CN109509869A - A kind of lithium ion cell positive dry mixing technique - Google Patents
A kind of lithium ion cell positive dry mixing technique Download PDFInfo
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- CN109509869A CN109509869A CN201811445092.9A CN201811445092A CN109509869A CN 109509869 A CN109509869 A CN 109509869A CN 201811445092 A CN201811445092 A CN 201811445092A CN 109509869 A CN109509869 A CN 109509869A
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- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 33
- 238000000034 method Methods 0.000 title claims abstract description 30
- 238000007580 dry-mixing Methods 0.000 title claims abstract description 18
- 238000002156 mixing Methods 0.000 claims abstract description 86
- 239000006185 dispersion Substances 0.000 claims abstract description 46
- 239000002904 solvent Substances 0.000 claims abstract description 23
- 239000002002 slurry Substances 0.000 claims abstract description 19
- 239000006258 conductive agent Substances 0.000 claims abstract description 16
- 239000011230 binding agent Substances 0.000 claims abstract description 12
- 239000011149 active material Substances 0.000 claims abstract description 8
- 238000003756 stirring Methods 0.000 abstract description 33
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 abstract description 13
- 239000000463 material Substances 0.000 abstract description 11
- 239000000843 powder Substances 0.000 abstract description 9
- 238000004090 dissolution Methods 0.000 abstract description 3
- 239000002245 particle Substances 0.000 abstract description 3
- 239000000203 mixture Substances 0.000 abstract 4
- 239000011267 electrode slurry Substances 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 26
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 8
- 239000002033 PVDF binder Substances 0.000 description 8
- 239000003292 glue Substances 0.000 description 8
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 8
- 239000002041 carbon nanotube Substances 0.000 description 7
- 229910021393 carbon nanotube Inorganic materials 0.000 description 7
- 230000000052 comparative effect Effects 0.000 description 7
- 229910002097 Lithium manganese(III,IV) oxide Inorganic materials 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 239000008187 granular material Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000010008 shearing Methods 0.000 description 3
- 229910052493 LiFePO4 Inorganic materials 0.000 description 2
- NIPNSKYNPDTRPC-UHFFFAOYSA-N N-[2-oxo-2-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)ethyl]-2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidine-5-carboxamide Chemical compound O=C(CNC(=O)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F)N1CC2=C(CC1)NN=N2 NIPNSKYNPDTRPC-UHFFFAOYSA-N 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- AFCARXCZXQIEQB-UHFFFAOYSA-N N-[3-oxo-3-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)propyl]-2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidine-5-carboxamide Chemical compound O=C(CCNC(=O)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F)N1CC2=C(CC1)NN=N2 AFCARXCZXQIEQB-UHFFFAOYSA-N 0.000 description 1
- 239000010405 anode material Substances 0.000 description 1
- 239000002134 carbon nanofiber Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 229910021389 graphene Inorganic materials 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000013557 residual solvent Substances 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 239000002023 wood 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
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
- H01M4/139—Processes of manufacture
-
- 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
-
- 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
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
- H01M4/139—Processes of manufacture
- H01M4/1397—Processes of manufacture of electrodes based on inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy
-
- 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
- H01M2004/026—Electrodes composed of, or comprising, active material characterised by the polarity
- H01M2004/028—Positive electrodes
-
- 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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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Battery Electrode And Active Subsutance (AREA)
Abstract
本发明属于锂离子电池技术领域，具体涉及一种锂离子电池正极干法混料工艺，所述的混料工艺包括：(1)向搅拌缸内加入活性物质和粉末状导电剂，搅拌混合；(2)向搅拌缸内加入粘结剂，搅拌混合；(3)向搅拌缸内加入占溶剂总重量50～85％的溶剂，搅拌混合；(4)向搅拌缸内加入浆料状导电剂，抽真空，搅拌混合；(5)加入剩余的溶剂，继续抽真空，搅拌混合，得到锂离子电池正极浆料；本发明先进行粉料高速混合，再加入适量溶剂使粉状物料润湿，低速搅拌形成高粘度浆料；之后通过高速分散形成的剪切力进一步破碎团聚颗粒、加速溶解粘结剂和均匀分散物料；通过对加料顺序和混料工艺条件的控制，使得物料混匀，提高了浆料的稳定性和混料效率。The invention belongs to the technical field of lithium ion batteries, and in particular relates to a dry mixing process for positive electrodes of lithium ion batteries. The mixing process includes: (1) adding an active material and a powdery conductive agent into a stirring cylinder, and stirring and mixing; (2) Add the binder into the stirring cylinder, stir and mix; (3) Add the solvent accounting for 50-85% of the total solvent weight into the stirring cylinder, and stir and mix; (4) Add the slurry conductive agent into the stirring cylinder , vacuumize, stir and mix; (5) add the remaining solvent, continue to vacuumize, stir and mix to obtain a positive electrode slurry for lithium ion batteries; the present invention firstly performs high-speed mixing of powder materials, and then adds an appropriate amount of solvent to wet the powder materials, Low-speed stirring to form high-viscosity slurry; then, the shear force formed by high-speed dispersion further breaks the agglomerated particles, accelerates the dissolution of the binder and uniformly disperses the material; through the control of the feeding sequence and the mixing process conditions, the material is mixed evenly and improved. The stability and mixing efficiency of the slurry are improved.
