CN113717595A - Carbon-coated current collector coating and preparation method thereof - Google Patents
Carbon-coated current collector coating and preparation method thereof Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D133/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
- C09D133/02—Homopolymers or copolymers of acids; Metal or ammonium salts thereof
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C253/00—Preparation of carboxylic acid nitriles
- C07C253/30—Preparation of carboxylic acid nitriles by reactions not involving the formation of cyano groups
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/08—Anti-corrosive paints
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/24—Electrically-conducting paints
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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
- 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
- H01M4/0404—Methods of deposition of the material by coating on electrode collectors
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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
- H01M4/64—Carriers or collectors
- H01M4/66—Selection of materials
- H01M4/663—Selection of materials containing carbon or carbonaceous materials as conductive part, e.g. graphite, carbon fibres
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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
- H01M4/64—Carriers or collectors
- H01M4/66—Selection of materials
- H01M4/665—Composites
- H01M4/667—Composites in the form of layers, e.g. coatings
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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
- H01M4/64—Carriers or collectors
- H01M4/66—Selection of materials
- H01M4/668—Composites of electroconductive material and synthetic resins
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- 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 invention discloses a carbon-coated current collector coating and a preparation method thereof, belonging to the technical field of lithium ion batteries, and the carbon-coated current collector coating comprises the following raw materials in percentage by mass: 1-10% of binder, 0.05-2% of dispersant, 2-15% of conductive material and the balance of solvent; the binding agent is obtained by modifying polyacrylic acid with a modifying component, the modifying component is provided with a carboxyl group, a cyano group and three phenolic hydroxyl groups, wherein the phenolic hydroxyl groups can react with the carboxyl groups on a polyacrylic acid chain to graft the modifying component onto polyacrylic acid molecules, and the phenolic hydroxyl groups also have good oxidation resistance and corrosion resistance, so that the corrosion of a current collector material can be greatly slowed down, the carboxyl groups can enable the prepared coating to have good dispersion wettability, and the cyano groups have strong polarity, so that a good adhesion effect can be achieved.
Description
Technical Field
The invention relates to the technical field of lithium ion batteries, in particular to a carbon-coated current collector coating and a preparation method thereof.
Background
Currently, lithium ion batteries have been widely used as a novel energy storage device in many fields, such as military fields, mobile communication devices, computers, and hybrid power sources of electric vehicles. Current collectors are an important component of electrochemical cells, and in lithium ion batteries, the surface of the current collector generally supports an electrode active material and contacts an electrolyte to provide an electron path for an electrochemical reaction, thereby accelerating the transfer of electrons and transferring the electrons to an external circuit to form a current. Therefore, the current collector plays a crucial role in the performance of the electrochemical cell. The current collector has the characteristics of high conductivity, good mechanical property, good adhesion property, small internal resistance and the like.
The existing current collector is usually composed of various conductive metal foils, such as copper foil, aluminum foil and the like, however, these metal foils are easily corroded and aged, in addition, the adhesion between the active substance and the current collector is poor, and the positive and negative electrode slurry is difficult to form uniform electrode active substance layers on these foils, so that the phenomena of material dropping, wrinkling and the like of the positive and negative electrode plates are caused, and the performance of the lithium ion battery is seriously affected.
Disclosure of Invention
The invention aims to provide a carbon-coated current collector coating and a preparation method thereof, which are used for solving the problems in the background art.
The purpose of the invention can be realized by the following technical scheme:
the carbon-coated current collector coating comprises the following raw materials in percentage by mass: 1 to 10 percent of binder, 0.05 to 2 percent of dispersant, 2 to 15 percent of conductive material and the balance of solvent.
The carbon-coated current collector coating is prepared by the following steps: mixing and stirring the conductive material, the binder, the dispersant and the solvent for 20-30min to obtain a carbon-coated current collector coating after stirring;
further, the adhesive is prepared by the following steps:
adding the modified component and polyacrylic acid into deionized water, stirring for 5h at room temperature, then slowly dropwise adding a methanol aqueous solution with the volume fraction of 20% while stirring, and stirring for reacting for 24h to obtain the binder.
