CN110311105A - A kind of cathode pole piece slurry and preparation method, cathode pole piece, lithium ion battery - Google Patents
A kind of cathode pole piece slurry and preparation method, cathode pole piece, lithium ion battery Download PDFInfo
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- CN110311105A CN110311105A CN201910534515.2A CN201910534515A CN110311105A CN 110311105 A CN110311105 A CN 110311105A CN 201910534515 A CN201910534515 A CN 201910534515A CN 110311105 A CN110311105 A CN 110311105A
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- slurry
- pole piece
- cathode pole
- graphite
- titanium
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- 239000002002 slurry Substances 0.000 title claims abstract description 80
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 29
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 29
- 238000002360 preparation method Methods 0.000 title claims abstract description 23
- 238000007613 slurry method Methods 0.000 title abstract description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 97
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 80
- 239000010439 graphite Substances 0.000 claims abstract description 80
- LLZRNZOLAXHGLL-UHFFFAOYSA-J titanic acid Chemical compound O[Ti](O)(O)O LLZRNZOLAXHGLL-UHFFFAOYSA-J 0.000 claims abstract description 45
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 33
- 239000003792 electrolyte Substances 0.000 claims abstract description 10
- 239000002562 thickening agent Substances 0.000 claims abstract description 8
- 239000011230 binding agent Substances 0.000 claims abstract description 7
- 239000006258 conductive agent Substances 0.000 claims abstract description 7
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 24
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 24
- 239000000243 solution Substances 0.000 claims description 20
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 16
- 239000011889 copper foil Substances 0.000 claims description 16
- 239000000725 suspension Substances 0.000 claims description 16
- 238000000034 method Methods 0.000 claims description 15
- 239000000839 emulsion Substances 0.000 claims description 12
- 239000010949 copper Substances 0.000 claims description 8
- 229910052802 copper Inorganic materials 0.000 claims description 8
- 239000000706 filtrate Substances 0.000 claims description 8
- 238000010438 heat treatment Methods 0.000 claims description 8
- 238000003756 stirring Methods 0.000 claims description 8
- DPXJVFZANSGRMM-UHFFFAOYSA-N acetic acid;2,3,4,5,6-pentahydroxyhexanal;sodium Chemical group [Na].CC(O)=O.OCC(O)C(O)C(O)C(O)C=O DPXJVFZANSGRMM-UHFFFAOYSA-N 0.000 claims description 7
- 239000001768 carboxy methyl cellulose Substances 0.000 claims description 7
- 238000002156 mixing Methods 0.000 claims description 7
- 235000019812 sodium carboxymethyl cellulose Nutrition 0.000 claims description 7
- 229920001027 sodium carboxymethylcellulose Polymers 0.000 claims description 7
- 239000012266 salt solution Substances 0.000 claims description 6
- 150000003608 titanium Chemical class 0.000 claims description 6
- QDZRBIRIPNZRSG-UHFFFAOYSA-N titanium nitrate Chemical compound [O-][N+](=O)O[Ti](O[N+]([O-])=O)(O[N+]([O-])=O)O[N+]([O-])=O QDZRBIRIPNZRSG-UHFFFAOYSA-N 0.000 claims description 6
- 239000006230 acetylene black Substances 0.000 claims description 5
- 238000001035 drying Methods 0.000 claims description 5
- 229920001909 styrene-acrylic polymer Polymers 0.000 claims description 5
- 229910052799 carbon Inorganic materials 0.000 claims description 4
- 229910021393 carbon nanotube Inorganic materials 0.000 claims description 4
- 239000002041 carbon nanotube Substances 0.000 claims description 4
- 229920001577 copolymer Polymers 0.000 claims description 4
- 229910021389 graphene Inorganic materials 0.000 claims description 4
- DCKVFVYPWDKYDN-UHFFFAOYSA-L oxygen(2-);titanium(4+);sulfate Chemical compound [O-2].[Ti+4].[O-]S([O-])(=O)=O DCKVFVYPWDKYDN-UHFFFAOYSA-L 0.000 claims description 4
- 229920002239 polyacrylonitrile Polymers 0.000 claims description 4
- 229910000348 titanium sulfate Inorganic materials 0.000 claims description 4
- XJDNKRIXUMDJCW-UHFFFAOYSA-J titanium tetrachloride Chemical compound Cl[Ti](Cl)(Cl)Cl XJDNKRIXUMDJCW-UHFFFAOYSA-J 0.000 claims description 4
- RCYJPSGNXVLIBO-UHFFFAOYSA-N sulfanylidenetitanium Chemical compound [S].[Ti] RCYJPSGNXVLIBO-UHFFFAOYSA-N 0.000 claims description 3
