CN110364685A - A kind of preparation method of the electrodes of lithium-ion batteries of the coating containing organic matter - Google Patents
A kind of preparation method of the electrodes of lithium-ion batteries of the coating containing organic matter Download PDFInfo
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- CN110364685A CN110364685A CN201910483774.7A CN201910483774A CN110364685A CN 110364685 A CN110364685 A CN 110364685A CN 201910483774 A CN201910483774 A CN 201910483774A CN 110364685 A CN110364685 A CN 110364685A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
- G01B11/06—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness for measuring thickness ; e.g. of sheet material
- G01B11/0616—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness for measuring thickness ; e.g. of sheet material of coating
- G01B11/0683—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness for measuring thickness ; e.g. of sheet material of coating measurement during deposition or removal of the layer
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N9/00—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity
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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
- 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
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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
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/654—Means for temperature control structurally associated with the cells located inside the innermost case of the cells, e.g. mandrels, electrodes or electrolytes
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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
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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
- H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
- H01M4/624—Electric conductive fillers
- H01M4/625—Carbon or graphite
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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
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/403—Manufacturing processes of separators, membranes or diaphragms
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/409—Separators, membranes or diaphragms characterised by the material
- H01M50/411—Organic material
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/46—Separators, membranes or diaphragms characterised by their combination with 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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- Electrochemistry (AREA)
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Abstract
The invention discloses a kind of preparation methods of the electrodes of lithium-ion batteries of coating containing organic matter, it is characterized by: step includes: by the positive electrode active materials of lithium ion battery or negative electrode active material and conductive agent, binder mixing, anode sizing agent or negative electrode slurry are obtained after stirring, slurry after stirring is mixed with colloidal sol, slurry is coated on before collector after mixing, first precoating coating paste containing organic matter, drying is all carried out after coating, and battery pole piece is made, the organic matter coating is made of following component: polyurethanes, polyethers glycerine, polyvinylidene fluoride homopolymer, sodium bicarbonate, dimethylformamide, catalyst, surfactant.With phthalic acid ester esterification can occur for polyethers glycerine of the present invention, generate alkyd resin, and alkyd resin has good insulating properties.
Description
Technical field
The present invention relates to technical field of lithium ion more particularly to a kind of electrodes of lithium-ion batteries of coating containing organic matter
Preparation method.
Background technique
Lithium ion battery structure a few days ago mainly includes positive plate, negative electrode tab, diaphragm and electrolyte.Arbitrary neighborhood just
It is spaced apart between pole piece and negative electrode tab by diaphragm.Important component of the diaphragm as current lithium ion battery, is lithium
A kind of high added value material higher from technical barrier in Chu battery material, the main function of diaphragm are battery plus-negative plate
It separates, Electolyte-absorptive, can only cannot pass through electronics by lithium ion.
As battery capacity increases, routine techniques is difficult to ensure desired adhesiveness between electrode and diaphragm, and occupies
Space, and it is unable to ensure the viscous stickiness of electrode, non-refractory is easily-deformable.
Summary of the invention
The present invention proposes a kind of lithium ion cell electrode of coating containing organic matter to solve the above-mentioned deficiency of the prior art
The preparation method of piece.
In order to solve the above-mentioned technical problem, the invention adopts the following technical scheme: a kind of lithium ion of coating containing organic matter
The preparation method of battery pole piece, it is characterised in that: step includes: by the positive electrode active materials or negative electrode active of lithium ion battery
Material is mixed with conductive agent, binder, and anode sizing agent or negative electrode slurry are obtained after stirring, the slurry after stirring is mixed with colloidal sol
It closes, slurry is coated on before collector after mixing, first precoating coating paste containing organic matter, is all dried after coating
It is drying at battery pole piece；
The organic matter coating is made of following component: polyurethanes, polyethers glycerine, polyvinylidene fluoride polyamino alkenyl
Object, sodium bicarbonate, dimethylformamide, catalyst, surfactant.
