CN101609881A - Lithium ion battery anode slurry and preparation method thereof - Google Patents
Lithium ion battery anode slurry and preparation method thereof Download PDFInfo
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- CN101609881A CN101609881A CNA2009101814754A CN200910181475A CN101609881A CN 101609881 A CN101609881 A CN 101609881A CN A2009101814754 A CNA2009101814754 A CN A2009101814754A CN 200910181475 A CN200910181475 A CN 200910181475A CN 101609881 A CN101609881 A CN 101609881A
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- slurry
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- lithium ion
- ion battery
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- 238000002360 preparation method Methods 0.000 title claims abstract description 14
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 12
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 12
- 239000006256 anode slurry Substances 0.000 title abstract description 4
- 239000002002 slurry Substances 0.000 claims abstract description 32
- 239000002270 dispersing agent Substances 0.000 claims abstract description 14
- 239000002904 solvent Substances 0.000 claims abstract description 9
- 239000011230 binding agent Substances 0.000 claims abstract description 8
- 239000006258 conductive agent Substances 0.000 claims abstract description 8
- 239000003292 glue Substances 0.000 claims description 13
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 claims description 5
- 239000002033 PVDF binder Substances 0.000 claims description 5
- 229920002981 polyvinylidene fluoride Polymers 0.000 claims description 5
- 239000006229 carbon black Substances 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 229910002097 Lithium manganese(III,IV) oxide Inorganic materials 0.000 claims 2
- 230000008021 deposition Effects 0.000 abstract description 7
- 238000000576 coating method Methods 0.000 abstract description 4
- QHGJSLXSVXVKHZ-UHFFFAOYSA-N dilithium;dioxido(dioxo)manganese Chemical compound [Li+].[Li+].[O-][Mn]([O-])(=O)=O QHGJSLXSVXVKHZ-UHFFFAOYSA-N 0.000 abstract description 4
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 abstract description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract description 2
- 229910052782 aluminium Inorganic materials 0.000 abstract description 2
- 229910052744 lithium Inorganic materials 0.000 abstract description 2
- 239000011888 foil Substances 0.000 abstract 1
- 230000000052 comparative effect Effects 0.000 description 9
- 238000012360 testing method Methods 0.000 description 8
- 239000000203 mixture Substances 0.000 description 4
- KMTRUDSVKNLOMY-UHFFFAOYSA-N Ethylene carbonate Chemical compound O=C1OCCO1 KMTRUDSVKNLOMY-UHFFFAOYSA-N 0.000 description 3
- 239000006257 cathode slurry Substances 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- 239000003792 electrolyte Substances 0.000 description 3
- 239000007774 positive electrode material Substances 0.000 description 3
- 238000004513 sizing Methods 0.000 description 3
- 239000005030 aluminium foil Substances 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- IEJIGPNLZYLLBP-UHFFFAOYSA-N dimethyl carbonate Chemical compound COC(=O)OC IEJIGPNLZYLLBP-UHFFFAOYSA-N 0.000 description 2
- 238000009472 formulation Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000014759 maintenance of location Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 239000006228 supernatant Substances 0.000 description 2
- 239000004094 surface-active agent Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910013872 LiPF Inorganic materials 0.000 description 1
- 229910013870 LiPF 6 Inorganic materials 0.000 description 1
- 101150058243 Lipf gene Proteins 0.000 description 1
- -1 adding LiMn2O4 Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- MTAZNLWOLGHBHU-UHFFFAOYSA-N butadiene-styrene rubber Chemical compound C=CC=C.C=CC1=CC=CC=C1 MTAZNLWOLGHBHU-UHFFFAOYSA-N 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 230000022131 cell cycle Effects 0.000 description 1
- 239000011889 copper foil Substances 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000007591 painting process Methods 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000007581 slurry coating method Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 239000003643 water by type Substances 0.000 description 1
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Classifications
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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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- Battery Electrode And Active Subsutance (AREA)
Abstract
The invention belongs to the field of lithium batteries, and discloses a lithium ion battery anode slurry and a preparation method thereof. The formula of the slurry adopts the following components in parts by weight: lithium manganate: 63-89 parts of a conductive agent: 1.8-3.6 parts of binder: 2.5-4.8 parts of dispersant: 2-15 parts of solvent: 58-80 parts. The dispersing agent is added into the slurry, so that the viscosity of the slurry is reduced, the stability of the slurry is improved, and the phenomenon of slurry deposition is avoided in the pole piece coating process, so that the consistency of the slurry and the consistency of the distribution of the slurry on a current collector aluminum foil are improved, and the consistency and the cycle performance of a battery can be improved.
Description
Technical field
The invention belongs to the lithium battery field, relate to a kind of lithium ion battery anode glue size and preparation method thereof.