Further, the modified component is prepared by the following steps:
step S1: adding p-aminobenzoic acid and absolute ethyl alcohol into a flask, stirring for 10min in an ice bath, then dropwise adding thionyl chloride into the flask by using a constant-pressure dropping funnel, controlling the temperature to be not more than 10 ℃ in the dropwise adding process, stirring for 20min at room temperature after the dropwise adding is finished, then heating up, refluxing and reacting for 10-12h, cooling to room temperature after the reaction is finished, and evaporating excess ethyl alcohol and thionyl chloride under reduced pressure to prepare an intermediate 1; the dosage ratio of the p-aminobenzoic acid, the absolute ethyl alcohol and the thionyl chloride is 0.2 mol: 500 mL: 0.21 mol;
the reaction process is as follows:
step S2: adding the intermediate 1 and ammonia water with the mass fraction of 25% into a flask, stirring at room temperature for 20min, heating to 70 ℃, reacting for 6h, cooling to room temperature after the reaction is finished, adjusting the pH to 4, stirring, filtering under reduced pressure, washing a filter cake with deionized water, and drying to obtain an intermediate 2; the dosage ratio of the intermediate 1 to ammonia water is 1 g: 7 mL;
the reaction process is as follows:
step S3: adding the intermediate 2, phosphorus pentoxide and toluene into a flask, heating to 110 ℃, stirring for reacting for 5-7h, removing the solvent after the reaction is finished, adding deionized water, extracting with ethyl acetate, combining organic phases, drying, filtering and concentrating to obtain an intermediate 3; the dosage ratio of the intermediate 2, the phosphorus pentoxide and the toluene is 0.04 mol: 0.2 mol: 480 mL;
the reaction process is as follows:
step S4: adding the intermediate 3, p-chlorobenzoic acid and toluene into a flask, introducing nitrogen for protection, adding palladium acetate, binaphthyl diphenyl phosphate and cesium carbonate, stirring and reacting at the temperature of 75-80 ℃ for 5-6h, and obtaining an intermediate 4 after the reaction is finished; the dosage ratio of the intermediate 3, p-chlorobenzoic acid, toluene, palladium acetate, binaphthyl diphenyl phosphate and cesium carbonate is 0.1 mol: 0.1 mol: 100mL of: 0.01 g: 0.03 g: 0.6 g;
the reaction process is as follows:
step S5: adding 3,4, 5-trihydroxybenzoic acid and deionized water into a flask, dropwise adding thionyl chloride and DMF into the flask, and after dropwise adding, carrying out reflux reaction for 4 hours to obtain an intermediate 5; the dosage ratio of the 3,4, 5-trihydroxybenzoic acid, the thionyl chloride and the DMF is 1 mol: 1.2 mol: 0.5 mL;
the reaction process is as follows:
step S6: adding the intermediate 4, the intermediate 5, tetrahydrofuran and pyridine into a flask, introducing nitrogen for protection, and stirring and reacting at the temperature of 0-5 ℃ for 3 hours to obtain a modified component; the dosage ratio of the intermediate 4 to the intermediate 5 to the tetrahydrofuran to the pyridine is 0.1 mol: 0.1 mol: 50mL of: 0.1 mol;
the reaction process is as follows:
further, the conductive material is any one or more of carbon black, layered conductive graphite, carbon nanotubes and carbon fibers;
further, the dispersant is any one of laurylamine, rosin amine and oleylamine;
further, the solvent is any one or more of ethanol, acetone, isopropanol, N-methyl pyrrolidone, dimethylformamide, diethylformamide, dimethyl sulfoxide and tetrahydrofuran.
A preparation method of a carbon-coated current collector coating comprises the following steps: mixing and stirring the conductive material, the binder, the dispersant and the solvent for 20-30min to obtain the carbon-coated current collector coating.
