CN111477870A - Composition, preparation method and application of composition in conductive paste - Google Patents
Composition, preparation method and application of composition in conductive paste Download PDFInfo
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- CN111477870A CN111477870A CN201911305394.0A CN201911305394A CN111477870A CN 111477870 A CN111477870 A CN 111477870A CN 201911305394 A CN201911305394 A CN 201911305394A CN 111477870 A CN111477870 A CN 111477870A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
- H01M4/624—Electric conductive fillers
- H01M4/625—Carbon or graphite
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
- H01B1/04—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors mainly consisting of carbon-silicon compounds, carbon or silicon
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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 belongs to the field of research and development of battery products, and particularly relates to a composition, a preparation method and application of the composition in conductive paste. The present invention provides a composition comprising: a dispersant and a carbon material; the carbon material is selected from: any one or more of expanded graphite, flake graphite, crystalline graphite, cryptocrystalline graphite, carbon fiber, pyrolytic carbon, foam graphite, and ketjen black. The invention provides a preparation method of the composition, and application of the composition or a product obtained by the preparation method in conductive paste. According to the invention, the aqueous graphene conductive slurry is directly prepared by a physical stripping method, so that the preparation cost and time are effectively saved, and simultaneously, the graphene can be uniformly and stably dispersed in the solvent; the technical defects that in the prior art, the graphite emulsion in the battery is difficult to give consideration to good conductivity, corrosion resistance, adhesive force and small pollution are overcome.
Description
Technical Field
The invention belongs to the field of research and development of battery products, and particularly relates to a composition, a preparation method and application of the composition in conductive paste.
Background
With the advance of technology and the rapid development of economy, more and more electronic products are produced, which require a large amount of chemical power sources, and the common chemical power sources include: alkaline batteries, carbon batteries, lithium iron batteries, lead storage batteries, lithium ion batteries, and the like. Most of the positive and negative active materials of the battery are directly placed in the metal shell through the metal current collectors, and the contact with the metal can cause the phenomena of large internal resistance of the battery and corrosion of the shell.
The alkaline zinc-manganese battery has small internal resistance, low self-discharge during storage and MnO 2 The high-efficiency energy-saving battery has the excellent performances of high utilization rate, repeated charging and the like, and is a commonly used energy supply battery for large-current working equipment used in daily life. The alkaline battery comprises a steel shell, a positive electrode, a negative electrode, a diaphragm and electrolyte; the steel shell is a container for loading chemical active substances, and is also a current collector of the anode, so that in order to reduce the contact resistance between the steel shell and the anode ring and prevent the electrolyte from corroding the inner surface of the steel shell, a layer of conductive graphite emulsion is usually sprayed on the inner wall of the steel shell.
In the prior art, the graphite emulsion used in the battery is usually prepared from an organic solvent with strong volatility, so that the graphite emulsion has great harm to human bodies and the environment, is easy to pollute, and needs to be further improved in conductivity, corrosion resistance and adhesion.
Therefore, a composition, a preparation method and an application thereof in conductive paste are developed to solve the technical defects that in the prior art, graphite emulsion in a battery has difficulty in simultaneously achieving good conductivity, corrosion resistance, adhesion and small pollution, and thus the problem to be solved by the technical staff in the field is urgently needed.
Disclosure of Invention
In view of the above, the invention provides a composition, a preparation method and an application thereof in conductive paste, which are used for solving the technical defects that in the prior art, graphite emulsion in a battery is difficult to have good conductivity, corrosion resistance, adhesion and low pollution.
The invention provides a composition, which comprises the following raw materials: a dispersant and a carbon material;
the carbon material is selected from: any one or more of expanded graphite, flake graphite, crystalline graphite, cryptocrystalline graphite, carbon fiber, pyrolytic carbon, foam graphite, and ketjen black.
Preferably, the raw materials of the composition comprise the following components in parts by mass: 15-30 parts of dispersing agent and 50-100 parts of carbon material.
Preferably, the dispersant is selected from: any one or more of an anionic wetting dispersant, a cationic wetting dispersant and a non-ionic wetting dispersant.
Preferably, the anionic wetting dispersant is selected from: any one or more of carboxylate dispersant, sulfate dispersant, phosphate dispersant and sulfonate dispersant.