Further, the component in the ceramic PTC coating is in terms of mass fraction: 40-65 parts of polyurethanes, polyethers third
10-15 parts of triol, 10-15 parts of polyvinylidene fluoride homopolymer, 6-13 parts of phthalic acid ester, 3-5.5 parts of dimethylformamide, catalysis
5-9 parts of agent, 3-6 parts of surfactant.
Further, at 50-67 DEG C, by polyurethanes, polyethers glycerine, polyvinylidene fluoride homopolymer, bicarbonate
Sodium, dimethylformamide, catalyst, surfactant after evenly mixing, obtain organic liquid mixture after standing 0.5h.
Further, non-solvent is added in organic liquid mixture, obtains organic ink after 0.5-1h.
Further, curing agent and binder being added in the slurry to be stirred, is made coating, mixing speed is 3000 turns/
min。
Further, non-solvent is ethyl alcohol.
Further, organic coating with a thickness of 2-6mm.
Further, conductive agent is conductive carbon black, and conductive black is Super-P, KS-6, acetylene black, Ketjen black, carbon nanometer
The mixture of one or more of pipe, graphene.
Further, slurry is coated on collection liquid surface process by transfer type coating machine or Spray coater in 20-300
It is carried out in DEG C temperature range.
Further, thickness is tested by infrared-ray on coating machine, real-time monitoring area quality density, area quality is close
Degree is 1mg/cm2More than.
Compared with prior art, beneficial effects of the present invention:
1. replacing diaphragm with organic coating, inside battery space utilization rate is improved.
2. polyethers glycerine can be reacted with phthalic acid ester generates alkyd resin, alkyd resin has good insulating properties,
Effectively diaphragm can be replaced to completely cut off positive and negative anodes.
3. polyvinylidene fluoride homopolymer has high-strength chemical corrosion resistance, high temperature resistant and color-changing, piezoelectricity and resistance to oxidation
Property, it can effectively control the temperature of battery.
4. polyurethanes is a kind of emerging high-molecular organic material, there is superior heat resistance and higher dimensionally stable
Property, while ensuring to electrode good adhesion.
5. monitoring surface density using infrared-ray, avoid that large batch of pole piece is caused to be scrapped because coating amount is unqualified.
6. the cohesive force and compacted density of lithium ion battery plus-negative plate pole piece can be improved in conductive black, be conducive to cell body
The promotion of product energy density
Specific embodiment
Invention is described in detail below with reference to embodiment.
Embodiment 1
A kind of preparation method of the electrodes of lithium-ion batteries of coating containing organic matter proposed by the present invention, battery pole
The preparation step of piece includes 1. colloidal sols, 2. production slurries, 3. coatings, 4. drying；The anode of lithium ion battery is living
Property material or negative electrode active material and conductive agent, conductive agent is conductive black, (ingredient is synthetic resin to binder on the market
) ratio 4:1:1 by weight mixing, by stirring after anode sizing agent or negative electrode slurry, by after stirring slurry with it is molten
Glue is mixed according to weight ratio 2:1, and mixed slurry is coated on organic coating layer surface, and the raw material of organic coating is by poly- amino
40 parts of formic acid esters, 10 parts of polyvinylidene fluoride homopolymer, 3 parts of dimethylformamide, 5 parts of catalyst, 3 parts of surfactant compositions,
At 50 DEG C after evenly mixing by Organic Ingredients, organic liquid mixture is obtained after standing 0.5h, then adds ethyl alcohol to organic liquid mixture
It is stirred to react, organic ink is obtained after 0.5h, it is 6mm that this, which paints width, then curing agent is added (on the market often into organic ink
Curing agent) and bonding agent (on the market main component be silica gel) be stirred, be finally made organic coating,
The speed being stirred is 3000 turns/min, and organic ink first uses the mode of paint roller, coated on being formed on collection liquid surface
Slurry is being coated on organic coating layer surface after organic coating, all drying is being carried out after coating and battery pole piece, poly- amino is made
Formic acid esters is a kind of emerging high-molecular organic material, has the characteristics that low VOC content, low or non-environmental-pollution, non-ignitable.
