CN119008836A - Solid active material battery electrode material and preparation method thereof - Google Patents
Solid active material battery electrode material and preparation method thereof Download PDFInfo
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- CN119008836A CN119008836A CN202411448592.3A CN202411448592A CN119008836A CN 119008836 A CN119008836 A CN 119008836A CN 202411448592 A CN202411448592 A CN 202411448592A CN 119008836 A CN119008836 A CN 119008836A
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- 239000007787 solid Substances 0.000 title claims abstract description 32
- 239000007772 electrode material Substances 0.000 title claims abstract description 31
- 238000002360 preparation method Methods 0.000 title abstract description 16
- 239000011149 active material Substances 0.000 title description 22
- 239000013543 active substance Substances 0.000 claims abstract description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 12
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 11
- 239000006229 carbon black Substances 0.000 claims abstract description 11
- 239000010439 graphite Substances 0.000 claims abstract description 11
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 11
- 238000000034 method Methods 0.000 claims abstract description 10
- 239000011230 binding agent Substances 0.000 claims abstract description 9
- 239000003292 glue Substances 0.000 claims abstract description 5
- 238000004898 kneading Methods 0.000 claims description 39
- 238000001125 extrusion Methods 0.000 claims description 12
- 238000007654 immersion Methods 0.000 claims description 10
- 238000005245 sintering Methods 0.000 claims description 8
- 239000002033 PVDF binder Substances 0.000 claims description 7
- 229920002981 polyvinylidene fluoride Polymers 0.000 claims description 7
- 238000000227 grinding Methods 0.000 claims description 6
- 229920002134 Carboxymethyl cellulose Polymers 0.000 claims description 5
- 229920002125 Sokalan® Polymers 0.000 claims description 4
- 238000002156 mixing Methods 0.000 claims description 4
- 239000001768 carboxy methyl cellulose Substances 0.000 claims description 3
- 235000010948 carboxy methyl cellulose Nutrition 0.000 claims description 3
- 239000008112 carboxymethyl-cellulose Substances 0.000 claims description 3
- 239000004584 polyacrylic acid Substances 0.000 claims description 3
- 239000000230 xanthan gum Substances 0.000 claims description 3
- 229920001285 xanthan gum Polymers 0.000 claims description 3
- 229940082509 xanthan gum Drugs 0.000 claims description 3
- 235000010493 xanthan gum Nutrition 0.000 claims description 3
- 239000000454 talc Substances 0.000 claims description 2
- 229910052623 talc Inorganic materials 0.000 claims description 2
- 238000005470 impregnation Methods 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 11
- FPAFDBFIGPHWGO-UHFFFAOYSA-N dioxosilane;oxomagnesium;hydrate Chemical compound O.[Mg]=O.[Mg]=O.[Mg]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O FPAFDBFIGPHWGO-UHFFFAOYSA-N 0.000 abstract description 9
- 230000007547 defect Effects 0.000 abstract description 6
- 238000005265 energy consumption Methods 0.000 abstract description 6
- 239000002904 solvent Substances 0.000 abstract description 3
- 239000002699 waste material Substances 0.000 abstract description 2
- 239000000203 mixture Substances 0.000 description 21
- 239000011248 coating agent Substances 0.000 description 12
- 238000000576 coating method Methods 0.000 description 12
- 238000010586 diagram Methods 0.000 description 3
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 description 3
- 239000002002 slurry Substances 0.000 description 3
- 239000000084 colloidal system Substances 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 239000011888 foil Substances 0.000 description 2
- 235000015110 jellies Nutrition 0.000 description 2
- 239000008274 jelly Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000002791 soaking Methods 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000499 gel Substances 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 229920002545 silicone oil Polymers 0.000 description 1
- 238000007581 slurry coating method Methods 0.000 description 1
- 235000012222 talc Nutrition 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/28—Processes for applying liquids or other fluent materials performed by transfer from the surfaces of elements carrying the liquid or other fluent material, e.g. brushes, pads, rollers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/02—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by baking
- B05D3/0254—After-treatment
- B05D3/0272—After-treatment with ovens
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/24—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials for applying particular liquids or other fluent materials