Preferably, the cationic wetting and dispersing agent is selected from: any one or more of amine salt dispersant, quaternary ammonium salt dispersant and pyridinium salt dispersant.
Preferably, the non-ionic wetting dispersant is selected from: any one or more of ethylene glycol dispersant, polyhydric alcohol dispersant and cellulose dispersant.
Preferably, the raw materials of the composition further comprise: an auxiliary agent;
the auxiliary agent is selected from: any one or more of an emulsifier, a defoaming agent, a wetting agent, a curing agent, a film forming agent, a leveling agent and a rheological agent.
The invention provides a preparation method of the composition, which comprises the following steps: dispersing after dissolving the dispersant in deionized water, mixing with carbon material and shearing to obtain the product.
Preferably, the preparation method further comprises the following steps: any one or more of homogenization, ball milling, sanding and ultrasonic dispersion;
the homogenizing, ball milling, sanding and ultrasonic dispersing are carried out after the shearing step.
The invention provides an application of the composition or the product obtained by the preparation method in conductive paste.
In summary, the present invention provides a composition, which comprises the following raw materials: a dispersant and a carbon material; the carbon material is selected from: any one or more of expanded graphite, flake graphite, crystalline graphite, cryptocrystalline graphite, carbon fiber, pyrolytic carbon, foam graphite, and ketjen black. The invention provides a preparation method of the composition, and application of the composition or a product obtained by the preparation method in conductive paste. According to the technical scheme provided by the invention, the aqueous graphene conductive slurry is directly prepared by a physical stripping method, so that the preparation cost and time are effectively saved, and simultaneously, the graphene can be uniformly and stably dispersed in the solvent; further, through detection, compared with a commercially available reference product, the product prepared by the technical scheme provided by the invention has good conductivity, corrosion resistance and water resistance, and has better adhesive force with a base material. The composition, the preparation method and the application of the composition in the conductive paste solve the technical defects that in the prior art, the graphite emulsion in the battery is difficult to give consideration to good conductivity, corrosion resistance, adhesive force and small pollution.
Detailed Description
The invention provides a composition, a preparation method and application thereof in conductive paste, which are used for solving the technical defects that in the prior art, the graphite emulsion in a battery is difficult to give consideration to good conductivity, corrosion resistance, adhesive force and small pollution.
The technical solutions in the embodiments of the present invention will be described clearly and completely below, 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.
In order to illustrate the present invention in more detail, a composition, a preparation method and an application thereof in conductive paste provided by the present invention are specifically described below with reference to examples.
Example 1
This example is a specific example of preparing a graphene conductive paste product 1.
Dissolving 15g of dispersing agent in 1L of deionized water, dispersing for 2h at the rotating speed of 500r/min, mixing with 5g of carbon material, and shearing for 3h at the rotating speed of 3000r/min to obtain the graphene conductive slurry product 1.
In this example, the carbon material was expanded graphite, and the dispersant was an anionic wetting dispersant phosphate dispersant.
In the embodiment, the whole preparation process is carried out in a room temperature environment, and a circulating cold water bath cooling mode can be adopted to cool the reaction system, so that agglomeration in the reaction system is prevented.
In the practical application process, any one or more of an emulsifier, a defoaming agent, a wetting agent, a curing agent, a film forming agent, a leveling agent and a rheological agent can be added into the raw materials according to specific individual requirements.
In the process of practical application, any one or more steps of homogenizing, ball milling, sanding and ultrasonic dispersion can be added after shearing according to the specific real-time shearing effect and the requirements of different application scenes, so that the preparation process is further optimized.
Example 2
This example is a specific example of preparing a graphene conductive paste product 2.
And after 20g of dispersing agent is dissolved in 1L of deionized water, dispersing for 2h at the rotating speed of 500r/min, mixing with 6g of carbon material, and shearing for 3h at the rotating speed of 3000r/min to obtain a graphene conductive slurry product 2.
In this example, the carbon material is flake graphite, and the dispersant is a mixture of an anionic wetting dispersant, a sulfate dispersant, and a sulfonate dispersant.
In the embodiment, the whole preparation process is carried out in a room temperature environment, and a circulating cold water bath cooling mode can be adopted to cool the reaction system, so that caking in the reaction system is prevented.