- GNKTZDSRQHMHLZ-UHFFFAOYSA-N [Si].[Si].[Si].[Ti].[Ti].[Ti].[Ti].[Ti] Chemical compound [Si].[Si].[Si].[Ti].[Ti].[Ti].[Ti].[Ti] GNKTZDSRQHMHLZ-UHFFFAOYSA-N 0.000 claims description 2
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 claims 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims 1
- 239000000463 material Substances 0.000 abstract description 10
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 3
- 229910052744 lithium Inorganic materials 0.000 abstract description 3
- 238000005470 impregnation Methods 0.000 abstract description 2
- 239000002105 nanoparticle Substances 0.000 abstract description 2
- 230000010287 polarization Effects 0.000 abstract description 2
- 239000004065 semiconductor Substances 0.000 abstract description 2
- HFCVPDYCRZVZDF-UHFFFAOYSA-N [Li+].[Co+2].[Ni+2].[O-][Mn]([O-])(=O)=O Chemical compound [Li+].[Co+2].[Ni+2].[O-][Mn]([O-])(=O)=O HFCVPDYCRZVZDF-UHFFFAOYSA-N 0.000 description 6
- KFDQGLPGKXUTMZ-UHFFFAOYSA-N [Mn].[Co].[Ni] Chemical compound [Mn].[Co].[Ni] KFDQGLPGKXUTMZ-UHFFFAOYSA-N 0.000 description 6
- 239000000047 product Substances 0.000 description 4
- 229920002125 Sokalan® Polymers 0.000 description 3
- 239000004584 polyacrylic acid Substances 0.000 description 3
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 2
- 239000011888 foil Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000010936 titanium Substances 0.000 description 2
- 229910052719 titanium Inorganic materials 0.000 description 2
- 238000013019 agitation Methods 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000002001 electrolyte material Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000006210 lotion Substances 0.000 description 1
- 239000007773 negative electrode material Substances 0.000 description 1
- LSDSZZKMMNCFMR-UHFFFAOYSA-N nitric acid titanium Chemical compound [Ti].O[N+]([O-])=O LSDSZZKMMNCFMR-UHFFFAOYSA-N 0.000 description 1
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 description 1
- XEWCZKMHKPGIPQ-UHFFFAOYSA-N silicic acid titanium Chemical compound [Ti].O[Si](O)(O)O XEWCZKMHKPGIPQ-UHFFFAOYSA-N 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 238000004073 vulcanization Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y30/00—Nanotechnology for materials or surface science, e.g. nanocomposites
-
- 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
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
-
- 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
- H01M4/133—Electrodes based on carbonaceous material, e.g. graphite-intercalation compounds or CFx
-
- 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
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/362—Composites
- H01M4/366—Composites as layered products
-
- 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
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/58—Selection of substances as active materials, active masses, active liquids of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy; of polyanionic structures, e.g. phosphates, silicates or borates
- H01M4/583—Carbonaceous material, e.g. graphite-intercalation compounds or CFx
- H01M4/587—Carbonaceous material, e.g. graphite-intercalation compounds or CFx for inserting or intercalating light metals
-
- 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
-
- 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
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Abstract
The present invention relates to field of lithium ion battery, disclosing a kind of cathode pole piece slurry and preparation method, cathode pole piece, lithium ion battery, the slurry includes: slurry 46-54%, water 46-54% by mass fraction；The slurry includes: titanium hydroxide coated graphite 93.5-95.5%, conductive agent 2-3%, thickener 1-1.5%, binder 1.5-2% by mass fraction.The power output amplitude of the lithium ion battery assembled with the cathode pole piece greatly promotes, and can improve electrolyte for the effect of impregnation of graphite, improve embedding lithium dynamics, reduce charge and discharge polarization；In addition, the characteristic of semiconductor of titanium hydroxide itself, accelerates electronics conduction, covering material has nano particle size, and the presence of tunnel-effect improves lithium ion conduction, the low temp power of battery core, which exports, to be optimized, and especially lithium ion battery repid discharge ability under high current is greatly improved.