-
- 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
-
- 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
- H01M4/0471—Processes of manufacture in general involving thermal treatment, e.g. firing, sintering, backing particulate active material, thermal decomposition, pyrolysis
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- 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
- H01M4/621—Binders
- H01M4/622—Binders being polymers
-
- 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
- H01M4/621—Binders
- H01M4/622—Binders being polymers
- H01M4/623—Binders being polymers fluorinated polymers
-
- 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
-
- 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)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Inorganic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Battery Electrode And Active Subsutance (AREA)
Abstract
本发明属于电池电极技术领域，具体公开了一种固体活性物质电池电极材料及其制备方法。本发明将电极组分混合后顺次进行捏合、研磨、二次捏合、挤芯、烧结、浸油、脱油得到固体活性物质电池电极材料；所述电极组分包括石墨10~80份、炭黑20~80份、滑石粉5~20份、粘结剂1~10份、水120份。本发明公开的固体活性物质电池电极材料相比于传统电池活性物质电极，减少了胶和溶剂的用量，有效减少了能源浪费，使得电池制造成本降低，减少生产过程中的产品缺陷问题；另外，本发明公开的电池电极可以更好的用于电池生产，提升电池生产效率，降低生产能耗和改善过程中产品缺陷问题。
The present invention belongs to the technical field of battery electrodes, and specifically discloses a solid active substance battery electrode material and a preparation method thereof. The present invention mixes the electrode components and sequentially kneads, grinds, re-kneads, extrudes cores, sinters, impregnates with oil, and deoils to obtain a solid active substance battery electrode material; the electrode components include 10 to 80 parts of graphite, 20 to 80 parts of carbon black, 5 to 20 parts of talcum powder, 1 to 10 parts of a binder, and 120 parts of water. Compared with traditional battery active substance electrodes, the solid active substance battery electrode material disclosed in the present invention reduces the amount of glue and solvent, effectively reduces energy waste, reduces battery manufacturing costs, and reduces product defects in the production process; in addition, the battery electrode disclosed in the present invention can be better used in battery production, improve battery production efficiency, reduce production energy consumption, and improve product defects in the process.
Description
Technical Field
The invention relates to the technical field of battery electrodes, in particular to a solid active material battery electrode material and a preparation method thereof.
Background
The current battery electrode is mainly a gelatinous active material, which is mainly prepared by mixing the active material, a solvent and a colloid, then making into a jelly, and transferring the jelly to a current collector for drying. Current gel-like actives have the following disadvantages during use: ① The problems of foil leakage, folds, scratches, dark marks and the like are easy to occur after the coating is caused by the influence of the fluidity and contractility of the slurry; ② The liquid slurry is easy to splash in the production process, so that dry materials are attached to the current collector to cause defects; ③ The drying process needs to lengthen the oven and high temperature, and has larger energy consumption and large equipment volume; ④ The colloid is easy to precipitate, and the surface density of the coating is uneven.
In addition, as for solid electrode materials, the research and development state is still under the present, and the main problems are that there is no way to ensure the thickness stability, uniformity and the like of the coating during use.
Therefore, how to provide a solid active material battery electrode material and a preparation method thereof, and avoiding the occurrence of the above problems is a problem to be solved in the art.
Disclosure of Invention
In view of the above, the invention provides a solid active material battery electrode material and a preparation method thereof, which are used for solving the problems of uneven slurry coating, uneven coating surface density, easy occurrence of defects, high energy consumption, high equipment requirement and the like of the existing battery electrode containing the gel active material.
In order to achieve the above purpose, the invention adopts the following technical scheme:
A preparation method of a solid active material battery electrode material comprises the following steps:
mixing the electrode components, and then sequentially carrying out kneading, grinding, secondary kneading, core extrusion, sintering, oil immersion and deoiling to obtain a solid active material battery electrode material;
the electrode component comprises 10-80 parts of graphite, 20-80 parts of carbon black, 5-20 parts of talcum powder, 1-10 parts of binder and 120 parts of water.