The invention provides a carbon-coated current collector coating and a preparation method thereof. Compared with the prior art, the method has the following beneficial effects: the invention uses modified polyacrylic acid as the binder of the paint when preparing the current collector paint, the modified component firstly generates acylation reaction to p-aminobenzoic acid under the action of thionyl chloride to convert into p-aminobenzoic chloride, then the acyl chloride group and ethanol are esterified to prepare an intermediate 1, the intermediate 1 is ammoniated to prepare an intermediate 2 under the environment of ammonia water, the intermediate 2 is oxidized to prepare an intermediate 3 with cyano under the system of dichloro pentoxide/toluene, then the intermediate 3 and p-chlorobenzoic acid are reacted to prepare an intermediate 4, then the carboxyl of 3,4, 5-trihydroxybenzoic acid is converted into acyl chloride to react with the intermediate 4 to prepare the final modified component, the modified component has a carboxyl, a cyano and three phenolic hydroxyl groups, wherein the phenolic hydroxyl groups can not only react with the carboxyl groups on the polyacrylic acid chain, the modified component is grafted to polyacrylic acid molecules, so that the modified component becomes a side chain of polyacrylic acid, the phenolic hydroxyl group has good antioxidant and corrosion resistant activities, the corrosion of a current collector material can be greatly slowed down, the carboxyl group in the modified component can enable the prepared coating to have good dispersion and wetting properties, and the cyano group in the modified component has strong polarity and can play a good role in adhesion.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
Preparing a modified component, wherein the modified component is prepared by the following steps:
step S1: adding p-aminobenzoic acid and absolute ethyl alcohol into a flask, stirring for 10min in an ice bath, then dropwise adding thionyl chloride into the flask by using a constant-pressure dropping funnel, controlling the temperature to be not more than 10 ℃ in the dropwise adding process, stirring for 20min at room temperature after the dropwise adding is finished, then heating up, refluxing and reacting for 10h, cooling to room temperature after the reaction is finished, and evaporating excess ethyl alcohol and thionyl chloride under reduced pressure to prepare an intermediate 1; the dosage ratio of the p-aminobenzoic acid, the absolute ethyl alcohol and the thionyl chloride is 0.2 mol: 500 mL: 0.21 mol;
step S2: adding the intermediate 1 and ammonia water with the mass fraction of 25% into a flask, stirring at room temperature for 20min, heating to 70 ℃, reacting for 6h, cooling to room temperature after the reaction is finished, adjusting the pH to 4, stirring, filtering under reduced pressure, washing a filter cake with deionized water, and drying to obtain an intermediate 2; the dosage ratio of the intermediate 1 to ammonia water is 1 g: 7 mL;
step S3: adding the intermediate 2, phosphorus pentoxide and toluene into a flask, heating to 110 ℃, stirring for reacting for 5 hours, removing the solvent after the reaction is finished, adding deionized water, extracting with ethyl acetate, combining organic phases, drying, filtering and concentrating to obtain an intermediate 3; the dosage ratio of the intermediate 2, the phosphorus pentoxide and the toluene is 0.04 mol: 0.2 mol: 480 mL;
step S4: adding the intermediate 3, p-chlorobenzoic acid and toluene into a flask, introducing nitrogen for protection, adding palladium acetate, binaphthyl diphenyl phosphate and cesium carbonate, stirring and reacting at the temperature of 75 ℃ for 5 hours, and obtaining an intermediate 4 after the reaction is finished; the dosage ratio of the intermediate 3, p-chlorobenzoic acid, toluene, palladium acetate, binaphthyl diphenyl phosphate and cesium carbonate is 0.1 mol: 0.1 mol: 100mL of: 0.01 g: 0.03 g: 0.6 g;
step S5: adding 3,4, 5-trihydroxybenzoic acid and deionized water into a flask, dropwise adding thionyl chloride and DMF into the flask, and after dropwise adding, carrying out reflux reaction for 4 hours to obtain an intermediate 5; the dosage ratio of the 3,4, 5-trihydroxybenzoic acid, the thionyl chloride and the DMF is 1 mol: 1.2 mol: 0.5 mL;
step S6: adding the intermediate 4, the intermediate 5, tetrahydrofuran and pyridine into a flask, introducing nitrogen for protection, and stirring and reacting at the temperature of 0 ℃ for 3 hours to obtain a modified component; the dosage ratio of the intermediate 4 to the intermediate 5 to the tetrahydrofuran to the pyridine is 0.1 mol: 0.1 mol: 50mL of: 0.1 mol;
example 2
Preparing a modified component, wherein the modified component is prepared by the following steps:
step S1: adding p-aminobenzoic acid and absolute ethyl alcohol into a flask, stirring for 10min in an ice bath, then dropwise adding thionyl chloride into the flask by using a constant-pressure dropping funnel, controlling the temperature to be not more than 10 ℃ in the dropwise adding process, stirring for 20min at room temperature after the dropwise adding is finished, then heating up, refluxing and reacting for 11h, cooling to room temperature after the reaction is finished, and evaporating excess ethyl alcohol and thionyl chloride under reduced pressure to prepare an intermediate 1; the dosage ratio of the p-aminobenzoic acid, the absolute ethyl alcohol and the thionyl chloride is 0.2 mol: 500 mL: 0.21 mol;