Description
Technical field
The present invention relates to technical field of lithium ion more particularly to a kind of cathode pole piece slurry and preparation method, bear
Pole pole piece, lithium ion battery and preparation method thereof.
Background technique
With output voltage is high, energy density is big, self discharge is small, memory-less effect, good cycle, operating temperature range
Width and it is environmentally friendly the advantages that lithium ion battery, be widely used to portable electronic product and consumer electronics and produce
In product, and in recent years along with the development of electric car and its technology is able to fast development.
Lithium ion battery is mainly made of anode, cathode, diaphragm and electrolyte material.Wherein, positive and negative pole material is to battery
Performance play vital influence.Currently, power battery is not achieved for energy density in the performance for being limited to material of main part
With the requirement of course continuation mileage, many subdivision fields all propose more urgent want to the high rate performance of battery and rapid charge characteristic
It asks.
The graphite system dynamic performance of current existing negative electrode material is poor, and removal lithium embedded speed is slower, and output power is low,
Battery core product is unable to satisfy for powerful output, reason for that, significant portion is the coat electricity on cathode pole piece
Caused by performance.
Summary of the invention
In view of this, the present invention provides a kind of cathode pole piece slurry and preparation method, cathode pole piece, lithium-ion electrics
Pond, this slurry are coated in negative electrode metallic foil on piece and form cathode pole piece, with the power for the lithium ion battery that the cathode pole piece assembles
Output amplitude greatly promotes.
A kind of cathode pole piece slurry, the slurry include: by mass fraction
Slurry 46-54%
Water 46-54%；
The slurry includes: by mass fraction
Preferably, the titanium hydroxide coated graphite the preparation method comprises the following steps:
Graphite and ethanol solution are added to the water, are heated to 400-500 DEG C, is configured to quality after 1-3h is stirred by ultrasonic
Concentration is the suspension of 20-40%；
Mass concentration is added into suspension and is 10% sodium hydroxide solution, then the titanium salt solution of 5%-10% is added dropwise,
It carries out ultrasonic disperse and controls pH value to be 9-11, under the conditions of 600 DEG C -800 DEG C, heat treatment 3-5h obtains coated graphite；It will be anti-
Coated graphite after answering is cleaned repeatedly with pure water, until filtrate is in neutrality, then obtains titanium hydroxide coated graphite through microwave drying.
Preferably, the D50 of the graphite cathode be 6-15 μm, specific surface area 0.8-1.6m2/g, tap density be greater than
Equal to 0.6g/cm3；The titanium salt solution is one of titanium chloride, titanium sulfate, Titanium Nitrate, titanium silicate and titanium sulfide or more
Kind；The titanium hydroxide covering amount of the titanium hydroxide coated graphite is the 1-5wt% of graphite levels.
Preferably, the conductive agent is carbon black, acetylene black, electrically conductive graphite, carbon nanotube, conductive Carbon fibe and graphene
One of or it is a variety of.