Preferably, the binder comprises one or more of polyvinylidene fluoride, polyacrylic acid, carboxymethyl cellulose, UV glue and xanthan gum.
Preferably, the kneading time is 1-4 hours, the kneading temperature is 0-85 ℃, the revolution speed of kneading is 20-300 rpm, and the rotation speed of kneading is 50-3000 rpm.
Preferably, the grinding time is 0.5-3 hours.
Preferably, the time of the secondary kneading is 0.5-2 hours, the temperature of the secondary kneading is 0-85 ℃, the revolution speed of the secondary kneading is 20-300 rpm, and the rotation speed of the secondary kneading is 50-3000 rpm.
Preferably, the extrusion core is formed by extruding the electrode component, and the pressure of the extrusion forming is 10-1000 kgf;
The sintering temperature is 60-150 ℃ and the sintering time is 0.5-2 h;
The temperature of the oil immersion is 50-100 ℃ and the time is 5-60 min;
the deoiling time is 2-30 min.
The invention also aims to provide the solid active material battery electrode material prepared by the preparation method.
Compared with the prior art, the invention has the following beneficial effects:
1. According to the invention, the consumption of glue and solvent is reduced on the basis of the preparation of the traditional battery active material electrode, so that the energy consumption waste is effectively reduced, the manufacturing cost of the battery is reduced, and the problem of product defects in the production process is reduced;
2. The invention aims at solving the problems that in the prior art, in the process of coating a battery pole piece by adopting liquid slurry, the problems of foil leakage, folds, scratches, dark marks, dry materials, high energy consumption and the like are easy to occur, and particularly, in order to ensure that a coating can be dried, an oven needs to be lengthened, the high temperature is needed, and the coating speed cannot be too high. The lengthened oven is mainly used for improving the coating speed, and the scheme of the invention can reduce the length of the oven at the same speed because the water content is relatively low; the solid active material battery electrode material prepared by the invention can be better used for battery production, improves the battery production efficiency, reduces the production energy consumption and improves the product defect problem in the process.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present invention, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.
FIG. 1 is a diagram showing an electrode structure prepared by using the solid active material battery electrode material obtained in example 1 of the present invention;
FIG. 2 is a diagram showing an electrode material for a solid active material battery according to example 2 of the present invention;
fig. 3 is a diagram showing an electrode structure prepared by using the solid active material battery electrode material obtained in example 3 of the present invention.
Detailed Description
The invention provides a preparation method of a solid active material battery electrode material, which comprises the following steps:
And mixing the electrode components, and then sequentially carrying out kneading, grinding, secondary kneading, core extrusion, sintering, oil immersion and deoiling to obtain the solid active material battery electrode material.
In the invention, the electrode component comprises 10-80 parts of graphite, 20-80 parts of carbon black, 5-20 parts of talcum powder, 1-10 parts of binder and 120 parts of water; preferably 20-40 parts of graphite, 30-50 parts of carbon black, 8-15 parts of talcum powder, 2-8 parts of binder and 120 parts of water; it is more preferable that the amount of graphite is 30 parts, carbon black is 40 parts, talc is 10 parts, binder is 5 parts, and water is 120 parts.
In the invention, the binder comprises one or more of polyvinylidene fluoride, polyacrylic acid, carboxymethyl cellulose, UV glue and xanthan gum.
In the invention, the kneading time is 1-4 h, and can be specifically 1.5 h, 2h, 2.5 h, 3 h and 3.5 h; the kneading temperature is 0-85 ℃, specifically 10 ℃, 20 ℃, 30 ℃, 40 ℃, 50 ℃, 60 ℃, 70 ℃ and 80 ℃; the revolution speed of kneading is 20-300 rpm, and can be specifically 40 rpm, 50 rpm, 80 rpm, 100 rpm, 120 rpm, 150 rpm, 180 rpm, 200 rpm, 220 rpm, 250 rpm and 280 rpm; the rotation speed of kneading is 50 to 3000rpm, and specifically may be 100 rpm, 200 rpm, 500 rpm, 800 rpm, 1000 rpm, 1500 rpm, 2000 rpm, 2500 rpm.