In the practical application process, any one or more of an emulsifier, a defoaming agent, a wetting agent, a curing agent, a film forming agent, a leveling agent and a rheological agent can be added into the raw materials according to specific individual requirements.
In the process of practical application, any one or more steps of homogenizing, ball milling, sanding and ultrasonic dispersion can be added after shearing according to the specific real-time shearing effect and the requirements of different application scenes, so that the preparation process is further optimized.
Example 3
This example is a specific example of preparing a graphene conductive paste product 3.
Dissolving 25g of dispersing agent in 1L of deionized water, dispersing for 2h at the rotating speed of 500r/min, mixing with 10g of carbon material, and shearing for 3h at the rotating speed of 3000r/min to obtain a graphene conductive slurry product 3.
In this embodiment, the carbon material is crystalline graphite, and the dispersant is an anionic wetting dispersant carboxylate dispersant.
In the embodiment, the whole preparation process is carried out in a room temperature environment, and a circulating cold water bath cooling mode can be adopted to cool the reaction system, so that caking in the reaction system is prevented.
In the practical application process, any one or more of an emulsifier, a defoaming agent, a wetting agent, a curing agent, a film forming agent, a leveling agent and a rheological agent can be added into the raw materials according to specific individual requirements.
In the process of practical application, any one or more steps of homogenizing, ball milling, sanding and ultrasonic dispersion can be added after shearing according to the specific real-time shearing effect and the requirements of different application scenes, so that the preparation process is further optimized.
Example 4
This example is a specific example of preparing a graphene conductive paste product 4.
And dissolving 30g of dispersing agent in 1L of deionized water, dispersing for 2h at the rotating speed of 500r/min, mixing with 8g of carbon material, and shearing for 3h at the rotating speed of 3000r/min to obtain a graphene conductive slurry product 4.
In this embodiment, the carbon material is cryptocrystalline graphite, and the dispersant is a cationic wetting dispersant amine salt dispersant.
In the embodiment, the whole preparation process is carried out in a room temperature environment, and a circulating cold water bath cooling mode can be adopted to cool the reaction system, so that caking in the reaction system is prevented.
In the practical application process, any one or more of an emulsifier, a defoaming agent, a wetting agent, a curing agent, a film forming agent, a leveling agent and a rheological agent can be added into the raw materials according to specific individual requirements.
In the process of practical application, any one or more steps of homogenizing, ball milling, sanding and ultrasonic dispersion can be added after shearing according to the specific real-time shearing effect and the requirements of different application scenes, so that the preparation process is further optimized.
Example 5
This example is a specific example of preparing a graphene conductive paste product 5.
Dissolving 18g of dispersing agent in 1L of deionized water, dispersing for 2h at the rotating speed of 500r/min, mixing with 7g of carbon material, and shearing for 3h at the rotating speed of 3000r/min to obtain the graphene conductive slurry product 5.
In this embodiment, the carbon material is carbon fiber, and the dispersant is a cationic wetting dispersant quaternary ammonium salt dispersant.
In the embodiment, the whole preparation process is carried out in a room temperature environment, and a circulating cold water bath cooling mode can be adopted to cool the reaction system, so that caking in the reaction system is prevented.
In the practical application process, any one or more of an emulsifier, a defoaming agent, a wetting agent, a curing agent, a film forming agent, a leveling agent and a rheological agent can be added into the raw materials according to specific individual requirements.
In the process of practical application, any one or more steps of homogenizing, ball milling, sanding and ultrasonic dispersion can be added after shearing according to the specific real-time shearing effect and the requirements of different application scenes, so that the preparation process is further optimized.
Example 6
This example is a specific example of preparing a graphene conductive paste product 6.
And dissolving 30g of dispersing agent in 1L of deionized water, dispersing for 2h at the rotating speed of 500r/min, mixing with 5g of carbon material, and shearing for 3h at the rotating speed of 3000r/min to obtain a graphene conductive slurry product 6.
In this embodiment, the carbon material is pyrolytic carbon, and the dispersant is a cationic wetting dispersant pyridinium salt dispersant.
In the embodiment, the whole preparation process is carried out in a room temperature environment, and a circulating cold water bath cooling mode can be adopted to cool the reaction system, so that caking in the reaction system is prevented.