step S2: adding the intermediate 1 and ammonia water with the mass fraction of 25% into a flask, stirring at room temperature for 20min, heating to 70 ℃, reacting for 6h, cooling to room temperature after the reaction is finished, adjusting the pH to 4, stirring, filtering under reduced pressure, washing a filter cake with deionized water, and drying to obtain an intermediate 2; the dosage ratio of the intermediate 1 to ammonia water is 1 g: 7 mL;
step S3: adding the intermediate 2, phosphorus pentoxide and toluene into a flask, heating to 110 ℃, stirring for reacting for 6 hours, removing the solvent after the reaction is finished, adding deionized water, extracting with ethyl acetate, combining organic phases, drying, filtering and concentrating to obtain an intermediate 3; the dosage ratio of the intermediate 2, the phosphorus pentoxide and the toluene is 0.04 mol: 0.2 mol: 480 mL;
step S4: adding the intermediate 3, p-chlorobenzoic acid and toluene into a flask, introducing nitrogen for protection, adding palladium acetate, binaphthyl diphenyl phosphate and cesium carbonate, stirring and reacting at the temperature of 77.5 ℃ for 5.5 hours, and obtaining an intermediate 4 after the reaction is finished; the dosage ratio of the intermediate 3, p-chlorobenzoic acid, toluene, palladium acetate, binaphthyl diphenyl phosphate and cesium carbonate is 0.1 mol: 0.1 mol: 100mL of: 0.01 g: 0.03 g: 0.6 g;
step S5: adding 3,4, 5-trihydroxybenzoic acid and deionized water into a flask, dropwise adding thionyl chloride and DMF into the flask, and after dropwise adding, carrying out reflux reaction for 4 hours to obtain an intermediate 5; the dosage ratio of the 3,4, 5-trihydroxybenzoic acid, the thionyl chloride and the DMF is 1 mol: 1.2 mol: 0.5 mL;
step S6: adding the intermediate 4, the intermediate 5, tetrahydrofuran and pyridine into a flask, introducing nitrogen for protection, and stirring and reacting at the temperature of 3 ℃ for 3 hours to obtain a modified component; the dosage ratio of the intermediate 4 to the intermediate 5 to the tetrahydrofuran to the pyridine is 0.1 mol: 0.1 mol: 50mL of: 0.1 mol;
example 3
Preparing a modified component, wherein the modified component is prepared by the following steps:
step S1: adding p-aminobenzoic acid and absolute ethyl alcohol into a flask, stirring for 10min in an ice bath, then dropwise adding thionyl chloride into the flask by using a constant-pressure dropping funnel, controlling the temperature to be not more than 10 ℃ in the dropwise adding process, stirring for 20min at room temperature after the dropwise adding is finished, then heating up, refluxing and reacting for 12h, cooling to room temperature after the reaction is finished, and evaporating excess ethyl alcohol and thionyl chloride under reduced pressure to prepare an intermediate 1; the dosage ratio of the p-aminobenzoic acid, the absolute ethyl alcohol and the thionyl chloride is 0.2 mol: 500 mL: 0.21 mol;
step S2: adding the intermediate 1 and ammonia water with the mass fraction of 25% into a flask, stirring at room temperature for 20min, heating to 70 ℃, reacting for 6h, cooling to room temperature after the reaction is finished, adjusting the pH to 4, stirring, filtering under reduced pressure, washing a filter cake with deionized water, and drying to obtain an intermediate 2; the dosage ratio of the intermediate 1 to ammonia water is 1 g: 7 mL;
step S3: adding the intermediate 2, phosphorus pentoxide and toluene into a flask, heating to 110 ℃, stirring for reaction for 7 hours, removing the solvent after the reaction is finished, adding deionized water, extracting with ethyl acetate, combining organic phases, drying, filtering and concentrating to obtain an intermediate 3; the dosage ratio of the intermediate 2, the phosphorus pentoxide and the toluene is 0.04 mol: 0.2 mol: 480 mL;
step S4: adding the intermediate 3, p-chlorobenzoic acid and toluene into a flask, introducing nitrogen for protection, adding palladium acetate, binaphthyl diphenyl phosphate and cesium carbonate, stirring and reacting at the temperature of 80 ℃ for 6 hours, and obtaining an intermediate 4 after the reaction is finished; the dosage ratio of the intermediate 3, p-chlorobenzoic acid, toluene, palladium acetate, binaphthyl diphenyl phosphate and cesium carbonate is 0.1 mol: 0.1 mol: 100mL of: 0.01 g: 0.03 g: 0.6 g;
step S5: adding 3,4, 5-trihydroxybenzoic acid and deionized water into a flask, dropwise adding thionyl chloride and DMF into the flask, and after dropwise adding, carrying out reflux reaction for 4 hours to obtain an intermediate 5; the dosage ratio of the 3,4, 5-trihydroxybenzoic acid, the thionyl chloride and the DMF is 1 mol: 1.2 mol: 0.5 mL;
step S6: adding the intermediate 4, the intermediate 5, tetrahydrofuran and pyridine into a flask, introducing nitrogen for protection, and stirring and reacting at the temperature of 5 ℃ for 3 hours to obtain a modified component; the dosage ratio of the intermediate 4 to the intermediate 5 to the tetrahydrofuran to the pyridine is 0.1 mol: 0.1 mol: 50mL of: 0.1 mol;
example 4
Preparing a binder, wherein the binder is prepared by the following steps:
adding the modified component in the embodiment 2 and polyacrylic acid into deionized water, stirring for 5h at room temperature, then slowly dripping 20% volume fraction methanol aqueous solution while stirring, and stirring for reaction for 24h to obtain the binder.
