:SP:NMP is stirred in the ratio of 100:1.2:1.5:35, is that 0.375mm foaming aluminium is pre-stressed to 0.300mm with surface density for 54.2g/m2 thickness, and the aperture of foaming aluminium is 0.15-0.26mm; Porosity is 94.6%, and hole count is 74.2/mm3, and foaming aluminium does not coat through carbon and handles; Then through on the slurry method on the foaming aluminium after the precompressed; Obtain thickness 0.263mm through operations such as roll-in cut after the oven dry, width 59mm, the positive plate of length 250mm.Negative pole graphite: SFG-6:CMC:SBR:H2O is stirred in the ratio of 100:1.0:1.2:2.5:95; Surface density is pre-stressed to 0.338mm for 111.0g/m2 thickness for the 0.423mm foam copper, and the aperture of foam copper is 0.19-0.30mm, and porosity is 97.3%; Hole count is 53.0/mm3; Foam copper coat to be handled through nickel, then through on the slurry method on the foam copper after the precompressed, obtain thickness 0.270mm through operations such as roll-in cut after the oven dry; Width 60mm, the negative plate of length 290mm.Be that the 700mm barrier film is assembled into battery through winding method with positive plate and negative plate with length then, add shell, inject electrolyte, can be made into battery through changing into operations such as detection.Process lithium ion battery 474168P according to the method described above.
Table 1 each routine capacity of lithium ion battery and internal resistance
| ? | 0.5C capacity mAh | 1.0C capacity mAh | Internal resistance m Ω |
| Example 1 | 1590 | 1580 | 35 |
| Example 2 | 1595 | 1588 | 33 |
| Comparative Examples | 1582 | 1565 | 40 |
From 1.0C multiplying power discharging curve chart shown in Figure 1 (curve of example 1, example 2 overlaps basically Fig. 1) and battery charging and discharging circulation comparison diagram shown in Figure 2; Can see; The lithium ion battery that obtains according to example of the present invention 1, example 2; With the lithium ion battery of the comparative example of making according to traditional scheme, performance has significant lifting.
Above content is to combine concrete preferred implementation to the further explain that the present invention did, and can not assert that practical implementation of the present invention is confined to these explanations.For the those of ordinary skill of technical field under the present invention, under the prerequisite that does not break away from the present invention's design, can also make some simple deduction or replace, all should be regarded as belonging to protection scope of the present invention.
Claims (10)
1. a lithium ion battery comprises anode pole piece, cathode pole piece and barrier film, and said anode pole piece comprises foaming aluminium collector; Said cathode pole piece comprises the foam copper collector; It is characterized in that, be coated with carbon-coating on the said foaming aluminium collector, be coated with nickel dam on the said foam copper collector.
2. lithium ion battery as claimed in claim 1 is characterized in that, said carbon-coating thickness is 0.0005 mm-0.002mm.
3. lithium ion battery as claimed in claim 1 is characterized in that, said nickel layer thickness is 0.0005 mm-0.002mm.
4. like each described lithium ion battery of claim 1-3, it is characterized in that the thickness of said foaming aluminium and/or foam copper collector is 0.1 mm-2.0mm, the aperture is 0.01 mm-0.50mm, and porosity is 80%-99%.
5. the manufacture method of a lithium ion battery; Comprise the step of making anode pole piece and cathode pole piece; It is characterized in that; The step of said making anode pole piece comprises to be provided foaming aluminium collector and on said foaming aluminium collector, coats carbon-coating, and the step of said making cathode pole piece comprises to be provided the foam copper collector and on said foam copper collector, coat nickel dam.
6. like the manufacture method of the said lithium ion battery of claim 5, it is characterized in that said carbon-coating thickness is 0.0005 mm-0.002mm, and/or said nickel layer thickness is 0.0005 mm-0.002mm.
7. like the manufacture method of the said lithium ion battery of claim 5, it is characterized in that the thickness of said foaming aluminium and/or foam copper collector is 0.1 mm-2.0mm, the aperture is 0.01 mm-0.50mm, and porosity is 80%-99%.
8. like the manufacture method of each said lithium ion battery of claim 5 to 7, it is characterized in that, further comprising the steps of: as after the positive and negative electrode material is mixed with slurry, to go up on corresponding collector oven dry then respectively through the slurry method.
9. like the manufacture method of the said lithium ion battery of claim 8, it is characterized in that first precompressed is foamed collector to predetermined thickness before the spreading mass, or the direct material loading of not precompressed foaming collector.
10. like the manufacture method of each said lithium ion battery of claim 5 to 7, it is characterized in that, with on the positive and negative electrode material on the foaming collector after, according to the performance of material pole piece is carried out roll-in, process anode pole piece and cathode pole piece through cutting again.
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| CN2012101923344A CN102694179A (en) | 2012-06-12 | 2012-06-12 | Lithium ion battery and manufacturing method thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109786757A (en) * | 2019-03-04 | 2019-05-21 | 中天储能科技有限公司 | Cover carbon foam aluminium compound and preparation method thereof, collector and filtering material |
| CN109873167A (en) * | 2019-03-04 | 2019-06-11 | 中天储能科技有限公司 | Three-dimensional covers carbon porous aluminum and preparation method thereof |
| CN109904459A (en) * | 2019-03-04 | 2019-06-18 | 中天储能科技有限公司 | Cover carbon foam aluminium composite material and preparation method thereof, collector and filtering material |
| CN110611102A (en) * | 2019-10-21 | 2019-12-24 | 瑞浦能源有限公司 | Current collector, pole piece, preparation method of pole piece and electrochemical energy storage device |
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| CN101341624A (en) * | 2005-12-22 | 2009-01-07 | 富士重工业株式会社 | Lithium metal foil for battery or capacitor |
| CN102222801A (en) * | 2010-04-13 | 2011-10-19 | 夏普株式会社 | Secondary battery |
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| CN101341624A (en) * | 2005-12-22 | 2009-01-07 | 富士重工业株式会社 | Lithium metal foil for battery or capacitor |
| CN101212070A (en) * | 2006-12-30 | 2008-07-02 | 比亚迪股份有限公司 | Laminated Li-ion secondary battery and method for producing the battery |
| CN102222801A (en) * | 2010-04-13 | 2011-10-19 | 夏普株式会社 | Secondary battery |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109786757A (en) * | 2019-03-04 | 2019-05-21 | 中天储能科技有限公司 | Cover carbon foam aluminium compound and preparation method thereof, collector and filtering material |
| CN109873167A (en) * | 2019-03-04 | 2019-06-11 | 中天储能科技有限公司 | Three-dimensional covers carbon porous aluminum and preparation method thereof |
| CN109904459A (en) * | 2019-03-04 | 2019-06-18 | 中天储能科技有限公司 | Cover carbon foam aluminium composite material and preparation method thereof, collector and filtering material |
| 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 |
| WO2020177461A1 (en) * | 2019-03-04 | 2020-09-10 | 中天储能科技有限公司 | Carbon-coated foamed aluminum composite material and preparation method therefor, current collector and filter material |
| CN110611102A (en) * | 2019-10-21 | 2019-12-24 | 瑞浦能源有限公司 | Current collector, pole piece, preparation method of pole piece and electrochemical energy storage device |
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Application publication date: 20120926 |