Description
Technical field
The invention belongs to technical field of lithium ion, and in particular to a kind of lithium ion cell positive dry mixing technique.
Background technique
Lithium ion battery have many advantages, such as energy density it is high, it is environmental-friendly, have extended cycle life, in 3C number, energy storage, electronic
The fields such as tool, communications and transportation have a wide range of applications.Making technology has the quality of lithium ion battery great influence,
Mixing is the first step of entire making technology, there is important influence to the quality of subsequent technique and lithium ion battery.
Traditional method for mixing of anode material for lithium-ion batteries is material by wet type mixing, concrete mode are as follows: by solvent and binder
It is first mixed, glue is made, then be gradually added conductive agent, the powder body materials such as active material, there are conductive agents, activity for this method
The drawback of the powder body materials such as substance dispersion effect difference in low viscosity glue, while being influenced by binder dissolution characteristics, it is whole
A glue process needs 8-10 hours, takes a long time, mixing low efficiency.
Summary of the invention
It is an object of the invention to overcome deficiency in the prior art, a kind of lithium ion cell positive dry mixing work is provided
Skill solves the problem of existing method for mixing low efficiency bad dispersibility.
To achieve the goals above, the present invention is achieved by the following scheme:
A kind of lithium ion cell positive dry mixing technique, comprising the following steps:
(1) active material and powdered conductive agent are added into a mixing bowl, is stirred；
(2) binder is added into a mixing bowl, is stirred；
(3) solvent for accounting for solvent total weight 50~85% is added into a mixing bowl, is stirred；
(4) pulp-like conductive agent is added into a mixing bowl, is evacuated to -0.085~-0.1MPa, is stirred；
(5) remaining solvent is added, continues to be evacuated to -0.085~-0.1MPa, be stirred, obtain lithium ion battery
Anode sizing agent.
Preferably, in step (1), the condition being stirred includes that mixing speed is 20~25rpm, rate of dispersion
For 1500~1800rpm, being stirred the time is 10~20 minutes.
Preferably, in step (2), the condition being stirred includes that mixing speed is 25~30rpm, rate of dispersion
For 1500~1800rpm, being stirred the time is 10~20 minutes.
Preferably, in step (3), the condition being stirred includes that mixing speed is 25~30rpm, rate of dispersion
For 300~400rpm, being stirred the time is 30 minutes.
Preferably, in step (4), the condition being stirred includes that mixing speed is 33~38rpm, rate of dispersion
For 1500~1800rpm, being stirred the time is 120~180 minutes.
Preferably, in step (5), the condition being stirred includes that mixing speed is 20~25rpm, rate of dispersion
For 200~300rpm, being stirred the time is 30~60 minutes.
Compared with prior art, the present invention has following technical effect that
Lithium ion cell positive dry mixing technique provided by the invention, first step by step be added active material, conductive agent and
Binder carries out powder mixed at high speed, can make the sufficiently broken dispersion of conductive agent aggregate, dry powder high-speed stirred is realized microcosmic mixed
It closes, to form good conductive network；Adding appropriate solvent soaks granular material, stirs at low speed to form high viscosity slurry
Material；Pulp-like conductive agent is supplemented later and the shearing force formed by high speed dispersion is further crushed agglomerated particle, accelerates to dissolve
Binder and evenly dispersed material；Finally supplement residual solvent adjustment viscosity obtains lithium ion battery anode glue size.