Preferably, the thickener is sodium carboxymethylcellulose.
Preferably, the binder is SBR emulsion, styrene-acrylic emulsion, polyacrylic acid and polyacrylonitrile multi-component copolymer
One of object lotion.
A kind of preparation method of cathode pole piece slurry, method include:
Titanium hydroxide coated graphite, conductive agent, thickener and binder are added into water, mixing speed 2500-
4000r/min stirs 200-280min.
A kind of cathode pole piece, including copper foil and above-mentioned slurry, the slurry is coated on copper foil.
Preferably, the copper thickness is 8-12 μm.
A kind of lithium ion battery, including tertiary cathode piece, diaphragm, electrolyte and above-mentioned cathode pole piece, cathode is excessive
For 1.15-1.2.
The present invention provides a kind of cathode pole piece slurry and preparation method, cathode pole piece, lithium ion battery, this slurry is applied
Overlay on negative electrode metallic foil on piece formed cathode pole piece, with the cathode pole piece assemble lithium ion battery power output amplitude significantly
It is promoted, electrolyte can be improved for the effect of impregnation of graphite, improve embedding lithium dynamics, reduce charge and discharge polarization；In addition,
The characteristic of semiconductor of titanium hydroxide itself, accelerate electronics conduction, covering material have nano particle size, the presence of tunnel-effect,
Lithium ion conduction is improved, the low temp power of battery core, which exports, to be optimized, and especially lithium ion battery is quickly put under high current
Electric energy power is greatly improved.
Specific embodiment
Below in conjunction with the embodiment of the present invention, technical scheme in the embodiment of the invention is clearly and completely described,
Obviously, described embodiments are some of the embodiments of the present invention, instead of all the embodiments.Based on the implementation in the present invention
Example, every other embodiment obtained by those of ordinary skill in the art without making creative efforts belong to
The scope of protection of the invention.
It should be appreciated that ought use in this specification and in the appended claims, term " includes " and "comprising" instruction
Described feature, entirety, step, operation, the presence of element and/or component, but one or more of the other feature, whole is not precluded
Body, step, operation, the presence or addition of element, component and/or its set.
It will be further appreciated that the term "and/or" used in description of the invention and the appended claims is
Refer to any combination and all possible combinations of one or more of associated item listed, and including these combinations.
A kind of cathode pole piece slurry, slurry include: by mass fraction
Slurry 46-54%
Water 46-54%；
The slurry includes: by mass fraction
Wherein, titanium hydroxide coated graphite is heated to the preparation method comprises the following steps: graphite and ethanol solution are added to the water
400-500 DEG C, the suspension that mass concentration is 20-40% is configured to after 1-3h is stirred by ultrasonic；It is dense that quality is added into suspension
Degree is 10% sodium hydroxide solution, then the titanium salt solution of 5%-10% is added dropwise, and carries out ultrasonic disperse and control pH value to be 9-11,
Under the conditions of 600 DEG C -800 DEG C, heat treatment 3-5h obtains coated graphite；Coated graphite after reaction is cleaned repeatedly with pure water,
Until filtrate is in neutrality, then titanium hydroxide coated graphite is obtained through microwave drying.Wherein, the D50 of graphite is 6-15 μm, specific surface
Product is 0.8-1.6m2/ g, tap density are more than or equal to 0.6g/cm3；Titanium salt solution is titanium chloride, titanium sulfate, Titanium Nitrate, silicic acid
One of titanium and titanium sulfide are a variety of；The titanium hydroxide covering amount of titanium hydroxide coated graphite is the 1- of graphite levels
5wt%.
Conductive agent is using carbon black, acetylene black, electrically conductive graphite, carbon nanotube, conductive one of Carbon fibe and graphene
Or it is a variety of；Thickener uses sodium carboxymethylcellulose；Binder using SBR emulsion, styrene-acrylic emulsion, polyacrylic acid and
One of polyacrylonitrile multi-copolymer emulsion.
