CN102324496A - Tabletting method for lithium ion battery positive plate - Google Patents
Tabletting method for lithium ion battery positive plate Download PDFInfo
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- CN102324496A CN102324496A CN201110277786A CN201110277786A CN102324496A CN 102324496 A CN102324496 A CN 102324496A CN 201110277786 A CN201110277786 A CN 201110277786A CN 201110277786 A CN201110277786 A CN 201110277786A CN 102324496 A CN102324496 A CN 102324496A
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- positive plate
- ion battery
- battery positive
- lifepo
- based lithium
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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
Abstract
The invention discloses a tabletting method for a lithium ion battery positive plate. The tabletting method comprises the following steps of: firstly, preparing LiFePO4 material anode slurry; (2) coating a pole piece; (3) preliminarily tabletting; and (4) secondarily tabletting. According to the tabletting method disclosed by the invention, hot press processes for two times are adopted to effectively improve the compacted density of the positive plate. A binding agent is softened to improve the toughness of the positive plate. According to the lithium ion battery positive plate produced by using the method, the energy density of the battery can be effectively improved from 2.07g/cm<3> to 2.40g/cm<3>.
Description
Technical field
The present invention relates to the serondary lithium battery field, is a kind of method that improves the based lithium-ion battery positive plate compacted density, more particularly, is a kind of method that improves the based lithium-ion battery positive plate compacted density of using the higher LiFePO 4 material of spheroidization degree.
Background technology
At present lithium ion battery has been widely used in every field, and common in the daily life have portable phone battery, Notebook Battery, a portable power tool battery etc.The positive electrode that these lithium ion batteries are commonly used mainly concentrates on LiCoO
2, LiNiO
2, LiNi
(1-x-y)Mn
xCo
yMaterials such as O2, the common feature of these materials are that energy density is higher, but its shortcoming also is obvious, and the security feature of these materials is lower, and cost is higher, and cycle performance is relatively poor.To the pay attention to day by day of environmental protection, the used for electric vehicle lithium ion battery more and more widely makes to be used as the used for electric vehicle anode material for lithium-ion batteries LiMn is arranged the most widely at present along with at present
2O
4And LiFePO
4, LiMn
2O
4Cost advantage is preferably arranged, and simultaneously its normal-temperature circulating performance, security performance are more outstanding, but its maximum deficiency is to have Taylor effect, and when high temperature, especially more than 55 ℃ during high temperature, its cycle performance greatly reduces, and has had influence on the useful life of battery.Compare LiFePO with other materials
4Have low cost, high security, advantage such as high low temperature cycle characteristics preferably, but its inferior position is mainly reflected on its lower conductivity and the relatively poor energy density.Improve LiFePO at present
4The main method of conductivity have: 1, with material nanoization; 2, material surface is coated one deck carbon-coating; 3, material itself is carried out modification.Improved LiFePO greatly through these schemes
4Conductivity.
Known raising LiFePO
4The scheme of energy density mainly concentrate on a LiFePO with nanometerization
4Particle is handled, and forms the secondary ball of D50 at 5-20um, and in the hope of the compacted density through the raising electrode, the dressing amount that increases positive plate improves the energy density of battery.But the secondary ball that after secondary is made ball, forms is comparatively loose, and sphericity is higher relatively, uses a traditional tablet forming technique, the compacted density of raising positive plate that can't be real.
Summary of the invention
To offspring is spherical LiFePO
4The problem that the energy density of the positive plate that material is processed is comparatively loose the object of the present invention is to provide a kind of tabletting method of based lithium-ion battery positive plate, is that the technology through secondary hot pressing improves LiFePO
4The compacted density of the positive plate that material is processed, thus reach the compacted density that improves battery anode slice.