In the invention, the grinding time is 0.5-3 h, and can be specifically 1h, 1.5 h, 2h and 2.5 h.
In the invention, the time of the secondary kneading is 0.5-2 h, and can be specifically 0.8 h, 1h, 1.2 h, 1.5 h, 1.6 h and 1.8 h; the temperature of the secondary kneading is 0-85 ℃, and specifically can be 10 ℃, 20 ℃,30 ℃, 40 ℃, 50 ℃, 60 ℃, 70 ℃ and 80 ℃; the revolution speed of the secondary kneading is 20-300 rpm, and can be specifically 40 rpm, 50 rpm, 80 rpm, 100 rpm, 120 rpm, 150 rpm, 180 rpm, 200 rpm, 220 rpm, 250 rpm and 280 rpm; the rotation speed of the secondary kneading is 50 to 3000rpm, and specifically may be 100 rpm, 200 rpm, 500 rpm, 800 rpm, 1000 rpm, 1500 rpm, 2000 rpm, 2500 rpm.
In the invention, the extrusion core is used for extrusion molding of the electrode component, and the extrusion molding pressure is 10-1000 kgf, and can be specifically 50 kgf, 100 kgf, 200 kgf, 400 kgf, 500 kgf, 600 kgf and 800 kgf.
In the present invention, the extrusion is preferably performed by using a hydraulic press.
In the invention, the sintering temperature is 60-150 ℃, specifically 70 ℃,80 ℃, 90 ℃, 100 ℃, 120 ℃ and 140 ℃; the time is 0.5-2 h, and can be specifically 0.8 h, 1h, 1.2 h, 1.4 h, 1.5h, 1.6 h and 1.8 h.
In the invention, the temperature of the immersion oil is 50-100 ℃, specifically 55 ℃, 60 ℃, 65 ℃, 70 ℃, 75 ℃, 80 ℃, 85 ℃, 90 ℃ and 95 ℃; the oil immersion time is 5-60 min, and can be specifically 10 min, 20min, 30min, 40min and 50 min.
In the invention, the oil immersion is preferably carried out in an oil immersion pot, preferably silicone oil is adopted for oil immersion, and the oil immersion has the function of enabling lubrication to be smooth, soft and not easy to break.
In the invention, the deoiling time is 2-30 min, and can be specifically 5min, 10min, 15 min, 20min and 15 min.
In the present invention, the deoiling is preferably performed using a centrifugal deoiler.
The invention also provides the solid active material battery electrode material prepared by the preparation method.
The following description of the technical solutions in the embodiments of the present invention will be clear and complete, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
Battery electrode composition: the weight portions of the components are as follows: 50 parts of graphite, 35 parts of carbon black, 10 parts of talcum powder, 5 parts of polyvinylidene fluoride (PVDF) and 120 parts of water.
The preparation process comprises the following steps: the components are mixed according to the weight parts, the mixture is kneaded in a kneader at 20 ℃ for 3h parts, the revolution speed of kneading is 100 rpm, the rotation speed is 500 rpm, the mixture is ground in a three-roll grinder for 1h after the kneading is finished, then the mixture is kneaded in a secondary kneader for 1h at 20 ℃, the revolution speed of the second kneading is 100 rpm, the rotation speed is 500 rpm, the mixture is extruded in a hydraulic press for 800 kgf and then dried in a core baking furnace, the mixture is sintered at 100 ℃ for 1h in an electric tunnel kiln, the mixture is immersed in an oil immersing pot (methyl silicone oil) for 30 min at 80 ℃, the oil is removed in a centrifugal deoiling machine for 10 min, and then the solid active material battery electrode material is obtained, the solid active material is rubbed and coated on a coating machine by a block finished product, and then the battery electrode plate is baked in an oven, as shown in fig. 1. The rubbed product is shown in fig. 1, and has fine surface quality, no problems of leakage, scratch, dark mark, etc., soft and fine chromaticity, and chromaticity of 55 (representing uniformity of surface density of electrode and uniformity of coating).