Background technology
Lithium ion battery generally includes only positive active material (LiMn2O4), conductive agent, binding agent, solvent with lithium manganate cathode slurry composition at present, and does not add dispersant.The defective of this preparation prescription mainly is that the viscosity of slurry is higher, stability is not high enough, and in painting process, depositional phenomenon can take place slurry, thereby causes the consistency of slurry relatively poor, and the pole piece thickness distribution inequality that is coated with out influences the performance of battery.
Summary of the invention
Purpose of the present invention is exactly the shortcoming that overcomes above-mentioned technical formula, and a kind of lithium ion battery lithium manganate cathode slurry and preparation method thereof is provided.This slurry has stability and consistency preferably, and under other performances of battery were not obviously influenced, cycle performance was significantly improved.
The present invention realizes by following technical proposal:
A kind of lithium ion battery anode glue size, the prescription of this slurry adopts following components in part by weight:
LiMn2O4: 63-89 part,
Conductive agent: 1.8-3.6 part,
Binding agent: 2.5-4.8 part,
Dispersant: 2-15 part,
Solvent: 58-80 part.
Described lithium ion battery anode glue size, wherein conductive agent is a carbon black, binding agent is polyvinylidene fluoride (PVDF), dispersant is hypermer kd-1 (a kind of non-ionic surface active agent of high polymer, Britain standing grain major company conducting powder dispersant special, model is kd-1), solvent is N-methyl pyrrolidone (NMP).
The preparation method of described lithium ion battery anode glue size comprises the following steps:
Binding agent is added solvent, mix and stir 6-8 hour glue, adding LiMn2O4, conductive agent, dispersant stirred 8-12 hour after glue was finished, and made final slurry.
Beneficial effect of the present invention:
The present invention adopts a kind of non-ionic surface active agent of high polymer as dispersant, can reduce the viscosity of slurry, improve stability of slurry, guarantee in the pole piece coating process, not take place the slurry depositional phenomenon, thereby improve the consistency of slurry, and on the collector aluminium foil Uniformity of Distribution, and can improve the consistency and the cycle performance of battery.
Description of drawings
Fig. 1 is that different formulations slurry deposition is with shelving time relation figure;
Fig. 2 is the battery capacity conservation rate of different formulations anode sizing agent making and the graph of a relation of cycle-index.
Embodiment
The invention will be further elaborated by the following examples.
Embodiment 1:
Present embodiment illustrates the preparation method of lithium manganate cathode slurry provided by the invention.
1, the oven dry of positive active material
The positive active material LiMn2O4 with 110 ℃ of bakings 12 hours, is that with dew point temperature-50 ℃ dry gas is cooled to room temperature in the vacuum environment of 0.05 MPa.
2, Zheng Ji preparation
With 50g/ part is example, with 225g polyvinylidene fluoride (PVDF, F2) be dissolved in 6-8 hour glue of mixing in 3250g N-methyl pyrrolidone (NMP) solvent, LiMn2O4 4350g after will drying then, carbon black 175g, dispersant hypermer kd-1 (Britain standing grain major company) 250g join in the above-mentioned solution, fully stir and obtain anode sizing agent in 8-12 hour.With coating machine with this slurry coating to the aluminium foil of 20 μ m, through 120 ℃ of vacuum and heating drying 2h, roll-in, cut-parts make 500mm (length) * 118mm (wide) * 192 μ m (thick) pole piece, compacted density is 2.5g/cm
3
3, negative pole preparation
2300g graphite, 50g carbon fiber and 70g butadiene-styrene rubber (SBR) are mixed, adding 2800 ml waters mixes, be coated to coating machine on the Copper Foil of 12 μ m, through 135 ℃ of vacuum and heating drying 3h, 550mm (length) * 122mm (wide) * 130 μ m (thick) pole piece is made in roll-in, and compacted density is 1.3g/cm
3
4, electrolyte preparation
With LiPF
6Be configured to LiPF with ethylene carbonate (EC) and dimethyl carbonate (DMC)
6Concentration is that the solution (volume ratio of EC/DMC is 1: 1) of 1mol/L is as electrolyte.
The negative pole that the positive pole that above-mentioned (2) are obtained and (3) obtain utilizes the square electric core of membrane coil coiled of 40 μ m, adopts the heat-sealing of aluminum plastic film packing, injects the electrolyte 20g that above-mentioned (4) prepare, and changes into sealing.
Comparative example 1:
The battery anode slurry preparation method of this comparative example explanation prior art.
Method according to embodiment 1 prepares battery anode slurry and battery, and different is not add dispersant in the anode sizing agent.
The size performance test experiments:
1, viscosity test
Utilize rotation viscometer respectively embodiment 1 slurry and comparative example 1 slurry to be measured, embodiment 1 slurry viscosity: 3500cps, comparative example 1 slurry viscosity: 4200cps.
From data as can be seen, the slurry viscosity of adding dispersant has obvious reduction.
2, deposition test
Slurry packed into seal in the test tube, vertically shelve, test deposition slurry supernatant liquid height accounts for slurry total height ratio with the variation of the time of shelving, the results are shown in Table 1.