1), preparation LiFePO4 material positive electrode technical scheme of the present invention realizes in the following manner: a kind of tabletting method of based lithium-ion battery positive plate may further comprise the steps:; 2), pole piece coating; 3), compressing tablet; 4), the secondary compressing tablet, by weight percentage, may further comprise the steps, it is characterized in that:
1), preparation LiFePO
4The material anode sizing agent: selecting offspring for use is spherical LiFePO
4Material with conductive agent Super P, ks-6 and binding agent PVDF1100, is pressed LiFePO
4: the ratio of Super-P:ks-6:PVDF1100=90:3:2:5, with LiFePO
4, after Super P, three kinds of pressed powders of ks-6 mix fully, add the glue that PVDF and nmp solvent mix in planetary ball mill, mixing fully in planetary ball mill again is configured to (LiFePO
4, Super P, ks-6P, PVDF): the slurry of nmp solvent=45:55.
Described LiFePO
4Be iron phosphate powder, its particle size D50 is 5-20um, preferably 8-15um.
Described PVDF1100 is for gathering the inclined to one side ethene white powder of difluoro.
Described Super P is artificial conductive carbon.
Described ks-6 is the crystalline flake graphite conductive agent.
Described nmp solvent is a N-crassitude ketone solvent.
2), pole piece coating: the slurry of step 1) configuration evenly is coated in collector on the little coating machine of experiment two-sided, and the surface density of two-sided dressing is 0.02 ± 0.002g/cm
2, pole piece thickness is 210-230 um;
Described collector is the thick aluminium foil of 15-30 um, or the metal aluminum foil of precoating nanometer carbon-coating.
3), compressing tablet: under the hot-rolling press strip spare of 40 ℃ of-130 ℃ of temperature, pole piece is pressed onto 180 ± 3um, making compacted density is 1.85 ± 0.03g/cm
3
4), the secondary compressing tablet: after continue compacting down at the hot-rolling press strip spare of 40 ℃ of-130 ℃ of temperature again, the pole piece final thickness reaches 130 ± 3um, compacted density is 2.40 ± 0.03g/cm
3Based lithium-ion battery positive plate.
The present invention through the heat pressing process of secondary, can effectively improve the compacted density of positive plate.Through binding agent is softened, increase the pliability of pole piece.Than a heat pressing process, energy density is by 2.07g/cm
3Bring up to 2.40g/cm
3
Description of drawings
Fig. 1: be spheroidization LiFePO
4SEM figure.
Fig. 2: be the compacted density figure of the positive plate under the different pressures.
Fig. 3: be LiFePO in the positive plate under the different pressures
4View.
Embodiment
Embodiment 1:
Is the LiFePO of 10um with offspring for spherical, D50
4Material; With the ks-6 of conductive agent Super P, the production of Te Migao company and the binding agent PVDF1100 that Wu Yu chemical company produces; Solid matter contains percentage by weight in the slurry: the ratio of LiFePO4:Super-P:ks-6:PVDF1100=90:3:2:5; After getting LiFePO4, Super-P, three kinds of pressed powders of ks-6 and in planetary ball mill, mixing fully; Add and gather difluoro inclined to one side ethene white powder PVDF1100 and N-crassitude ketone solvent (nmp solvent), in planetary ball mill, mix fully again, be configured to (LiFePO
4, Super P, ks-6P, PVDF): the slurry of nmp solvent=45:55.
The slurry of configuration experiment be coated in uniformly on the little coating machine the thick aluminium foil of 15 um two-sided on, the surface density of two-sided dressing is 0.02g/cm
2, this moment, pole piece thickness was 210um, under 65 ℃ roll-in temperature, pole piece was pressed onto 180um then, the compacted density of this moment is at 1.85g/cm
3, and then under 65 ℃ roll-in temperature, continue compacting, and pole piece finally can reach 130um, and compacted density is 2.40g/cm
3
Being known by Fig. 1, is spheroidization LiFePO of the present invention
4SEM figure.Offspring is spherical LiFePO
4Its particle size of material D50 scope is at 5-20um, and be preferably: 8-15um further is preferably: 9-12um.D50 surpasses 20um, can cause coating thickness thicker, and the dressing surface density descends, and D50 is lower than 5um, can not be through twice or twice above compressing tablet raising compacted density.