A kind of preparation method of cathode pole piece slurry, method include:
Titanium hydroxide coated graphite, conductive agent, thickener and binder are added into water, mixing speed 2500-
4000r/min stirs 200-280min, slurry can be obtained.
Above-mentioned slurry is coated on copper foil including copper foil and above-mentioned slurry by a kind of cathode pole piece, through dry
To cathode pole piece；Then also roll-in can be carried out to cathode pole piece, cross cutting obtains assembling cathode pole piece；Generally, selection
Copper thickness is 8-12 μm.
A kind of lithium ion battery, including tertiary cathode piece, diaphragm, electrolyte and above-mentioned cathode pole piece, cathode is excessive
For 1.15-1.2.Wherein, tertiary cathode piece be common nickel-cobalt lithium manganate material (ratio of nickel-cobalt-manganese ternary element can be 1:1:
1,4:2:4,5:2:3,6:2:2 and 8:1:1 etc.), D50 is 4-12 μm.
Specific embodiment 1
A kind of cathode pole piece slurry, slurry include: by mass fraction
Slurry 46%
Water 54%；
The slurry includes: by mass fraction
Wherein, titanium hydroxide coated graphite is heated to the preparation method comprises the following steps: graphite and ethanol solution are added to the water
400 DEG C, the suspension that mass concentration is 40% is configured to after 3h is stirred by ultrasonic；It is 10% that mass concentration is added into suspension
Sodium hydroxide solution, then 10% titanium sulfate solution is added dropwise, it carries out ultrasonic disperse and controls pH value to be 9, under the conditions of 800 DEG C,
Heat treatment 3h obtains coated graphite；Coated graphite after reaction is cleaned repeatedly with pure water, until filtrate is in neutrality, then through microwave
It is dried to obtain titanium hydroxide coated graphite.Wherein, the D50 of graphite is 8 μm, specific surface area 1.6m2/ g, tap density 1g/
cm3；The titanium hydroxide covering amount of titanium hydroxide coated graphite is the 1.3wt% of graphite levels.
A kind of preparation method of cathode pole piece slurry, method include:
Titanium hydroxide coated graphite, acetylene black, sodium carboxymethylcellulose and polyacrylic acid are added into water, stirring speed
Degree is 4000r/min, stirs 200min, slurry can be obtained.
Above-mentioned slurry is coated on copper foil including copper foil and above-mentioned slurry by a kind of cathode pole piece, through dry
To cathode pole piece；Then also roll-in can be carried out to cathode pole piece, cross cutting obtains assembling cathode pole piece；Generally, selection
Copper thickness is 8 μm.
A kind of lithium ion battery, including tertiary cathode piece, diaphragm, electrolyte and above-mentioned cathode pole piece, cathode is excessive
It is 1.15.Wherein, tertiary cathode piece is common nickel-cobalt lithium manganate material (ratio of nickel-cobalt-manganese ternary element is 1:1:1), and D50 is
5μm。
Specific embodiment 2
A kind of cathode pole piece slurry, slurry include: by mass fraction
Slurry 52%
Water 48%；
The slurry includes: by mass fraction
Wherein, titanium hydroxide coated graphite is heated to the preparation method comprises the following steps: graphite and ethanol solution are added to the water
420 DEG C, the suspension that mass concentration is 25% is configured to after 3h is stirred by ultrasonic；It is 10% that mass concentration is added into suspension
Sodium hydroxide solution, then the nitric acid titanium solution of 6%-8% is added dropwise, it carries out ultrasonic disperse and controls pH value to be 9, in 620 DEG C of conditions
Under, heat treatment 4h obtains coated graphite；Coated graphite after reaction is cleaned repeatedly with pure water, until filtrate is in neutrality, then is passed through
Microwave drying obtains titanium hydroxide coated graphite.Wherein, the D50 of graphite is 7 μm, specific surface area 1.4m2/ g, tap density are
0.88g/cm3；The titanium hydroxide covering amount of titanium hydroxide coated graphite is the 1.5wt% of graphite levels.