Example 5
The carbon-coated current collector coating comprises the following raw materials in percentage by mass: 1% of the binder prepared in example 4, 0.05% of dispersant, 2% of conductive material, the balance being made up by solvent.
The carbon-coated current collector coating is prepared by the following steps: mixing and stirring the conductive material, the binder, the dispersant and the solvent for 20min to obtain the carbon-coated current collector coating after the stirring is finished.
Example 6
The carbon-coated current collector coating comprises the following raw materials in percentage by mass: 5% of the binder prepared in example 4, 1% of dispersant, 8% of conductive material, the balance being made up by solvent.
The carbon-coated current collector coating is prepared by the following steps: mixing and stirring the conductive material, the binder, the dispersant and the solvent for 25min to obtain the carbon-coated current collector coating after stirring.
Example 7
The carbon-coated current collector coating comprises the following raw materials in percentage by mass: 10% of the binder prepared in example 4, 2% of dispersant, 15% of conductive material, the balance being made up by solvent.
The carbon-coated current collector coating is prepared by the following steps: mixing and stirring the conductive material, the binder, the dispersant and the solvent for 30min to obtain the carbon-coated current collector coating.
Comparative example 1: in comparison with example 6, unmodified polyacrylic acid was used as binder.
Comparative example 2: in comparison with example 6, polyvinyl alcohol was used as a binder.
Comparative example 3: in comparison with example 6, sodium carboxymethylcellulose was used as binder.
The performance tests of examples 5-7 and comparative examples 1-3 were performed, and the prepared coating was applied to a current collector substrate in an electrostatic coating manner, with a coating thickness of 1 μm;
a peeling strength test is carried out by using a peeling force tester, the stainless steel plate and the current collector are fixed on a clamp of the peeling force tester, and then a 180-degree peeling test is carried out at a speed of 10mm/min and a load of 10N; resistivity measurements were performed using a pole piece resistance meter and the results are shown in the following table:
it can be seen from the above table that examples 5 to 7 have good adhesion properties, and can reduce the interfacial resistance of the electrode and reduce the internal resistance of the battery.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. The carbon-coated current collector coating is characterized by comprising the following raw materials in percentage by mass: 1-10% of binder, 0.05-2% of dispersant, 2-15% of conductive material and the balance of solvent;
the adhesive is prepared by the following steps:
adding the modified component and polyacrylic acid into deionized water, stirring for 5h at room temperature, then dropwise adding a methanol aqueous solution with the volume fraction of 20% while stirring, and stirring for reacting for 24h to obtain the binder.
