CN106611855A - Polymer lithium ion battery and positive electrode slurry therefor - Google Patents
Polymer lithium ion battery and positive electrode slurry therefor Download PDFInfo
- Publication number
- CN106611855A CN106611855A CN201510694352.6A CN201510694352A CN106611855A CN 106611855 A CN106611855 A CN 106611855A CN 201510694352 A CN201510694352 A CN 201510694352A CN 106611855 A CN106611855 A CN 106611855A
- Authority
- CN
- China
- Prior art keywords
- ion battery
- lithium ion
- dispersant
- polymer
- anode
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 229920000642 polymer Polymers 0.000 title claims abstract description 44
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 38
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 23
- 239000011267 electrode slurry Substances 0.000 title abstract 4
- 239000002270 dispersing agent Substances 0.000 claims abstract description 37
- 239000006258 conductive agent Substances 0.000 claims abstract description 26
- 239000011230 binding agent Substances 0.000 claims abstract description 21
- 239000007774 positive electrode material Substances 0.000 claims abstract description 20
- 239000002904 solvent Substances 0.000 claims abstract description 17
- 239000002002 slurry Substances 0.000 claims description 17
- 239000000203 mixture Substances 0.000 claims description 6
- 239000001267 polyvinylpyrrolidone Substances 0.000 claims description 5
- 235000013855 polyvinylpyrrolidone Nutrition 0.000 claims description 5
- 229920000036 polyvinylpyrrolidone Polymers 0.000 claims description 5
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical group CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 claims description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 3
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 3
- 239000006230 acetylene black Substances 0.000 claims description 3
- 239000002253 acid Substances 0.000 claims description 3
- 229910017052 cobalt Inorganic materials 0.000 claims description 3
- 239000010941 cobalt Substances 0.000 claims description 3
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims description 3
- 229910052744 lithium Inorganic materials 0.000 claims description 3
- OVAQODDUFGFVPR-UHFFFAOYSA-N lithium cobalt(2+) dioxido(dioxo)manganese Chemical compound [Li+].[Mn](=O)(=O)([O-])[O-].[Co+2] OVAQODDUFGFVPR-UHFFFAOYSA-N 0.000 claims description 3
- 230000034964 establishment of cell polarity Effects 0.000 abstract 1
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 239000003795 chemical substances by application Substances 0.000 description 12
- 238000004513 sizing Methods 0.000 description 12
- 230000000694 effects Effects 0.000 description 6
- 230000014759 maintenance of location Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 230000010287 polarization Effects 0.000 description 4
- 238000011084 recovery Methods 0.000 description 4
- 239000011149 active material Substances 0.000 description 3
- 239000006185 dispersion Substances 0.000 description 3
- 230000032683 aging Effects 0.000 description 2
- 239000006256 anode slurry Substances 0.000 description 2
- 239000006257 cathode slurry Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 239000007773 negative electrode material Substances 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 239000002562 thickening agent Substances 0.000 description 2
- 239000010405 anode material Substances 0.000 description 1
- VYQRBKCKQCRYEE-UHFFFAOYSA-N ctk1a7239 Chemical compound C12=CC=CC=C2N2CC=CC3=NC=CC1=C32 VYQRBKCKQCRYEE-UHFFFAOYSA-N 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- 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
- H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
-
- 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
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Battery Electrode And Active Subsutance (AREA)
Abstract
The invention discloses a polymer lithium ion battery and positive electrode slurry therefor. The positive electrode slurry comprises a positive electrode active material, a conductive agent, a binder, a dispersing agent and a solvent at the ratio of 100 to (0.6-1.3) to (1.0-1.4) to (0.02-0.2) to (12-40) in sequence. By mixing the dispersing agent, which is prepared based on certain proportion, in the positive electrode slurry, the positive electrode active material and the conductive agent of the polymer lithium ion battery are fully dispersed, so that cell polarization is lowered, and the cycle life is prolonged.
Description
Technical field
The present invention relates to polymer Li-ion battery technical field, and in particular to a kind of anode of polymer lithium ion battery slurry and polymer Li-ion battery.