The hot pressing temperature of the tablet press machine that uses is at 40 ℃-130 ℃.Temperature surpasses 130 ℃, and the positive pole material on the pole piece adheres on the presser wheel easily, and temperature is lower than 40 ℃, does not have the effect of softening binding agent.
Being known by Fig. 2, is the compacted density figure of the positive plate under the different pressures.Pressure is big more, and the compacted density of its positive plate is high more, and the offspring of the present invention's research is spherical LiFePO
4The positive plate that material is processed has critical catastrophe point in the compressing tablet process.Under low-pressure, the compacted density of pole piece is along with the increase of pressure changes greatly; Under high pressure, the compacted density of pole piece is along with the increase of pressure changes less relatively.Under low-pressure, spherical LiFePO
4Material carries out the accumulation of intergranular ordering, forms single arrangement; Under the high pressure, spherical loose LiFePO
4Material is owing to the increase of pressure, and (shown in Figure 3) piled up in the broken formation of ball calking.LiFePO with spherical morphology
4The critical catastrophe point of the compression of material occurs in compression ratio between 8%-20%, and it is between 12-15% that more interval range especially takes place.
Comparative example 1:
1, join slurry:With offspring is spherical LiFePO
4Material; D50 is 10um, with the ks-6 of conductive agent Super P, the production of Te Migao company and the binding agent PVDF1100 that Wu Yu chemical company produces, according to the ratio of mass ratio: LiFePO4:Super-P:ks-6:PVDF1100=90:3:2:5; Earlier LiFePO4, Super-P, three kinds of solid material of ks-6 are mixed in planetary ball mill fully; Again binding agent PVDF1100 is added, after mixing fully again, be configured to (LiFePO
4, Super P, ks-6P, PVDF): the slurry of nmp solvent=45:55.
2, be coated with pole piece: the pole piece of configuration is coated with into pole piece on the thick aluminium foil of 15um, the two-sided dressing of pole piece, the surface density of two-sided dressing is 0.02g/cm
2, pole piece thickness is at 195um (containing aluminium foil).
3, compressing tablet: under 65 ℃ roll-in temperature, use the mode of a compressing tablet, pole piece finally can reach 160um, and compacted density is at 2.05g/cm
3
Comparative example 2:
To there be treated LiFePO
4Material, playing main body is a ball, D50 is 1.2um; With conductive agent Super P, ks-6 (Te Migao) and binding agent PVDF1100 (Wu Yu chemistry); According to the ratio of mass ratio: LiFePO4:Super-P:ks-6:PVDF1100=90:3:2:5, in planetary ball mill, mix fully, on the thick aluminium foil of 15um, be coated with into pole piece; The two-sided dressing of pole piece, the surface density of two-sided dressing is 0.02g/cm
2, pole piece thickness is at 195um (containing collector), then under 65 ℃ roll-in temperature; Pole piece is pressed onto 180um, and the compacted density of this moment is at 1.85g/cc, and then continuation compacting under 65 ℃ roll-in temperature; Pole piece finally reaches 158um, and compacted density is at 2.07g/cm
3
Find out from above-mentioned comparative example 1-2, with a hot pressing or with there not being treated once spherical LiFePO
4Material all can not reach the object of the invention and effect through hot pressing.