2. The carbon-coated current collector coating of claim 1, wherein the modifying component is prepared by the steps of:
step S1: adding p-aminobenzoic acid and absolute ethyl alcohol into a flask, stirring for 10min in an ice bath, then dropwise adding thionyl chloride into the flask, controlling the temperature to be not more than 10 ℃ in the dropwise adding process, stirring for 20min at room temperature after dropwise adding is finished, then heating and carrying out reflux reaction for 10-12h, and obtaining an intermediate 1 after the reaction is finished;
step S2: adding the intermediate 1 and ammonia water with the mass fraction of 25% into a flask, stirring for 20min at room temperature, heating to 70 ℃, reacting for 6h, and obtaining an intermediate 2 after the reaction is finished;
step S3: adding the intermediate 2, phosphorus pentoxide and toluene into a flask, heating to 110 ℃, stirring for reacting for 5-7h, and obtaining an intermediate 3 after the reaction is finished;
step S4: adding the intermediate 3, p-chlorobenzoic acid and toluene into a flask, introducing nitrogen for protection, adding palladium acetate, binaphthyl diphenyl phosphate and cesium carbonate, stirring and reacting at the temperature of 75-80 ℃ for 5-6h, and obtaining an intermediate 4 after the reaction is finished;
step S5: adding 3,4, 5-trihydroxybenzoic acid and deionized water into a flask, dropwise adding thionyl chloride and DMF into the flask, and after dropwise adding, carrying out reflux reaction for 4 hours to obtain an intermediate 5;
step S6: adding the intermediate 4, the intermediate 5, tetrahydrofuran and pyridine into a flask, introducing nitrogen for protection, and stirring and reacting at the temperature of 0-5 ℃ for 3 hours to obtain the modified component.
3. The carbon-coated current collector coating according to claim 1, wherein the conductive material is any one or more of carbon black, layered conductive graphite, carbon nanotubes and carbon fibers.
4. The carbon-coated current collector coating according to claim 1, wherein the dispersant is any one of laurylamine, rosin amine, and oleylamine.
5. The carbon-coated current collector coating according to claim 1, wherein the solvent is any one or more of ethanol, acetone, isopropanol, N-methylpyrrolidone, dimethylformamide, diethylformamide, dimethyl sulfoxide and tetrahydrofuran.
6. The method of preparing a carbon-coated current collector coating according to claim 1, comprising the steps of: mixing and stirring the conductive material, the binder, the dispersant and the solvent for 20-30min to obtain the carbon-coated current collector coating.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114247299A (en) * | 2021-12-22 | 2022-03-29 | 安庆市鑫祥瑞环保科技有限公司 | Preparation method of solvent-resistant composite nanofiltration membrane |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101649005A (en) * | 2009-09-09 | 2010-02-17 | 中国海洋大学 | Para aminobenzoyl chitosan and preparing method thereof |
| WO2015199251A1 (en) * | 2014-06-23 | 2015-12-30 | 동아대학교 산학협력단 | Nanoparticle-graphene-carbon composite having graphene network formed therein, preparation method therefor and application thereof |
| CN110034302A (en) * | 2019-03-28 | 2019-07-19 | 合肥国轩高科动力能源有限公司 | A kind of ultra-thin utter misery collector and preparation method thereof |
| CN110676462A (en) * | 2019-10-14 | 2020-01-10 | 福建巨电新能源股份有限公司 | Carbon-coated aluminum foil for lithium battery and preparation method thereof |
| CN111180741A (en) * | 2020-01-03 | 2020-05-19 | 松山湖材料实验室 | Carbon-coated current collector coated with three-dimensional graphene powder and preparation method thereof |
-
2021
- 2021-07-14 CN CN202110795926.4A patent/CN113717595A/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101649005A (en) * | 2009-09-09 | 2010-02-17 | 中国海洋大学 | Para aminobenzoyl chitosan and preparing method thereof |
| WO2015199251A1 (en) * | 2014-06-23 | 2015-12-30 | 동아대학교 산학협력단 | Nanoparticle-graphene-carbon composite having graphene network formed therein, preparation method therefor and application thereof |
| CN110034302A (en) * | 2019-03-28 | 2019-07-19 | 合肥国轩高科动力能源有限公司 | A kind of ultra-thin utter misery collector and preparation method thereof |
| CN110676462A (en) * | 2019-10-14 | 2020-01-10 | 福建巨电新能源股份有限公司 | Carbon-coated aluminum foil for lithium battery and preparation method thereof |
| CN111180741A (en) * | 2020-01-03 | 2020-05-19 | 松山湖材料实验室 | Carbon-coated current collector coated with three-dimensional graphene powder and preparation method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114247299A (en) * | 2021-12-22 | 2022-03-29 | 安庆市鑫祥瑞环保科技有限公司 | Preparation method of solvent-resistant composite nanofiltration membrane |
| CN114247299B (en) * | 2021-12-22 | 2024-04-23 | 安庆市鑫祥瑞环保科技有限公司 | Preparation method of solvent-resistant composite nanofiltration membrane |
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