Deposition=slurry supernatant liquid height/slurry total height * 100%
Table 1
| Shelve fate | |
Comparative example 1 deposition |
| ??1 | ??4.1％ | ??6.2％ |
| ??2 | ??12.5％ | ??15.3％ |
| ??3 | ??21.7％ | ??25.4％ |
| ??4 | ??33.2％ | ??38.2％ |
| ??5 | ??42.8％ | ??50.6％ |
From table 1 and Fig. 1 as can be seen, the slurry made of embodiment 1 is more stable than comparative example 1 slurry.
3, battery performance test:
1) internal resistance of cell test
Use the internal resistance instrument that every kind of battery is surveyed 8, test result sees Table 2
Table 2
From real data as can be seen, embodiment 1 battery is compared internal resistance with comparative example 1 battery does not have notable difference, and consistency is much better.
2) cycle performance
The battery of embodiment 1 and comparative example 1 preparation is carried out volume test in the environment of normal temperature, relative humidity 25%～45%, method of testing is as follows:
Use secondary cell cycle detection equipment, battery after changing into is changeed the 4.2V constant voltage charge with 2500mA (0.5C) constant current charge to 4.2V, charging cut-off current 100mA is discharged to voltage 3V with 5000mA (1C) then, circulation repeats above-mentioned flow process, writes down each cyclic discharge capacity.
Capability retention=loop ends capacity/initial capacity * 100%
The capability retention test result as shown in Figure 2.
From figure data as can be seen, the battery that the cycle performance of battery that embodiment 1 makes is made significantly better than comparative example 1.
Claims (3)
1, a kind of lithium ion battery anode glue size is characterized in that the prescription of this slurry adopts following components in part by weight:
LiMn2O4: 63-89 part,
Conductive agent: 1.8-3.6 part,
Binding agent: 2.5-4.8 part,
Dispersant: 2-15 part,
Solvent: 58-80 part.
2, lithium ion battery anode glue size according to claim 1 is characterized in that conductive agent is a carbon black, and binding agent is a polyvinylidene fluoride, and dispersant is hypermer kd-1, and solvent is the N-methyl pyrrolidone.
3, the preparation method of the described lithium ion battery anode glue size of claim 1 is characterized in that comprising the following steps:
Binding agent is added solvent, mix and stir 6-8 hour glue, adding LiMn2O4, conductive agent, dispersant stirred 8-12 hour after glue was finished, and made final slurry.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009101814754A CN101609881A (en) | 2009-07-17 | 2009-07-17 | Lithium ion battery anode slurry and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009101814754A CN101609881A (en) | 2009-07-17 | 2009-07-17 | Lithium ion battery anode slurry and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101609881A true CN101609881A (en) | 2009-12-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2009101814754A Pending CN101609881A (en) | 2009-07-17 | 2009-07-17 | Lithium ion battery anode slurry and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101609881A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102270762A (en) * | 2010-06-03 | 2011-12-07 | 清华大学 | Electrode slurry for lithium ion battery and electrode piece made with same |
| CN103545527A (en) * | 2013-10-31 | 2014-01-29 | 河北洁神新能源科技有限公司 | Battery slurry dispersant as well as preparation method and application thereof |
| CN103872306A (en) * | 2014-03-24 | 2014-06-18 | 四川剑兴锂电池有限公司 | Preparation method of lithium titanate negative electrode slurry |
| CN104880384A (en) * | 2015-05-13 | 2015-09-02 | 合肥国轩高科动力能源股份公司 | Evaluation method for lithium ion battery anode paste stability |
| CN106611855A (en) * | 2015-10-22 | 2017-05-03 | 郑州比克电池有限公司 | Polymer lithium ion battery and positive electrode slurry therefor |
-
2009
- 2009-07-17 CN CNA2009101814754A patent/CN101609881A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102270762A (en) * | 2010-06-03 | 2011-12-07 | 清华大学 | Electrode slurry for lithium ion battery and electrode piece made with same |
| US8563171B2 (en) | 2010-06-03 | 2013-10-22 | Tsinghua University | Electrode slurry improving rate performance of lithium battery and electrode of lithium battery |
| CN103545527A (en) * | 2013-10-31 | 2014-01-29 | 河北洁神新能源科技有限公司 | Battery slurry dispersant as well as preparation method and application thereof |
| CN103872306A (en) * | 2014-03-24 | 2014-06-18 | 四川剑兴锂电池有限公司 | Preparation method of lithium titanate negative electrode slurry |
| CN104880384A (en) * | 2015-05-13 | 2015-09-02 | 合肥国轩高科动力能源股份公司 | Evaluation method for lithium ion battery anode paste stability |
| CN106611855A (en) * | 2015-10-22 | 2017-05-03 | 郑州比克电池有限公司 | Polymer lithium ion battery and positive electrode slurry therefor |
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Open date: 20091223 |