The present invention is by the control to charging sequence and mixing procedure condition, so that granular material mixes well, improves
The stability and mixing efficiency of slurry.
Specific embodiment
In order to be easy to understand the technical means, the creative features, the aims and the efficiencies achieved by the present invention, tie below
Specific embodiment is closed, the present invention is furture elucidated.
All raw materials in the present invention, are not particularly limited its source, buying on the market or according to this field skill
The preparation of conventional method known to art personnel.
All raw materials in the present invention, are not particularly limited its purity, and present invention preferably employs analyze pure or composite wood
The conventional purity that material field uses.
In order to solve existing method for mixing inefficiency, the technical issues of bad dispersibility, the present invention provides a kind of lithium from
Sub- anode dry mixing technique, comprising the following steps:
(1) active material and powdered conductive agent, low whipping speed 20 are added into a mixing bowl of planetary stirring machine
~25rpm, rate of dispersion are stirred 10~20 minutes under conditions of being 1500~1800rpm；
(2) binder is added into a mixing bowl, low whipping speed is 25~30rpm, and rate of dispersion is 1500~1800rpm
Under conditions of be stirred 10~20 minutes；
(3) solvent for accounting for solvent total weight 50~85% is added into a mixing bowl, low whipping speed is 25~30rpm, point
It dissipates under conditions of speed is 300~400rpm and is stirred 30 minutes；
(4) pulp-like conductive agent is added into a mixing bowl, is evacuated to -0.085~-0.1MPa, low whipping speed 33
~38rpm, rate of dispersion are stirred 120~180 minutes under conditions of being 1500~1800rpm；
(5) remaining solvent is added, continues to be evacuated to -0.085~-0.1MPa, low whipping speed is 20~25rpm,
Rate of dispersion is stirred 30~60 minutes under conditions of being 200~300rpm, obtains lithium ion battery anode glue size.
According to the present invention, the present invention does not do particular determination to the type of the active material and powdered conductive agent, can
Think it is well known to those skilled in the art, for example, the active material is LiMn2O4, ternary material, LiFePO4
One or more combinations；The powdered conductive agent is one or more combinations of KS-6, S-O, VGCF, Super P.
According to the present invention, in the present invention, the pulp-like conductive agent is carbon nanotube, one or two kinds of groups of graphene
It closes.
Heretofore described solvent selection prepares the common solvent of lithium ion battery anode glue size, example solvent as mentioned
For NMP；
Heretofore described binder selection prepares the common binder of lithium ion battery anode glue size, and example is as mentioned
Binder is PVDF.
Lithium ion cell positive dry mixing technique provided by the invention is made into one below by way of specific embodiment
The explanation of step.
Embodiment 1
A kind of lithium ion cell positive dry mixing technique, comprising the following steps:
(1) LiMn2O4, Super P and KS-6 powder are added in a mixing bowl of planetary stirring machine, mixing speed
20rpm, rate of dispersion 1650rpm open recirculated water, stir 10 minutes；
(2) PVDF, mixing speed 28rpm, rate of dispersion 1650rpm are added into a mixing bowl, opens recirculated water, stirring 20
Minute；
(3) NMP, mixing speed 30rpm, the rate of dispersion 400rpm for accounting for solvent total weight 68% are added into a mixing bowl,
Recirculated water is opened, is stirred 30 minutes；
(4) carbon nanotube conducting slurry is added into a mixing bowl, mixing speed 35rpm, rate of dispersion 1760rpm are opened
Recirculated water vacuumizes -0.085~-0.1MPa, stirs 165 minutes；
(5) residue NMP, mixing speed 20rpm, rate of dispersion 220rpm is added, opens recirculated water, vacuumizes -0.085
~-0.1MPa is stirred 45 minutes.