Embodiment 2
It advanced optimizes on the basis of embodiment 1, the raw material of organic coating is by 40 parts of polyurethanes, polyethers the third three
10 parts of alcohol, 10 parts of polyvinylidene fluoride homopolymer, 6 parts of phthalic acid ester, 3 parts of dimethylformamide, 5 parts of catalyst, surface-active
3 parts of agent compositions at 50 DEG C after evenly mixing by Organic Ingredients obtain organic liquid mixture after standing 0.5h, then to organic mixing
Liquid addition ethyl alcohol is stirred to react, and organic ink is obtained after 0.5h, it is 6mm that this, which paints width, since polyethers glycerine can be with benzene two
The alkyd resin that formic acid esters generates does not dissolve in ethyl alcohol, can will acetify residual impurity in reaction and be come out by separation of ethanol, then to having
(main component is on the market for silica gel for addition curing agent (common curing agent on the market) and bonding agent in machine slurry
Can) be stirred, it is finally made organic coating, the speed being stirred is 3000 turns/min, and slurry is coated on organic coating
Behind surface, in the mode with paint roller, it is coated on collection liquid surface.
With phthalic acid ester esterification can occur for polyethers glycerine, generate alkyd resin, and alkyd resin has good
Insulating properties；
Polyvinylidene fluoride homopolymer has high-strength chemical corrosion resistance, high temperature resistant and color-changing, piezoelectricity and oxidative resistance,
The temperature of battery can effectively be controlled.
Embodiment 3
It is advanced optimized on the basis of embodiment 2, the raw material of organic coating is by 65 parts of polyurethanes, polyethers the third three
15 parts of alcohol, 15 parts of polyvinylidene fluoride homopolymer, 13 parts of phthalic acid ester, 5.5 parts of dimethylformamide, 9 parts of catalyst, surface is living
Property 6 parts of agent compositions, at 50 DEG C after evenly mixing by Organic Ingredients, after standing 0.5h obtain organic liquid mixture, then to organic mixed
It closes liquid addition ethyl alcohol to be stirred to react, organic ink is obtained after 0.5h, it is 6mm that this, which paints width, since polyethers glycerine can be with benzene
The alkyd resin that dicarboxylic acid esters generate does not dissolve in ethyl alcohol, can will acetify residual impurity in reaction and be come out by separation of ethanol, then to
(main component is on the market for silica gel for addition curing agent (common curing agent on the market) and bonding agent in organic ink
Can) be stirred, it is finally made organic coating, the speed being stirred is 3000 turns/min, and slurry is coated on organic coating
Behind surface, in the mode with paint roller, it is coated on collection liquid surface.
Embodiment 4
Conductive black in embodiment 1, be Super-P, KS-6, acetylene black, Ketjen black, carbon nanotube, in graphene
One or more kinds of mixtures, can be improved the cohesive force and compacted density of lithium ion battery plus-negative plate pole piece, is conducive to
The promotion of battery volume energy density.
Embodiment 5
It advanced optimizes on the basis of embodiment 3, can be turned by what is heated by slurry coating and collection liquid surface process
Shifting formula coating machine, Spray coater and other can be used for lithium ion battery production coating machine in 20-300 DEG C of temperature range
High temperature coating is carried out, and in coating process, thickness is tested by the infrared-ray on coating machine, passes through the real-time monitoring that converts
Surface density, area quality density are 1mg/cm2 or more, monitor surface density using infrared-ray, avoid causing large batch of pole piece
It is scrapped because coating amount is unqualified.
