CN108649185A - A kind of solid-state preparation method, pole piece and the lithium ion battery of electrodes of lithium-ion batteries - Google Patents
A kind of solid-state preparation method, pole piece and the lithium ion battery of electrodes of lithium-ion batteries Download PDFInfo
- Publication number
- CN108649185A CN108649185A CN201810377164.4A CN201810377164A CN108649185A CN 108649185 A CN108649185 A CN 108649185A CN 201810377164 A CN201810377164 A CN 201810377164A CN 108649185 A CN108649185 A CN 108649185A
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- China
- Prior art keywords
- lithium
- electrodes
- powder
- solid
- ion batteries
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- 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
- H01M4/04—Processes of manufacture in general
- H01M4/0402—Methods of deposition of the material
- H01M4/0419—Methods of deposition of the material involving spraying
-
- 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
-
- 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 present invention provides a kind of solid-state preparation methods of electrodes of lithium-ion batteries comprising following steps：1) powder active material and powder conductive agent solid-state are mixed, forms mixed powder；2) on a current collector by conductive glue；3) it will be coated on the collector of conducting resinl in mixed powder uniform fold to step 2) made from step 1), pole piece obtained after conducting resinl solidification.The present invention also provides a kind of electrodes of lithium-ion batteries and a kind of lithium ion battery.The present invention simplifies process route compared to the prior art, effectively improves preparation efficiency.And preparation process can carry out at room temperature, save the input of the energy and drying equipment.
Description
Technical field
The present invention relates to field of lithium ion battery, in particular to a kind of solid-state preparation side of electrodes of lithium-ion batteries
Method, pole piece and lithium ion battery.
Background technology
Currently, the preparation method of electrodes of lithium-ion batteries is slurry stability is good, with certain viscosity value, good fluidity
Material is uniformly coated on positive and negative anodes collector, then removes the solvent in slurry by drying.However, in coating and drying course
In, the slurry of fluidised form is easy to happen movement, it is difficult to ensure that active material is lateral, longitudinal direction surface density consistent in pole piece, and pole piece
Impurity has been easy in before drying to be mixed into.
It is typically first that binder is molten in order to form slurry meanwhile in the preparation process of current electrodes of lithium-ion batteries
Solution in a solvent, forms sticky glue, in binder course of dissolution, generally at least needs the stirring of 2 hours that can just fill
Divide dissolving, can just be mixed into other powders later and be stirred, whipping process is complex and time-consuming so that preparation efficiency is not
It is high.
Invention content
In consideration of it, the present invention provides a kind of preparations of the solid-state of electrodes of lithium-ion batteries can effectively improve preparation efficiency
Method, pole piece and lithium ion battery.
On the one hand, the present invention provides a kind of solid-state preparation methods of electrodes of lithium-ion batteries comprising following steps：
1) powder active material and powder conductive agent solid-state are mixed, forms mixed powder；
2) on a current collector by conductive glue；
3) it will be coated on the collector of conducting resinl in mixed powder uniform fold to step 2) made from step 1), it is conductive
Pole piece is obtained after gelling is solid.
Further, above-mentioned steps 1) in, powder active material and powder conductive agent are formed after mechanical agitation mixes
Mixed powder.
Further, above-mentioned steps 1) in, powder active material and powder conductive agent by ball mill it is mixed after formed and mix
Powder.
Further, above-mentioned steps 2) in, conducting resinl is coated on a current collector by coating device.
Further, the thickness of above-mentioned conducting resinl is no more than 100 μm.
Further, above-mentioned steps 3) in, on mixed powder uniform fold to the collector for be coated with conducting resinl after, into
Row rolling operation.
Further, above-mentioned steps 3) in, after rolling operation, remove unstuck powder.
Further, above-mentioned steps 3) in, mixed powder passes through air-flow even application to the collector for being coated with conducting resinl
On.
On the other hand, the present invention provides a kind of electrodes of lithium-ion batteries, including collector and electrode material, electrode materials
Including powder active material and powder conductive agent, pass through a kind of solid-state preparation method system of above-mentioned electrodes of lithium-ion batteries
At.
In another aspect, the present invention provides a kind of lithium ion battery, including battery body, the battery body include above-mentioned
A kind of electrodes of lithium-ion batteries.
Solid-state preparation method, pole piece and the lithium ion battery of a kind of electrodes of lithium-ion batteries provided by the present invention compared to
The prior art mainly has the following advantages：
1) powder conductive agent and active material are mixed under solid powder state, is different from traditional liquid mixing, mistake
Do not have to addition solvent and binder in journey, simplifies process route, effectively improve preparation efficiency；
2) electrode powder is bonded into the solidification process that process on a current collector is conducting resinl at room temperature, be different from traditional
High temperature is dried, and process can carry out at room temperature, save the input of the energy and drying equipment.