A kind of preparation method of cathode pole piece slurry, method include:
Titanium hydroxide coated graphite, carbon black, sodium carboxymethylcellulose and styrene-acrylic emulsion are added into water, mixing speed
For 3600r/min, 220min is stirred, slurry can be obtained.
Above-mentioned slurry is coated on copper foil including copper foil and above-mentioned slurry by a kind of cathode pole piece, through dry
To cathode pole piece；Then also roll-in can be carried out to cathode pole piece, cross cutting obtains assembling cathode pole piece；Generally, selection
Copper thickness is 10 μm.
A kind of lithium ion battery, including tertiary cathode piece, diaphragm, electrolyte and above-mentioned cathode pole piece, cathode is excessive
It is 1.2.Wherein, tertiary cathode piece is common nickel-cobalt lithium manganate material (ratio of nickel-cobalt-manganese ternary element is 5:2:3), D50 6
μm。
Specific embodiment 3
A kind of cathode pole piece slurry, slurry include: by mass fraction
Slurry 54%
Water 46%；
The slurry includes: by mass fraction
Wherein, titanium hydroxide coated graphite the preparation method comprises the following steps:
Graphite and ethanol solution are added to the water, are heated to 500 DEG C, being configured to mass concentration after ultrasonic agitation 1h is
20% suspension；Into suspension be added mass concentration be 10% sodium hydroxide solution, then be added dropwise 5% titanium chloride it is molten
Liquid carries out ultrasonic disperse and controls pH value to be 11, and under the conditions of 600 DEG C, heat treatment 5h obtains coated graphite；By the packet after reaction
It covers graphite and is cleaned repeatedly with pure water, until filtrate is in neutrality, then obtain titanium hydroxide coated graphite through microwave drying.Wherein, stone
The D50 of ink is 7 μm, specific surface area 1.4m2/ g, tap density 0.88g/cm3；The titanium hydroxide of titanium hydroxide coated graphite
Covering amount is the 2wt% of graphite levels.
A kind of preparation method of cathode pole piece slurry, method include:
Titanium hydroxide coated graphite, acetylene black, sodium carboxymethylcellulose and polyacrylonitrile multi-copolymer emulsion are added
Enter into water, mixing speed 2500r/min, stirs 280min, slurry can be obtained.
Above-mentioned slurry is coated on copper foil including copper foil and above-mentioned slurry by a kind of cathode pole piece, through dry
To cathode pole piece；Then also roll-in can be carried out to cathode pole piece, cross cutting obtains assembling cathode pole piece；Generally, selection
Copper thickness is 8 μm.
A kind of lithium ion battery, including tertiary cathode piece, diaphragm, electrolyte and above-mentioned cathode pole piece, cathode is excessive
It is 1.18.Wherein, tertiary cathode piece is common nickel-cobalt lithium manganate material (ratio of nickel-cobalt-manganese ternary element is 4:2:4), and D50 is
8μm。
Specific embodiment 4
A kind of cathode pole piece slurry, slurry include: by mass fraction
Slurry 48%
Water 52%；
The slurry includes: by mass fraction
Wherein, titanium hydroxide coated graphite is heated to the preparation method comprises the following steps: graphite and ethanol solution are added to the water
480 DEG C, the suspension that mass concentration is 35% is configured to after 1h is stirred by ultrasonic；It is 10% that mass concentration is added into suspension
Sodium hydroxide solution, then 8% silicic acid titanium solution is added dropwise, it carries out ultrasonic disperse and controls pH value to be 10, under the conditions of 750 DEG C,
Heat treatment 3h obtains coated graphite；Coated graphite after reaction is cleaned repeatedly with pure water, until filtrate is in neutrality, then through microwave
It is dried to obtain titanium hydroxide coated graphite.Wherein, the D50 of graphite is 13 μm, specific surface area 1m2/ g, tap density 0.9g/
cm3；The titanium hydroxide covering amount of titanium hydroxide coated graphite is the 4wt% of graphite levels.