Background technology
Polymer Li-ion battery has the advantages that energy density is high, has a safety feature, can thin type and shape it is customizable, and be more and more applied in electronic product.At present anode of polymer lithium ion battery slurry generally uses oiliness technique, with NMP as solvent, is uniformly disperseed anode material and a certain proportion of conductive agent and binding agent using dispersing apparatus.The proportioning of anode sizing agent and scattered effect directly influence the performances such as energy density, cycle life, multiplying power and the storage of battery core, so suitable anode sizing agent is most important to polymer battery core.Existing anode sizing agent technique is difficult the activity substance content for improving positive pole, and large-scale dispersing apparatus cannot be dispersed well by conductive agent, cause polymer lithium ion battery electric core to have polarization increase, low appearance and cycle life decay very fast etc..
The content of the invention
The application provides a kind of anode of polymer lithium ion battery slurry and polymer Li-ion battery that a kind of active material dispersion effect is good, the little and cycle life of battery core polarization is high.
According in a first aspect, a kind of anode of polymer lithium ion battery slurry is provided in a kind of embodiment, it includes positive active material, conductive agent, binding agent, solvent and dispersant, its ratio is positive active material：Conductive agent：Binding agent：Dispersant：Solvent=100:(0.6~1.3):(1.0~1.4):(0.02~0.2):(12~40).
Further, positive active material is one or two mixture in cobalt acid lithium or nickle cobalt lithium manganate.
Further, conductive agent is the mixture of one or more in conductive black, acetylene black and CNT.
Further, binding agent is Kynoar.
Further, solvent is 1-METHYLPYRROLIDONE.
Further, dispersant is polyvinylpyrrolidone.
According to second aspect, a kind of polymer Li-ion battery is provided in a kind of embodiment, it includes above-mentioned anode of polymer lithium ion battery slurry.
According to a kind of anode of polymer lithium ion battery slurry and polymer Li-ion battery of above-described embodiment, due to being mixed with dispersant in anode sizing agent, and dispersant is prepared in specific proportions, so that the positive active material and conductive agent of polymer Li-ion battery obtain fully dispersed, battery core polarization is reduced, and improves service life cycle.
Description of the drawings
Fig. 1 is the capability retention and the schematic diagram of recovery rate of polymer Li-ion battery in an embodiment of the present invention；
Fig. 2 is the schematic diagram of the internal resistance rate of change of polymer Li-ion battery in an embodiment of the present invention；
Fig. 3 is the schematic diagram of anode of polymer lithium ion battery active material gram volume in another kind embodiment of the invention.
Specific embodiment
Accompanying drawing is combined below by specific embodiment to be described in further detail the present invention.
Embodiment one：
In a kind of anode of polymer lithium ion battery slurry provided in an embodiment of the present invention, it includes positive active material, conductive agent, binding agent, solvent and dispersant, and its ratio is positive active material：Conductive agent：Binding agent：Dispersant：Solvent=100:(0.6~1.3):(1.0~1.4):(0.02~0.2):(12~40).
Wherein positive active material is one or two mixture in cobalt acid lithium or nickle cobalt lithium manganate, conductive agent is the mixture of one or more in conductive black, acetylene black and CNT, binding agent is Kynoar, solvent is 1-METHYLPYRROLIDONE, dispersant is modified polyvinylpyrrolidone, polyvinylpyrrolidone is by the change of molecular structure or inserts other molecular structures and realizes modified, and modified polyvinylpyrrolidone dispersion effect is more preferable.
A kind of anode of polymer lithium ion battery slurry that the present embodiment is provided, due to being mixed with dispersant in anode sizing agent, and dispersant is prepared in specific proportions, so that in the case that polymer lithium ion battery electric core capacity is basically unchanged, improve the dispersion effect of active material, battery core polarization is reduced, and improves service life cycle.
Embodiment two：
A kind of polymer Li-ion battery is present embodiments provided, polymer Li-ion battery includes the anode of polymer lithium ion battery slurry of above-described embodiment, and wherein anode sizing agent increased on the basis of existing technology dispersant.The making of polymer Li-ion battery and test process are as follows：
It is prepared by S101, anode sizing agent；
Anode sizing agent is put into be stirred in refiner according to a certain percentage and is mixed by positive active material, conductive agent, binding agent, solvent and dispersant, and wherein ratio is positive active material：Conductive agent：Binding agent：Dispersant：Solvent=100:(0.7~1.3):(1.3~1.4):(0.02~0.06):(12~40).
It is prepared by S102, cathode size；
Cathode size is put into be stirred in refiner according to a certain percentage and is mixed by negative electrode active material, conductive agent, thickener, binding agent and solvent.