Embodiment 2
A kind of lithium ion cell positive dry mixing technique, comprising the following steps:
(1) LiMn2O4, ternary and Super P powder are added in a mixing bowl of planetary stirring machine, mixing speed
20rpm, rate of dispersion 1570rpm open recirculated water, stir 15 minutes；
(2) PVDF, mixing speed 25rpm, rate of dispersion 1600rpm are added into a mixing bowl, opens recirculated water, stirring 20
Minute；
(3) NMP, mixing speed 30rpm, the rate of dispersion 400rpm for accounting for solvent total weight 62% are added into a mixing bowl,
Recirculated water is opened, is stirred 30 minutes；
(4) carbon nanotube conducting slurry is added into a mixing bowl, is evacuated to -0.085~-0.1MPa, mixing speed
38rpm, rate of dispersion 1750rpm open recirculated water, stir 150 minutes；
(5) residue NMP, mixing speed 22rpm, rate of dispersion 200rpm is added, opens recirculated water, vacuumizes -0.085
~-0.1MPa is stirred 40 minutes.
Embodiment 3
A kind of lithium ion cell positive dry mixing technique, comprising the following steps:
(1) LiFePO4, ternary and Super P powder are added in a mixing bowl of planetary stirring machine, mixing speed
22rpm, rate of dispersion 1630rpm open recirculated water, stir 15 minutes；
(2) PVDF, mixing speed 30rpm, rate of dispersion 1680rpm are added into a mixing bowl, opens recirculated water, stirring 15
Minute；
(3) NMP, mixing speed 28rpm, the rate of dispersion 380rpm for accounting for solvent total weight 72% are added into a mixing bowl,
Recirculated water is opened, is stirred 30 minutes；
(4) carbon nanotube conducting slurry is added into a mixing bowl, is evacuated to -0.085~-0.1MPa, mixing speed
38rpm, rate of dispersion 1640rpm open recirculated water, stir 150 minutes；
(5) residue NMP is added, vacuumizes -0.085~-0.1MPa, mixing speed 22rpm, rate of dispersion 260rpm is opened
Recirculated water is opened, is stirred 50 minutes.
Comparative example 1
A kind of lithium ion cell positive mixing procedure, comprising the following steps:
(1) by LiMn2O4, ternary, Super P, PVDF and the NMP addition planetary stirring machine for accounting for solvent total weight 65%
A mixing bowl in, mixing speed 30rpm, rate of dispersion 400rpm, open recirculated water, stir 60 minutes；
(2) carbon nanotube conducting slurry is added into a mixing bowl, mixing speed 38rpm, rate of dispersion 1750rpm take out true
- 0.085~-0.1MPa of sky opens recirculated water, stirs 180 minutes；
(3) residue NMP, mixing speed 22rpm, rate of dispersion 200rpm is added, opens recirculated water, vacuumizes -0.085
~-0.1MPa is stirred 40 minutes.
Comparative example 2
A kind of lithium ion cell positive mixing procedure, comprising the following steps:
(1) LiMn2O4, ternary and PVDF are added in a mixing bowl of planetary stirring machine, mixing speed 30rpm, dispersion speed
400rpm is spent, recirculated water is opened, is stirred 50 minutes；
(2) by Super P, carbon nanotube conducting slurry and the NMP mixing speed 28rpm for accounting for solvent total weight 75%, divide
Speed 350rpm is dissipated, recirculated water is opened, is stirred 60 minutes；
(3) mixing speed 38rpm, rate of dispersion 1750rpm vacuumize -0.085~-0.1MPa, open recirculated water, stir
150 minutes；
(4) residue NMP, mixing speed 22rpm, rate of dispersion 250rpm is added, opens recirculated water, vacuumizes -0.085
~-0.1MPa is stirred 40 minutes.
Comparative example 3
A kind of lithium ion cell positive mixing procedure, comprising the following steps:
(1) by the addition a mixing bowl of PVDF and whole NMP planetary stirring machines, mixing speed 30rpm, rate of dispersion
1380rpm opens recirculated water, stirs 240 minutes；
(2) LiMn2O4, ternary, Super P are added in a mixing bowl, mixing speed 35rpm, rate of dispersion 1550rpm are opened
Recirculated water is opened, -0.085~-0.1MPa is vacuumized, is stirred 180 minutes；
(3) carbon nanotube conducting slurry is added into a mixing bowl, mixing speed 38rpm, rate of dispersion 1550rpm take out true
- 0.085~-0.1MPa of sky opens recirculated water, stirs 90 minutes；
(4) mixing speed 20rpm, rate of dispersion 250rpm open recirculated water, vacuumize -0.085--0.1MPa, stir
30 minutes.
The mixing time of embodiment 1-3, comparative example 1-3, slurry fineness, viscosity and viscosity change are tested, as a result
Such as table 1.