A kind of preparation method of cathode pole piece slurry, method include:
By titanium hydroxide coated graphite, carbon nanotube, conductive Carbon fibe, sodium carboxymethylcellulose and SBR emulsion
It is added into water, mixing speed 2800r/min, stirs 260min, slurry can be obtained.
Above-mentioned slurry is coated on copper foil including copper foil and above-mentioned slurry by a kind of cathode pole piece, through dry
To cathode pole piece；Then also roll-in can be carried out to cathode pole piece, cross cutting obtains assembling cathode pole piece；Generally, selection
Copper thickness is 11 μm.
A kind of lithium ion battery, including tertiary cathode piece, diaphragm, electrolyte and above-mentioned cathode pole piece, cathode is excessive
It is 1.16.Wherein, tertiary cathode piece is common nickel-cobalt lithium manganate material (ratio of nickel-cobalt-manganese ternary element is 6:2:2), and D50 is
12μm。
Specific embodiment 5
A kind of cathode pole piece slurry, slurry include: by mass fraction
Slurry 49%
Water 51%；
The slurry includes: by mass fraction
Wherein, titanium hydroxide coated graphite is heated to the preparation method comprises the following steps: graphite and ethanol solution are added to the water
450 DEG C, the suspension that mass concentration is 30% is configured to after 2h is stirred by ultrasonic；It is 10% that mass concentration is added into suspension
Sodium hydroxide solution, then 7% vulcanization titanium solution is added dropwise, it carries out ultrasonic disperse and controls pH value to be 10, under the conditions of 680 DEG C,
Heat treatment 4h obtains coated graphite；Coated graphite after reaction is cleaned repeatedly with pure water, until filtrate is in neutrality, then through microwave
It is dried to obtain titanium hydroxide coated graphite.Wherein, the D50 of graphite is 15 μm, specific surface area 1.6m2/ g, tap density are
0.9g/cm3；The titanium hydroxide covering amount of titanium hydroxide coated graphite is the 5wt% of graphite levels.
A kind of preparation method of cathode pole piece slurry, method include:
Titanium hydroxide coated graphite, graphene, thickener and styrene-acrylic emulsion are added into water, mixing speed is
3200r/min stirs 240min, slurry can be obtained.
Above-mentioned slurry is coated on copper foil including copper foil and above-mentioned slurry by a kind of cathode pole piece, through dry
To cathode pole piece；Then also roll-in can be carried out to cathode pole piece, cross cutting obtains assembling cathode pole piece；Generally, selection
Copper thickness is 12 μm.
A kind of lithium ion battery, including tertiary cathode piece, diaphragm, electrolyte and above-mentioned cathode pole piece, cathode is excessive
It is 1.17.Wherein, tertiary cathode piece is common nickel-cobalt lithium manganate material (ratio of nickel-cobalt-manganese ternary element is 8:1:1), and D50 is
12μm。
By slurry made from embodiment 1-5, and cathode pole piece is made according to the above method, and thus cathode pole piece obtains
Lithium ion battery；The slurry formed with existing graphite of the use without titanium hydroxide, and cathode is made by above-mentioned same method
Pole piece, and the lithium ion battery that thus cathode pole piece obtains carry out performance comparison, as comparative example 1.It carries out under different temperatures
Power output measurement, measurement result and calculated result is as follows:
As seen from the above table, graphite lithium ion battery of the lithium ion battery of embodiment 1-5 compared to uncoated titanium hydroxide
There are biggish advantages in terms of output power, and especially at low temperature, advantage is more obvious.At 25 DEG C, output power is mentioned
Increasing degree degree reaches 15% or more, and averagely promotion amplitude reaches 15.01%；At 0 DEG C, output power promotes amplitude and can reach
20%, averagely promotion amplitude reaches 19.89%；At -10 DEG C, output power promotes amplitude and reaches 25% or more, average to be promoted
Amplitude reaches 26.75%；At -20 DEG C, output power promotes amplitude and reaches 30% or more, and averagely promotion amplitude reaches
31.42%；At -30 DEG C, output power promotes amplitude and reaches 35% or more, and averagely promotion amplitude reaches 36.5%.