The making of S103, battery core；
By anode and cathode slurry by being coated with, roll, cut, wind, fluid injection sealing, the operation such as ageing and preliminary filling make battery core.
The partial volume of S104, battery core；
The battery core made carries out partial volume with the electric current of 0.2C and 0.5C, and the capacity for obtaining polymer battery core plays result.
S105, high temperature storage；
Full battery core is placed 7 days in 60 DEG C of baking oven.
S106, test.
The voltage of test polymer battery core, internal resistance, capability retention and capacity restoration rate etc., while carrying out the electric performance tests such as multiplying power, high/low temperature, circulation.
As shown in Figure 1, ordinate is the capability retention and recovery rate of battery core, 1 is before high temperature storage in abscissa, battery core A without dispersant and have dispersant battery core B capability retention and recovery rate, in abscissa 2 place 7 days in 60 DEG C of baking oven for battery core after, battery core A without dispersant and have dispersant battery core B capability retention and recovery rate.After as seen from the figure battery core is placed 7 days in 60 DEG C of baking oven, there is its capacity restoration of the battery core of dispersant better than the battery core for not adding dispersant.
As shown in Figure 2, ordinate is the internal resistance rate of change of battery core, A represents the internal resistance rate of change of the battery core without dispersant in 7 days storing process, B represents the internal resistance rate of change of the battery core for having dispersant in storing process at 7 days, it is known that the internal resistance rate of change for having battery core made by dispersant is significantly lower than the internal resistance rate of change without dispersant.
In sum, the anode sizing agent of the polymer battery that the present embodiment is provided adds in specific proportions positive active material and conductive agent after dispersant to obtain fully dispersed so that the capacity restoration and internal resistance rate of change of battery core significantly improves.
Embodiment three：
The present embodiment reduces conductive agent and binding agent usage amount on the basis of above-described embodiment two, improves the usage amount of dispersant.
The making of polymer Li-ion battery and test process are as follows：
It is prepared by S201, anode sizing agent；
Anode sizing agent is put into be stirred in refiner according to a certain percentage and is mixed by positive active material, conductive agent, binding agent, solvent and dispersant, and wherein ratio is positive active material：Conductive agent：Binding agent：Dispersant：Solvent=100:(0.6~0.7):(1.0~1.3):(0.06~0.2):(12~40).
It is prepared by S202, cathode size；
Cathode size is put into be stirred in refiner according to a certain percentage and is mixed by negative electrode active material, conductive agent, thickener, binding agent and solvent.
The making of S203, battery core；
By anode and cathode slurry by being coated with, roll, cut, wind, fluid injection sealing, the operation such as ageing and preliminary filling make battery core.
The partial volume of S204, battery core；
The battery core made carries out partial volume with the electric current of 0.2C and 0.5C, and the capacity for obtaining polymer battery core plays result.
S205, high temperature storage；
Full battery core is placed 7 days in 60 DEG C of baking oven.
S206, test.
The voltage of test polymer battery core, internal resistance, capability retention and capacity restoration rate etc., while carrying out the electric performance tests such as multiplying power, high/low temperature, circulation.
As shown in figure 3, ordinate is positive active material gram volume（mAh/g）, wherein A indicates the positive active material gram volume of the battery core without dispersant（mAh/g）, average is 166.864mAh/g；The positive active material gram volume that B indicates dispersant and conductive agent and binding agent usage amount are reduced（mAh/g）, average is 166.631mAh/g.Anode sizing agent does not add dispersant and adds after dispersant and reduce the comparison diagram that positive pole gram volume is played after conductive agent consumption, and the amount of conductive agent and binding agent is reduced after dispersant is added, and the capacity of battery core is wielded influence less.And other performance parameters of battery core are consistent with above-described embodiment two.It is relatively costly because of conductive agent and binding agent, therefore the present embodiment has saved cost in the case where same battery core effect is met.
Use above specific case is illustrated to the present invention, is only intended to help and understands the present invention, not to limit the present invention.For those skilled in the art, according to the thought of the present invention, some simple deductions, deformation can also be made or replaced.
Claims (7)
1. a kind of anode of polymer lithium ion battery slurry, it is characterised in that including positive active material, conductive agent, binding agent, solvent and dispersant, its ratio is positive active material：Conductive agent：Binding agent：Dispersant：Solvent=100:(0.6~1.3):(1.0~1.4):(0.02~0.2):(12~40).