Claims (8)
1), preparation LiFePO4 material anode sizing agent 1. the tabletting method of a based lithium-ion battery positive plate by weight percentage, may further comprise the steps:; 2), pole piece coating; 3), compressing tablet; 4), secondary compressing tablet; It is characterized in that:
1), preparation LiFePO
4The material anode sizing agent: selecting offspring for use is spherical LiFePO
4Material is with conductive agent Super P, ks-6 and binding agent PVDF1100, according to LiFePO
4: the ratio of Super-P:ks-6:PVDF1100=90:3:2:5, with LiFePO
4, after Super P, three kinds of pressed powders of ks-6 mix fully, add the glue that PVDF and nmp solvent mix in planetary ball mill, mixing fully in planetary ball mill again is configured to (LiFePO
4, Super P, ks-6P, PVDF): the slurry of nmp solvent=45:55;
2), pole piece coating: the slurry of step 1) configuration evenly is coated in collector on the little coating machine of experiment two-sided, and the surface density of two-sided dressing is 0.02 ± 0.002g/cm
2, pole piece thickness is 210-230 um;
3), compressing tablet: under the hot-rolling press strip spare of 40 ℃ of-130 ℃ of temperature, pole piece is pressed onto 180 ± 3um, making compacted density is 1.85 ± 0.03g/cm
3
4), the secondary compressing tablet: after continue compacting down at the hot-rolling press strip spare of 40 ℃ of-130 ℃ of temperature again, the pole piece final thickness reaches 130 ± 3um, compacted density is 2.40 ± 0.03g/cm
3Based lithium-ion battery positive plate.
2. the tabletting method of a kind of based lithium-ion battery positive plate according to claim 1 is characterized in that: the LiFePO of described step 1)
4Material is an iron phosphate powder, and its particle size D50 is 5-20um.
3. the tabletting method of a kind of based lithium-ion battery positive plate according to claim 1, it is characterized in that: the particle size D50 scope of described step 1) is: 8-15um.
4. the tabletting method of a kind of based lithium-ion battery positive plate according to claim 1, it is characterized in that: the PVDF1100 of described step 1) is for gathering the inclined to one side ethene white powder of difluoro.
5. the tabletting method of a kind of based lithium-ion battery positive plate according to claim 1, it is characterized in that: the Super-P of described step 1) is artificial conductive carbon.
6. the tabletting method of a kind of based lithium-ion battery positive plate according to claim 1, it is characterized in that: the ks-6 of described step 1) is the crystalline flake graphite conductive agent.
7. the tabletting method of a kind of based lithium-ion battery positive plate according to claim 1, it is characterized in that: the nmp solvent of described step 1) is a N-crassitude ketone solvent.
8. the tabletting method of a kind of based lithium-ion battery positive plate according to claim 1, it is characterized in that: the collector described step 2) is the metal aluminum foil of thick aluminium foil of 15-30 um or precoating nanometer carbon-coating.
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103632845A (en) * | 2012-08-24 | 2014-03-12 | 海洋王照明科技股份有限公司 | Graphene/organic thin film composite current collector, preparation method thereof, electrochemical electrode and electrochemical battery or capacitor |
| CN104016421A (en) * | 2014-06-24 | 2014-09-03 | 南通瑞翔新材料有限公司 | Preparation method for lithium ion positive electrode material |
| CN105655538A (en) * | 2014-11-25 | 2016-06-08 | 江苏永昌新能源科技有限公司 | Oily system preparation method of lithium battery positive electrode plate |
| CN106654154A (en) * | 2016-12-26 | 2017-05-10 | 浙江瓦力新能源科技有限公司 | Water-based ion battery plate manufacturing process |
| CN108336297A (en) * | 2017-12-29 | 2018-07-27 | 惠州市纬世新能源有限公司 | A kind of method for preparing lithium ion battery pole pieces |