Description of the drawings
By reading the detailed description of hereafter preferred embodiment, various other advantages and benefit are common for this field
Technical staff will become clear.Attached drawing only for the purpose of illustrating preferred embodiments, and is not considered as to the present invention
Limitation.And throughout the drawings, the same reference numbers will be used to refer to the same parts.In the accompanying drawings：
Fig. 1 is that a kind of solid-state preparation method of electrodes of lithium-ion batteries provided in an embodiment of the present invention specifically uses graphite material
When material and the experimental result comparison diagram of comparative example.
Fig. 2 is that a kind of solid-state preparation method of electrodes of lithium-ion batteries provided in an embodiment of the present invention specifically uses LiMn2O4
When material and the experimental result comparison diagram of comparative example.
Specific implementation mode
The exemplary embodiment of the disclosure is more fully described below with reference to accompanying drawings.Although showing the disclosure in attached drawing
Exemplary embodiment, it being understood, however, that may be realized in various forms the disclosure without should be by embodiments set forth here
It is limited.On the contrary, these embodiments are provided to facilitate a more thoroughly understanding of the present invention, and can be by the scope of the present disclosure
Completely it is communicated to those skilled in the art.
Embodiment one：
1) it takes 94 parts of natural graphite negative electrode materials, 4 parts of superconductive carbon blacks (SP) to be put into ball mill and carries out mixing 30 minutes, mix
Synthesize uniform mixed powder；
2) it uses coating device to carry out commercially available conductive charcoal slurry on the copper foil coated in 10 μ m-thicks, the conductive charcoal slurry of coating is set
20 μm of thickness；
3) mixed powder is uniformly sprayed on using flush coater by conductive charcoal serosa surface, that is, forms pole piece semi-finished product, by the pole
To stand 3 hours i.e. curable to get to finished product pole piece in 25 DEG C of room temperature for piece semi-finished product.
In addition, also the solid-state preparation method of above-mentioned electrodes of lithium-ion batteries is applied in electrodes of lithium-ion batteries and lithium ion
In the manufacture of battery.
CR2032 button cells are assembled into using such as superior pole piece to be tested.
Embodiment two：
1) 120 parts of manganate cathode material for lithium, 1 part of superconductive carbon black (SP) are taken, ball mill is put into and carries out mixing 30 minutes, mix
Synthesize uniform mixed powder；
2) it uses coating device to carry out commercially available conductive charcoal slurry on the aluminium foil coated in 15 μ m-thicks, the conductive charcoal slurry of coating is set
20 μm of thickness；
3) mixed powder is uniformly sprayed on using flush coater by conductive charcoal serosa surface, that is, forms pole piece semi-finished product, by the pole
To stand 3 hours i.e. curable to get to finished product pole piece in 25 DEG C of room temperature for piece semi-finished product.
CR2032 button cells are assembled into using such as superior pole piece to be tested.
Embodiment three：
Embodiment three is also further made that following as improved technical solution on the basis of the above embodiments：On
State in step 3), on mixed powder uniform fold to the collector for be coated with conducting resinl after, carry out rolling operation, may be implemented
More firm connection between powder and collector.
Example IV：
Example IV is also further made that following as improved technical solution on the basis of the above embodiments：On
It states in step 3), after rolling operation, vibrations or modes are blown etc. by air-flow removes unstuck powder.This process does not bond
Powder material up is, it can be achieved that the powder during shaking off recycles, active material lagging edge during traditional rubbing method
Corner material is scrapped, and cannot be recycled, this process is more environmentally friendly, high efficiency, low cost.
Comparative example one：
1) 94 parts of natural graphite negative electrode materials, 4 parts of superconductive carbon blacks (SP), 3 parts of binders and 90 parts of solvents is taken to be put into even
Pulp grinder, which is stirred, is mixed into uniform slurry；
2) it uses transfer type coating machine to carry out on the copper foil coated in 10 μ m-thicks, 250 μm of the slurry thickness of coating is set, it will
The pole piece coated is put into 100 degrees Celsius of baking ovens, is taken out after 3 hours.
CR2032 button cells are assembled into using such as superior pole piece to be tested.
Comparative example two：
1) 120 parts of manganate cathode material for lithium, 1 part of superconductive carbon black (SP), 2 parts of binders and 80 parts of solvents is taken to be put into homogenate
Machine, which is stirred, is mixed into uniform slurry；
2) it uses transfer type coating machine to carry out on the aluminium foil coated in 15 μ m-thicks, 200 μm of the slurry thickness of coating is set, it will
The pole piece coated is put into 100 degrees Celsius of baking ovens, is taken out after 3 hours.
CR2032 button cells are assembled into using such as superior pole piece to be tested.