In the practical application process, any one or more of an emulsifier, a defoaming agent, a wetting agent, a curing agent, a film forming agent, a leveling agent and a rheological agent can be added into the raw materials according to specific individual requirements.
In the practical application process, any one or more steps of homogenizing, ball milling, sanding and ultrasonic dispersion can be added after shearing according to the specific real-time shearing effect and the requirements on different application scenes, so that the preparation process is further optimized.
Example 7
This example is a specific example of preparing a graphene conductive paste product 7.
Dissolving 22g of dispersing agent in 1L of deionized water, dispersing for 2h at the rotating speed of 500r/min, mixing with 9g of carbon material, and shearing for 3h at the rotating speed of 3000r/min to obtain a graphene conductive slurry product 7.
In this example, the carbon material is graphite foam, and the dispersant is a non-ionic wetting dispersant, glycol dispersant.
In the embodiment, the whole preparation process is carried out in a room temperature environment, and a circulating cold water bath cooling mode can be adopted to cool the reaction system, so that caking in the reaction system is prevented.
In the practical application process, any one or more of an emulsifier, a defoaming agent, a wetting agent, a curing agent, a film forming agent, a leveling agent and a rheological agent can be added into the raw materials according to specific individual requirements.
In the process of practical application, any one or more steps of homogenizing, ball milling, sanding and ultrasonic dispersion can be added after shearing according to the specific real-time shearing effect and the requirements of different application scenes, so that the preparation process is further optimized.
Example 8
This example is a specific example of preparing a graphene conductive paste product 8.
Dissolving 25g of dispersing agent in 1L of deionized water, dispersing for 2h at the rotating speed of 500r/min, mixing with 10g of carbon material, and shearing for 3h at the rotating speed of 3000r/min to obtain a graphene conductive slurry product 8.
In this example, the carbon material was ketjen black, and the dispersant was a nonionic wetting dispersant, a polyol dispersant.
In the embodiment, the whole preparation process is carried out in a room temperature environment, and a circulating cold water bath cooling mode can be adopted to cool the reaction system, so that caking in the reaction system is prevented.
In the practical application process, any one or more of an emulsifier, a defoaming agent, a wetting agent, a curing agent, a film forming agent, a leveling agent and a rheological agent can be added into the raw materials according to specific individual requirements.
In the process of practical application, any one or more steps of homogenizing, ball milling, sanding and ultrasonic dispersion can be added after shearing according to the specific real-time shearing effect and the requirements of different application scenes, so that the preparation process is further optimized.
Example 9
This example is a specific example of preparing a graphene conductive paste product 9.
Dissolving 50g of dispersing agent in 3L of deionized water, dispersing for 2h at the rotating speed of 500r/min, mixing with 150g of carbon material, and shearing for 3h at the rotating speed of 3000r/min to obtain the graphene conductive slurry product 9.
In this example, the carbon material is expanded graphite, and the dispersant is a cellulose dispersant as a nonionic wetting dispersant.
In the embodiment, the whole preparation process is carried out in a room temperature environment, and a circulating cold water bath cooling mode can be adopted to cool the reaction system, so that caking in the reaction system is prevented.
In the practical application process, any one or more of an emulsifier, a defoaming agent, a wetting agent, a curing agent, a film forming agent, a leveling agent and a rheological agent can be added into the raw materials according to specific individual requirements.
In the process of practical application, any one or more steps of homogenizing, ball milling, sanding and ultrasonic dispersion can be added after shearing according to the specific real-time shearing effect and the requirements of different application scenes, so that the preparation process is further optimized.
Example 10
This example is a specific example for measuring the conductivity, corrosion resistance and adhesion of the graphene conductive paste products 1 to 10 prepared in examples 1 to 10. In this example, the control used was a commercially available homogeneous graphite emulsion.
10.1 measurement of conductivity
The prepared slurry is evenly spread on a PET film by scraping, the wet film thickness is 100 mu m, after the slurry is fully dried, the surface resistance is tested by adopting a four-probe method, and the average value is obtained by taking points for multiple times. The coating was 10cm long ﹡ cm wide.
10.2 determination of Corrosion resistance
The salt spray resistance test is carried out according to the regulation of GB/T1733-93.