| CN110323082A (en) * | 2019-07-30 | 2019-10-11 | 重庆中科超容科技有限公司 | A kind of preparation method of electrical double layer capacitor electrodes piece |
| CN113471413A (en) * | 2020-03-31 | 2021-10-01 | 北京卫蓝新能源科技有限公司 | Composite lithium supplement slurry, preparation method and application |
| CN114420885A (en) * | 2022-01-25 | 2022-04-29 | 上海兰钧新能源科技有限公司 | Pole piece manufacturing method |
| CN114464897A (en) * | 2022-02-11 | 2022-05-10 | 惠州亿纬锂能股份有限公司 | Method for improving high-temperature floating charge performance of lithium ion battery and lithium ion battery |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09293500A (en) * | 1996-04-26 | 1997-11-11 | Sanyo Electric Co Ltd | Manufacture of electrode plate for use in storage battery |
| CN1956243A (en) * | 2005-10-24 | 2007-05-02 | 比亚迪股份有限公司 | Battery pole piece and manufacturing method of lithium ion secordary battery containing the pole piece |
| CN101207195A (en) * | 2006-12-22 | 2008-06-25 | 比亚迪股份有限公司 | Method for preparation of battery pole piece |
| CN101436654A (en) * | 2007-11-13 | 2009-05-20 | 深圳市慧通天下科技股份有限公司 | Ferric phosphate lithium type safety high power lithium ion battery |
| CN101714658A (en) * | 2009-11-05 | 2010-05-26 | 湖南维邦新能源有限公司 | Preparation method of lithium iron phosphate for lithium ion battery |
-
2011
- 2011-09-19 CN CN201110277786A patent/CN102324496A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09293500A (en) * | 1996-04-26 | 1997-11-11 | Sanyo Electric Co Ltd | Manufacture of electrode plate for use in storage battery |
| CN1956243A (en) * | 2005-10-24 | 2007-05-02 | 比亚迪股份有限公司 | Battery pole piece and manufacturing method of lithium ion secordary battery containing the pole piece |
| CN101207195A (en) * | 2006-12-22 | 2008-06-25 | 比亚迪股份有限公司 | Method for preparation of battery pole piece |
| CN101436654A (en) * | 2007-11-13 | 2009-05-20 | 深圳市慧通天下科技股份有限公司 | Ferric phosphate lithium type safety high power lithium ion battery |
| CN101714658A (en) * | 2009-11-05 | 2010-05-26 | 湖南维邦新能源有限公司 | Preparation method of lithium iron phosphate for lithium ion battery |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103632845A (en) * | 2012-08-24 | 2014-03-12 | 海洋王照明科技股份有限公司 | Graphene/organic thin film composite current collector, preparation method thereof, electrochemical electrode and electrochemical battery or capacitor |
| CN104016421A (en) * | 2014-06-24 | 2014-09-03 | 南通瑞翔新材料有限公司 | Preparation method for lithium ion positive electrode material |
| CN104016421B (en) * | 2014-06-24 | 2016-05-04 | 南通瑞翔新材料有限公司 | A kind of preparation method of lithium ion anode material |
| CN105655538A (en) * | 2014-11-25 | 2016-06-08 | 江苏永昌新能源科技有限公司 | Oily system preparation method of lithium battery positive electrode plate |
| CN106654154A (en) * | 2016-12-26 | 2017-05-10 | 浙江瓦力新能源科技有限公司 | Water-based ion battery plate manufacturing process |
| CN108336297A (en) * | 2017-12-29 | 2018-07-27 | 惠州市纬世新能源有限公司 | A kind of method for preparing lithium ion battery pole pieces |
| CN108336297B (en) * | 2017-12-29 | 2021-10-08 | 惠州市纬世新能源有限公司 | Preparation method of lithium ion battery pole piece |
| CN110323082A (en) * | 2019-07-30 | 2019-10-11 | 重庆中科超容科技有限公司 | A kind of preparation method of electrical double layer capacitor electrodes piece |
| CN113471413A (en) * | 2020-03-31 | 2021-10-01 | 北京卫蓝新能源科技有限公司 | Composite lithium supplement slurry, preparation method and application |
| CN114420885A (en) * | 2022-01-25 | 2022-04-29 | 上海兰钧新能源科技有限公司 | Pole piece manufacturing method |
| CN114464897A (en) * | 2022-02-11 | 2022-05-10 | 惠州亿纬锂能股份有限公司 | Method for improving high-temperature floating charge performance of lithium ion battery and lithium ion battery |
| CN114464897B (en) * | 2022-02-11 | 2023-06-30 | 惠州亿纬锂能股份有限公司 | Method for improving high-temperature floating charge performance of lithium ion battery and lithium ion battery |
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Application publication date: 20120118 |