Test result：
As shown in Figure 1, it can be seen that in the comparison of graphite material, method and conventional method provided by the invention reach
Identical effect.As shown in Fig. 2, in the comparison of lithium manganate material, the effect that method provided by the invention generates is better than tradition
Method.
To sum up, the present invention mainly has the following advantages compared to the prior art：
1) powder conductive agent and active material are mixed under solid powder state, is different from traditional liquid mixing, mistake
Do not have to addition solvent and binder in journey, simplifies process route, effectively improve preparation efficiency；
2) electrode powder is bonded into the solidification process that process on a current collector is conducting resinl at room temperature, be different from traditional
High temperature is dried, and process can carry out at room temperature, save the input of the energy and drying equipment.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art
God and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to include these modifications and variations.
Claims (10)
1. a kind of solid-state preparation method of electrodes of lithium-ion batteries, which is characterized in that include the following steps：
1) powder active material and powder conductive agent solid-state are mixed, forms mixed powder；
2) on a current collector by conductive glue；
3) it will be coated on the collector of conducting resinl in mixed powder uniform fold to step 2) made from step 1), conduction gelling
Gu pole piece is obtained after.
2. a kind of solid-state preparation method of electrodes of lithium-ion batteries according to claim 1, which is characterized in that the step
1) in, powder active material and powder conductive agent form mixed powder after mechanical agitation mixes.
3. a kind of solid-state preparation method of electrodes of lithium-ion batteries according to claim 1 or 2, which is characterized in that described
In step 1), powder active material and powder conductive agent by ball mill it is mixed after form mixed powder.
4. a kind of solid-state preparation method of electrodes of lithium-ion batteries according to claim 1, which is characterized in that the step
2) in, conducting resinl is coated on a current collector by coating device.
5. a kind of solid-state preparation method of electrodes of lithium-ion batteries according to claim 1 or 4, which is characterized in that described
The thickness of conducting resinl is no more than 100 μm.
6. a kind of solid-state preparation method of electrodes of lithium-ion batteries according to claim 1, which is characterized in that the step
3) in, on mixed powder uniform fold to the collector for be coated with conducting resinl after, carry out rolling operation.
7. a kind of solid-state preparation method of electrodes of lithium-ion batteries according to claim 6, which is characterized in that the step
3) in, after rolling operation, unstuck powder is removed.
8. according to a kind of solid-state preparation method of any electrodes of lithium-ion batteries of claim 1-7, which is characterized in that institute
It states in step 3), mixed powder is by air-flow even application to being coated on the collector of conducting resinl.
9. a kind of electrodes of lithium-ion batteries, including collector and electrode material, the electrode material include powder active material and
Powder conductive agent, which is characterized in that pass through a kind of solid-state preparation side of any electrodes of lithium-ion batteries of claim 1-8
Method is made.
10. a kind of lithium ion battery, including battery body, which is characterized in that the battery body includes as claimed in claim 9
A kind of electrodes of lithium-ion batteries.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810377164.4A CN108649185A (en) | 2018-04-25 | 2018-04-25 | A kind of solid-state preparation method, pole piece and the lithium ion battery of electrodes of lithium-ion batteries |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810377164.4A CN108649185A (en) | 2018-04-25 | 2018-04-25 | A kind of solid-state preparation method, pole piece and the lithium ion battery of electrodes of lithium-ion batteries |
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| CN108649185A true CN108649185A (en) | 2018-10-12 |
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| CN201810377164.4A Pending CN108649185A (en) | 2018-04-25 | 2018-04-25 | A kind of solid-state preparation method, pole piece and the lithium ion battery of electrodes of lithium-ion batteries |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109411696A (en) * | 2018-11-19 | 2019-03-01 | 台州钱江新能源研究院有限公司 | A kind of coating method of cell electrode piece |
| WO2024031853A1 (en) * | 2022-08-10 | 2024-02-15 | 江苏时代新能源科技有限公司 | Positive electrode sheet and preparation method therefor, electrode assembly, battery cell, and battery |
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| JP2006302525A (en) * | 2005-04-15 | 2006-11-02 | Kyoto Elex Kk | Conductive paste composition |
| CN102054969A (en) * | 2009-11-04 | 2011-05-11 | 三星Sdi株式会社 | Negative electrode for rechargeable lithium battery and rechargeable lithium battery including same |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109411696A (en) * | 2018-11-19 | 2019-03-01 | 台州钱江新能源研究院有限公司 | A kind of coating method of cell electrode piece |
| WO2024031853A1 (en) * | 2022-08-10 | 2024-02-15 | 江苏时代新能源科技有限公司 | Positive electrode sheet and preparation method therefor, electrode assembly, battery cell, and battery |
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Application publication date: 20181012 |