10.3 determination of adhesion
The paint film adhesion is tested by adopting a cross-cut method according to the GB/T9286-1998 standard.
10.4 results of the experiment
The above measurement results are shown in Table 1.
TABLE 1
As can be seen from the table 1, compared with a reference substance, the product prepared by the technical scheme provided by the invention has good conductivity, water resistance, corrosion resistance and adhesive force; further combining with the embodiments 1 to 9, in the preparation process, high-pollution, high-toxicity and high-volatility raw materials are not used, the preparation process is simple and convenient, no pollution is generated, and the raw materials are low in price and easy to obtain, so that the method is suitable for large-scale popularization in the field.
In summary, the present invention provides a composition, which comprises the following raw materials: a dispersant and a carbon material; the carbon material is selected from: any one or more of expanded graphite, flake graphite, crystalline graphite, cryptocrystalline graphite, carbon fiber, pyrolytic carbon, foam graphite, and ketjen black. The invention provides a preparation method of the composition, and application of the composition or a product obtained by the preparation method in conductive paste. According to the technical scheme provided by the invention, the aqueous graphene conductive slurry is directly prepared by a physical stripping method, so that the preparation cost and time are effectively saved, and simultaneously, the graphene can be uniformly and stably dispersed in the solvent; further, through detection, compared with a commercially available reference product, the product prepared by the technical scheme provided by the invention has good conductivity, corrosion resistance and water resistance, and has better adhesive force with a base material. The composition, the preparation method and the application of the composition in the conductive paste solve the technical defects that in the prior art, the graphite emulsion in the battery is difficult to give consideration to good conductivity, corrosion resistance, adhesive force and small pollution.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. A composition, characterized in that the raw materials of the composition comprise: a dispersant and a carbon material;
the carbon material is selected from: any one or more of expanded graphite, flake graphite, crystalline graphite, cryptocrystalline graphite, carbon fiber, pyrolytic carbon, foam graphite, and ketjen black.
2. The composition according to claim 1, wherein the composition comprises the following raw materials in parts by mass: 15-30 parts of dispersing agent and 5-10 parts of carbon material.
3. Composition according to claim 1 or 2, characterized in that the dispersant is chosen from: any one or more of an anionic wetting dispersant, a cationic wetting dispersant and a non-ionic wetting dispersant.
4. The composition according to claim 3, wherein the anionic wetting dispersant is selected from the group consisting of: any one or more of carboxylate dispersant, sulfate dispersant, phosphate dispersant and sulfonate dispersant.
5. The composition according to claim 3, characterized in that the cationic wetting and dispersing agent is chosen from: any one or more of amine salt dispersant, quaternary ammonium salt dispersant and pyridinium salt dispersant.
6. The composition according to claim 3, wherein the non-ionic wetting dispersant is selected from the group consisting of: any one or more of glycol dispersants, polyhydric alcohol dispersants and cellulose dispersants.
7. The composition of claim 1, wherein the raw materials of the composition further comprise: an auxiliary agent;
the auxiliary agent is selected from: any one or more of an emulsifier, a defoaming agent, a wetting agent, a curing agent, a film forming agent, a leveling agent and a rheological agent.
8. A process for the preparation of a composition comprising any one of claims 1 to 7, wherein the process comprises: dispersing after dissolving the dispersant in deionized water, mixing with carbon material and shearing to obtain the product.
9. The production method according to claim 8, characterized by further comprising: any one or more of homogenization, ball milling, sanding and ultrasonic dispersion;
the homogenizing, ball milling, sanding and ultrasonic dispersing are carried out after the shearing step.
10. Use of a composition according to any one of claims 1 to 7 or a product obtained by the preparation method according to any one of claims 8 to 9 in an electroconductive paste.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114789998A (en) * | 2021-11-01 | 2022-07-26 | 广东一纳科技有限公司 | Negative electrode material, preparation method thereof and battery |
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| CN109928386A (en) * | 2017-12-18 | 2019-06-25 | 深圳先进技术研究院 | A kind of graphene aqueous dispersions and preparation method thereof |
| CN110564233A (en) * | 2019-06-17 | 2019-12-13 | 山东欧铂新材料有限公司 | Water-based graphene conductive coating and preparation method thereof |
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