Example 2
Battery electrode composition: the weight portions of the components are as follows: 40 parts of graphite, 45 parts of carbon black, 10 parts of talcum powder, 5 parts of polyacrylic acid (PAA) and 120 parts of water.
The preparation process is the same as in example 1, and the obtained battery electrode plate is shown in fig. 2. The rubbed product is shown in fig. 2, and has fine surface quality, no problems of leakage, scratch, dark mark, etc., soft and fine chromaticity, and chromaticity of 41 (representing uniformity of surface density of electrode and uniformity of coating).
Example 3
Battery electrode composition: the weight portions of the components are as follows: 30 parts of graphite, 55 parts of carbon black, 10 parts of talcum powder, 5 parts of carboxymethyl cellulose (CMC) and 120 parts of water.
The preparation process is the same as in example 1, and the obtained battery electrode plate is shown in fig. 3. The rubbed product is shown in fig. 3, and has fine surface quality, no problems of leakage, scratch, dark mark, etc., soft and fine chromaticity, and chromaticity of 36 (representing uniformity of surface density of electrode and uniformity of coating).
Example 4
Battery electrode composition: the weight portions of the components are as follows: 80 parts of graphite, 60 parts of carbon black, 5 parts of talcum powder, 10 parts of polyvinylidene fluoride (PVDF) and 120 parts of water.
The preparation process comprises the following steps: the components are mixed according to the weight parts, the mixture is kneaded in a kneader at 50 ℃ for 1 h, the revolution speed of kneading is 200 rpm, the rotation speed is 1000 rpm, the mixture is ground in a three-roller grinder for 2 h after the kneading is finished, then the mixture is kneaded in a secondary kneader for 0.5 h at 20 ℃, the revolution speed of the secondary kneading is 200 rpm, the rotation speed is 800 rpm, the mixture is dried in a core baking furnace after being extruded by 200 kgf in a hydraulic press, the mixture is sintered in an electric tunnel kiln for 2 h at 60 ℃, the mixture is soaked in oil for 20 min at 100 ℃ in a soaking pot (methyl silicone oil), and the mixture is deoiled in a centrifugal deoiling machine for 15 min, thus obtaining the solid active material battery electrode material.
Example 5
Battery electrode composition: the weight portions of the components are as follows: 20 parts of graphite, 20 parts of carbon black, 6 parts of talcum powder, 3 parts of carboxymethyl cellulose (CMC) and 120 parts of water.
The preparation process comprises the following steps: the components are mixed according to the weight parts, are kneaded in a kneader at 10 ℃ for 4 h, the revolution speed of kneading is 50 rpm, the rotation speed is 200 rpm, the mixture is ground in a three-roller grinder after the kneading is finished for 3 h, then the mixture is kneaded in a secondary kneader at 20 ℃ for 1.5 h, the revolution speed of the secondary kneading is 50 rpm, the rotation speed is 200 rpm, the mixture is dried in a core baking furnace after being extruded by 500 kgf in a hydraulic press, sintered in an electric tunnel kiln at 150 ℃ for 2h, soaked in oil 50 min at 50 ℃ in a soaking pot (methyl silicone oil), and deoiled in a centrifugal deoiling machine for 30 min, and the solid active substance battery electrode material is obtained.
In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (7)
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| CN202411448592.3A CN119008836A (en) | 2024-10-17 | 2024-10-17 | Solid active material battery electrode material and preparation method thereof |
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| CN202411448592.3A CN119008836A (en) | 2024-10-17 | 2024-10-17 | Solid active material battery electrode material and preparation method thereof |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050271940A1 (en) * | 2004-06-07 | 2005-12-08 | Matsushita Electric Industrial Co., Ltd. | Electrode plate of positive electrode for non-aqueous electrolyte secondary battery and manufacturing method thereof |
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