1 mixing time of table and size performance test result
As can be seen from Table 1, the size performance that 1-3 of the embodiment of the present invention is obtained is substantially better than comparative example 1-3.
The present invention is sufficiently effective by the shearing force that granular material high speed dispersion and highly viscous slurry, high dispersive speed are formed
Break up agglomerates, realize the microcosmic uniform mixing of particle, obtained slurry fineness is good, and viscosity stability is high, while it is time-consuming compared with
It is short.Comparative example 1-2 equally uses granular material and highly viscous slurry high speed dispersion, but thin in slurry because feeding sequence is different
Less than having in terms of degree and Stability of Slurry.Comparative example 3 uses conventional wet lay mixing, and glue viscosity low-shearing force is insufficient, dispersion
Effect is poor, therefore Stability of Slurry is bad, simultaneously because PVDF dissolution is slowly, time-consuming for entire ingredient.
Basic principles and main features and the features of the present invention of the invention have been shown and described above.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the above embodiments and description only describe this
The principle of invention, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these changes
Change and improvement is both fallen in the range of claimed invention.The scope of protection of present invention is by appended claims
And its equivalent thereof.
Claims (6)
1. a kind of lithium ion cell positive dry mixing technique, it is characterised in that: the following steps are included:
(1) active material and powdered conductive agent are added into a mixing bowl, is stirred；
(2) binder is added into a mixing bowl, is stirred；
(3) solvent for accounting for solvent total weight 50~85% is added into a mixing bowl, is stirred；
(4) pulp-like conductive agent is added into a mixing bowl, is evacuated to -0.085~-0.1MPa, is stirred；
(5) remaining solvent is added, continues to be evacuated to -0.085~-0.1MPa, be stirred, obtain lithium ion cell positive
Slurry.
2. lithium ion cell positive dry mixing technique according to claim 1, it is characterised in that: described in step (1)
The condition being stirred includes, and mixing speed is 20~25rpm, and rate of dispersion is 1500~1800rpm, is stirred the time and is
10~20 minutes.
3. lithium ion cell positive dry mixing technique according to claim 1, it is characterised in that: described in step (2)
The condition being stirred includes, and mixing speed is 25~30rpm, and rate of dispersion is 1500~1800rpm, is stirred the time and is
10~20 minutes.
4. lithium ion cell positive dry mixing technique according to claim 1, it is characterised in that: described in step (3)
The condition being stirred includes that mixing speed is 25~30rpm, and rate of dispersion is 300~400rpm, and being stirred the time is 30
Minute.
5. lithium ion cell positive dry mixing technique according to claim 1, it is characterised in that: described in step (4)
The condition being stirred includes, and mixing speed is 33~38rpm, and rate of dispersion is 1500~1800rpm, is stirred the time and is
120~180 minutes.
6. lithium ion cell positive dry mixing technique according to claim 1, it is characterised in that: described in step (5)
The condition being stirred includes that mixing speed is 20~25rpm, and rate of dispersion is 200~300rpm, and being stirred the time is 30
~60 minutes.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110416486A (en) * | 2019-07-25 | 2019-11-05 | 福建南平南孚电池有限公司 | Method for mixing, anode and the alkaline battery of the positive electrode of alkaline battery |
| CN110459410A (en) * | 2019-07-24 | 2019-11-15 | 中国科学院山西煤炭化学研究所 | A preparation method of supercapacitor slurry and supercapacitor prepared by using supercapacitor slurry |
| CN111933938A (en) * | 2020-06-29 | 2020-11-13 | 宁波新思创机电科技股份有限公司 | Preparation method of ternary cathode slurry |
| CN115050949A (en) * | 2022-08-11 | 2022-09-13 | 楚能新能源股份有限公司 | Positive electrode slurry, preparation method thereof and lithium ion battery |
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| CN111933938B (en) * | 2020-06-29 | 2022-08-12 | 宁波新思创机电科技股份有限公司 | Preparation method of ternary cathode slurry |
| CN115050949A (en) * | 2022-08-11 | 2022-09-13 | 楚能新能源股份有限公司 | Positive electrode slurry, preparation method thereof and lithium ion battery |
| CN115050949B (en) * | 2022-08-11 | 2022-11-04 | 楚能新能源股份有限公司 | Positive electrode slurry, preparation method thereof and lithium ion battery |
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