2. anode of polymer lithium ion battery slurry as claimed in claim 1, it is characterised in that the positive active material is one or two mixture in cobalt acid lithium or nickle cobalt lithium manganate.
3. anode of polymer lithium ion battery slurry as claimed in claim 1, it is characterised in that the conductive agent is the mixture of one or more in conductive black, acetylene black and CNT.
4. anode of polymer lithium ion battery slurry as claimed in claim 1, it is characterised in that the binding agent is Kynoar.
5. anode of polymer lithium ion battery slurry as claimed in claim 1, it is characterised in that the solvent is 1-METHYLPYRROLIDONE.
6. anode of polymer lithium ion battery slurry as claimed in claim 1, it is characterised in that the dispersant is polyvinylpyrrolidone.
7. a kind of polymer Li-ion battery, it is characterised in that including the anode of polymer lithium ion battery slurry described in any one in claim 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510694352.6A CN106611855A (en) | 2015-10-22 | 2015-10-22 | Polymer lithium ion battery and positive electrode slurry therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510694352.6A CN106611855A (en) | 2015-10-22 | 2015-10-22 | Polymer lithium ion battery and positive electrode slurry therefor |
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| Publication Number | Publication Date |
|---|---|
| CN106611855A true CN106611855A (en) | 2017-05-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510694352.6A Pending CN106611855A (en) | 2015-10-22 | 2015-10-22 | Polymer lithium ion battery and positive electrode slurry therefor |
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| Country | Link |
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| CN (1) | CN106611855A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108155358A (en) * | 2017-12-11 | 2018-06-12 | 浙江天能能源科技股份有限公司 | A kind of preparation method of lithium ion battery nickle cobalt lithium manganate anode composite material |
| CN109904387A (en) * | 2019-02-25 | 2019-06-18 | 天津艾克凯胜石墨烯科技有限公司 | A kind of high-performance lithium anode piece preparation method |
| CN111628175A (en) * | 2020-06-05 | 2020-09-04 | 淮北市吉耐新材料科技有限公司 | Conductive slurry based on carbon nano tube and preparation process thereof |
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| CN101567469A (en) * | 2008-07-08 | 2009-10-28 | 周雨方 | Power polymer lithium ion battery and fabricating process thereof |
| CN101609881A (en) * | 2009-07-17 | 2009-12-23 | 江苏富朗特新能源有限公司 | Lithium ion battery anode slurry and preparation method thereof |
| CN101651236A (en) * | 2009-08-31 | 2010-02-17 | 杭州万马高能量电池有限公司 | Fast chargeable lithium iron phosphate polymer lithium ion battery with ultra-high magnifications and manufacturing method thereof |
| CN102237521A (en) * | 2010-04-29 | 2011-11-09 | 上海比亚迪有限公司 | Lithium ion battery anode slurry, anode and battery |
| CN103199258A (en) * | 2013-03-07 | 2013-07-10 | 中航锂电（洛阳）有限公司 | Cathode material of lithium ion battery, preparation method of cathode, and lithium ion battery |
-
2015
- 2015-10-22 CN CN201510694352.6A patent/CN106611855A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101567469A (en) * | 2008-07-08 | 2009-10-28 | 周雨方 | Power polymer lithium ion battery and fabricating process thereof |
| CN101609881A (en) * | 2009-07-17 | 2009-12-23 | 江苏富朗特新能源有限公司 | Lithium ion battery anode slurry and preparation method thereof |
| CN101651236A (en) * | 2009-08-31 | 2010-02-17 | 杭州万马高能量电池有限公司 | Fast chargeable lithium iron phosphate polymer lithium ion battery with ultra-high magnifications and manufacturing method thereof |
| CN102237521A (en) * | 2010-04-29 | 2011-11-09 | 上海比亚迪有限公司 | Lithium ion battery anode slurry, anode and battery |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108155358A (en) * | 2017-12-11 | 2018-06-12 | 浙江天能能源科技股份有限公司 | A kind of preparation method of lithium ion battery nickle cobalt lithium manganate anode composite material |
| CN109904387A (en) * | 2019-02-25 | 2019-06-18 | 天津艾克凯胜石墨烯科技有限公司 | A kind of high-performance lithium anode piece preparation method |
| CN111628175A (en) * | 2020-06-05 | 2020-09-04 | 淮北市吉耐新材料科技有限公司 | Conductive slurry based on carbon nano tube and preparation process thereof |
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