The comparison of the battery performance of embodiment 1 and embodiment 2 and embodiment 3
Only several embodiments of the present invention are expressed for above-described embodiment, and the description thereof is more specific and detailed, but can not
Therefore understands that being limitations on the scope of the patent of the present invention.It should be pointed out that for those of ordinary skill in the art,
Under the premise of not departing from present inventive concept, various modifications and improvements can be made, and these are all within the scope of protection of the present invention.
Therefore, the invention patent and protection scope should be subject to the appended claims.
Claims (10)
1. a kind of preparation method of the electrodes of lithium-ion batteries of coating containing organic matter, it is characterised in that: step includes: by lithium ion
The positive electrode active materials or negative electrode active material of battery are mixed with conductive agent, binder, by stirring after anode sizing agent or
Negative electrode slurry mixes the slurry after stirring with colloidal sol, and slurry is coated on before collector after mixing, and first precoating is containing organic
Object coating paste all carries out drying after coating and battery pole piece is made；
The organic matter coating is made of following component: polyurethanes, polyethers glycerine, polyvinylidene fluoride homopolymer, carbon
Sour hydrogen sodium, dimethylformamide, catalyst, surfactant.
2. a kind of preparation method of the electrodes of lithium-ion batteries of the coating containing organic matter as described in claim 1, it is characterised in that:
Component in the ceramic PTC coating is in terms of mass fraction: 40-65 parts of polyurethanes, 10-15 parts of polyethers glycerine, gathering inclined
10-15 parts of fluoride homopolymer, 6-13 parts of phthalic acid ester, 3-5.5 parts of dimethylformamide, 5-9 parts of catalyst, surface-active
3-6 parts of agent.
3. a kind of preparation method of the electrodes of lithium-ion batteries of the coating containing organic matter as described in claim 1, it is characterised in that:
At 50-67 DEG C, by polyurethanes, polyethers glycerine, polyvinylidene fluoride homopolymer, phthalic acid ester, N- dimethyl methyl
Amide, catalyst, surfactant after evenly mixing, obtain organic liquid mixture after standing 0.5h.
4. a kind of preparation method of the electrodes of lithium-ion batteries of the coating containing organic matter as claimed in claim 3, it is characterised in that:
Non-solvent is added in the organic liquid mixture, organic matter coating paste is obtained after 0.5-1h.
5. a kind of preparation method of the electrodes of lithium-ion batteries of the coating containing organic matter as described in claim 1, it is characterised in that:
Curing agent is added in the slurry and binder is stirred, coating is made, mixing speed is 3000 turns/min.
6. a kind of preparation method of the electrodes of lithium-ion batteries of the coating containing organic matter as claimed in claim 4, it is characterised in that:
The non-solvent is ethyl alcohol.
7. a kind of preparation method of the electrodes of lithium-ion batteries of the coating containing organic matter as described in claim 1, it is characterised in that:
The organic coating with a thickness of 2-6mm.
8. a kind of preparation method of the electrodes of lithium-ion batteries of the coating containing organic matter as described in claim 1, it is characterised in that:
The conductive agent is conductive carbon black, and the conductive black is Super-P, KS-6, acetylene black, Ketjen black, carbon nanotube, graphene
One or more of mixture.
9. a kind of preparation method of the electrodes of lithium-ion batteries of the coating containing organic matter as described in claim 1, it is characterised in that:
Slurry is coated on collection liquid surface process and is carried out in 20-300 DEG C of temperature range by transfer type coating machine or Spray coater.
10. a kind of preparation method of the electrodes of lithium-ion batteries of the coating containing organic matter as described in claim 1, feature exist
In: thickness, real-time monitoring area quality density are tested by the infrared-ray on coating machine, area quality density is 1mg/cm2
More than.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114914392A (en) * | 2022-05-11 | 2022-08-16 | 芜湖天弋能源科技有限公司 | Preparation method of porous pole piece of sodium-ion battery |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114914392A (en) * | 2022-05-11 | 2022-08-16 | 芜湖天弋能源科技有限公司 | Preparation method of porous pole piece of sodium-ion battery |
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