The steps in the embodiment of the present invention can be sequentially adjusted, merged and deleted according to actual needs.
It is described in detail herein, applies specific case and the principle of the present invention and embodiment are explained
It states, above embodiments are merely used to help understand method and its core concept of the invention；Meanwhile for the general skill of this field
Art personnel, according to the thought of the present invention, there will be changes in the specific implementation manner and application range, in conclusion this
Description should not be construed as limiting the invention.
It is apparent to those skilled in the art that for convenience and simplicity of description, the system of foregoing description
It with the specific work process of unit, can refer to corresponding processes in the foregoing method embodiment, details are not described herein.
Claims (10)
1. a kind of cathode pole piece slurry, which is characterized in that the slurry includes: by mass fraction
Slurry 46-54%
Water 46-54%；
The slurry includes: by mass fraction
2. slurry according to claim 1, it is characterised in that: the titanium hydroxide coated graphite the preparation method comprises the following steps:
Graphite and ethanol solution are added to the water, are heated to 400-500 DEG C, is configured to mass concentration after 1-3h is stirred by ultrasonic
For the suspension of 20-40%；
Mass concentration is added into suspension and is 10% sodium hydroxide solution, then the titanium salt solution of 5%-10% is added dropwise, carries out
Ultrasonic disperse simultaneously controls pH value as 9-11, and under the conditions of 600 DEG C -800 DEG C, heat treatment 3-5h obtains coated graphite；After reacting
Coated graphite cleaned repeatedly with pure water, until filtrate is in neutrality, then obtain titanium hydroxide coated graphite through microwave drying.
3. slurry according to claim 2, it is characterised in that: the D50 of the graphite is 6-15 μm, specific surface area 0.8-
1.6m2/ g, tap density are more than or equal to 0.6g/cm3；The titanium salt solution be titanium chloride, titanium sulfate, Titanium Nitrate, titanium silicate with
And one of titanium sulfide or a variety of；The titanium hydroxide covering amount of the titanium hydroxide coated graphite is the 1- of graphite levels
5wt%.
4. slurry according to claim 1, it is characterised in that: the conductive agent is carbon black, acetylene black, electrically conductive graphite, carbon
Nanotube, conductive one of Carbon fibe and graphene or a variety of.
5. slurry according to claim 1, it is characterised in that: the thickener is sodium carboxymethylcellulose.
6. slurry according to claim 1, it is characterised in that: the binder is SBR emulsion, styrene-acrylic emulsion, gathers
One of acrylic acid and polyacrylonitrile multi-copolymer emulsion.
7. a kind of preparation method of cathode pole piece slurry, which is characterized in that method includes:
Titanium hydroxide coated graphite, conductive agent, thickener and binder are added into water, mixing speed 2500-
4000r/min stirs 200-280min.
8. a kind of cathode pole piece, it is characterised in that: including copper foil and slurry as claimed in claim 1 to 7, the slurry
Coated on copper foil.
9. cathode pole piece according to claim 8, it is characterised in that: the copper thickness is 8-12 μm.
10. a kind of lithium ion battery, which is characterized in that including tertiary cathode piece, diaphragm, electrolyte and any institute of right 8-9
The cathode pole piece stated, cathode are excessively 1.15-1.2.
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