CN107134582B - High-activity electrode material and modification method thereof - Google Patents
High-activity electrode material and modification method thereof Download PDFInfo
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- CN107134582B CN107134582B CN201710411631.6A CN201710411631A CN107134582B CN 107134582 B CN107134582 B CN 107134582B CN 201710411631 A CN201710411631 A CN 201710411631A CN 107134582 B CN107134582 B CN 107134582B
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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
- H01M4/86—Inert electrodes with catalytic activity, e.g. for fuel cells
- H01M4/96—Carbon-based electrodes
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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
- H01M4/86—Inert electrodes with catalytic activity, e.g. for fuel cells
- H01M4/90—Selection of catalytic material
- H01M4/9075—Catalytic material supported on carriers, e.g. powder carriers
- H01M4/9083—Catalytic material supported on carriers, e.g. powder carriers on carbon or graphite
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/18—Regenerative fuel cells, e.g. redox flow batteries or secondary fuel cells
- H01M8/184—Regeneration by electrochemical means
- H01M8/188—Regeneration by electrochemical means by recharging of redox couples containing fluids; Redox flow type batteries
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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
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
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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
- 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
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Abstract
The invention provides a high-activity electrode material, which is applied to the field of electrode materials in electrochemical reaction and is prepared by the following steps of using a basic raw material, wherein the basic raw material is an organic fiber material, and the steps comprise carding the basic raw material, forming a pre-oxidized felt by needling, forming a carbon felt by high-temperature calcination and carbonization treatment and forming a graphite felt by high-temperature calcination and graphitization treatment; and (2) selecting one of the base raw materials from pre-oxidized felts formed by carding and needling, carbon felts formed by high-temperature calcination and carbonization and graphite felts formed by high-temperature calcination and graphitization, and performing activation treatment, wherein the activation treatment is physical van der Waals force adsorption or chemical grafting with chemical organic resin as a binder. The invention has the characteristics of high specific surface area, acid resistance and corrosion resistance, and the resin products are cheap and easily available materials and can be produced industrially in a large scale.
Description
Technical Field
The invention relates to the field of electrochemistry, in particular to surface modification and a modification method of an electrochemical reaction electrode material in the field of electrochemistry.
Background
An electrochemical cell is a chemical energy storage device that uses the mutual change between different valence states of ions, conducts electricity through electrons at the outside, and conducts electricity through protons or ions at the inside, thereby forming electric current. The electrode material used in the electrochemical field is generally an activated carbon material, the electrolyte used is generally divided into an organic electrolyte and an inorganic electrolyte, and both electrolytes generally have certain corrosivity, so that the electrode felt is required to have high corrosion resistance. Electrode materials are one of the most important components in the electrochemical field, because their physicochemical properties have a great influence on the current density, power density and service life of the electrochemical power source. In addition to good corrosion resistance, electrode materials are generally required to have good electrical conductivity and good electrochemical activity. The specific surface area of the electrode material has a large influence on the electrochemical activity of the electrode material.
Taking the all-vanadium redox flow battery as an example, the electrolyte of the all-vanadium redox flow battery is concentrated sulfuric acid which is extremely corrosive, so that the electrode of the all-vanadium redox flow battery has extremely high requirements on corrosion resistance. The graphite felt is mainly used as the electrode of the all-vanadium battery at present on a large scale. The graphite felt has the advantages of large specific surface area, corrosion resistance, low resistivity, low price, high mechanical strength and the like. The activity of the surface of the graphite felt can directly influence the overall battery performance of the all-vanadium redox flow battery, so that the development direction of the graphite felt is to modify the surface of the graphite felt and increase reaction active points, thereby comprehensively improving the electrochemical performance of the all-vanadium redox flow battery. The requirements on the electrode felt are high in the fields of seawater desalination and sewage treatment, and the surface modification of the electrode felt is of great significance.
At present, the method for modifying the surface of the graphite felt comprises the following steps: the gas phase oxidation method, the liquid phase oxidation method and the electrochemical oxidation method are several common surface treatment methods, other impurities are not introduced, the electrochemical activity of the electrode felt is improved, but the improvement is not much. As disclosed in patent No. 201510937646.7, graphite oxide is prepared in a laboratory, and then a graphite oxide solution and a graphite felt are mixed and heated in a reaction kettle, and the graphite oxide is reduced into graphene loaded on the surface of the graphite felt. The method is mainly a laboratory preparation method, a large amount of concentrated sulfuric acid, water, alcohol and other raw materials are needed in the preparation process, the prepared graphene is very rare, and can only be used as a laboratory sample for preparation, and the possibility of large-scale preparation and application is not provided. As also disclosed in patent No. 200910093955.5, the chemical vapor deposition method for depositing carbon nanotubes on the surface of graphite felt is complicated, requires various treatments of raw materials, and is expensive and not feasible for industrial operation.
Based on the defects of the electrode material prepared by the above modification in the prior art, therefore, the graphite felt surface modification has a promotion place.
Disclosure of Invention
Aiming at the defects, the invention aims to provide a high-activity electrode material and a modification method, wherein a simple modification operation is added in the necessary process of preparing the graphite felt, the modification method is simple, the modified raw materials are cheap and easy to obtain, and the high-activity electrode material has good industrial operability so as to solve the technical problems in the prior art.
In order to achieve the purpose, the invention adopts the following technical scheme:
a high-activity electrode material is applied to the field of electrode materials on electrochemical reaction and is prepared by processing basic raw materials, wherein the basic raw materials are organic fiber materials, and the steps comprise carding the basic raw materials, needling to form a pre-oxidized felt, carrying out high-temperature calcination carbonization treatment to form a carbon felt, and carrying out high-temperature calcination graphitization treatment to form a graphite felt; and (2) selecting one of the base raw materials from pre-oxidized felts formed by carding and needling, carbon felts formed by high-temperature calcination and carbonization and graphite felts formed by high-temperature calcination and graphitization, and performing activation treatment, wherein the activation treatment is physical van der Waals force adsorption or chemical grafting with chemical organic resin as a binder.
According to the high-activity electrode material of the preferred embodiment of the invention, the base material is one or more of polyacrylonitrile fiber, pitch fiber, viscose fiber, phenolic fiber and carbon fiber.
According to the highly active electrode material of the preferred embodiment of the present invention, the physical van der waals force adsorption is: dispersing a modified material in an aqueous solution to form an aqueous dispersion, immersing a fiber material in the aqueous dispersion, carrying out Van der Waals force loading through vacuumizing, printing or suction filtration treatment, and then drying, wherein the modified material is a high-activity carbon material, and the high-activity carbon material is one or more of graphite powder, graphene, nano carbon powder, activated carbon powder, carbon nano tubes, pyrolytic graphite, pyrolytic carbon and vapor deposition carbon.
According to the highly active electrode material of the preferred embodiment of the present invention, the chemical grafting of the chemical organic resin as the binder is: preparing a resin dispersion liquid by using a modified material and organic resin, immersing a fiber material into the resin dispersion liquid, and vacuumizing or suction-filtering, wherein the modified material is a high-activity carbon material, the high-activity carbon material is one or more of graphite powder, graphene, nano carbon powder, activated carbon powder, carbon nano tubes, pyrolytic graphite, pyrolytic carbon and vapor deposition carbon, and the organic resin is one or more of thermosetting resins such as epoxy resin, phenolic resin, polyacrylic acid and polyamide resin; after the graphite felt formed by high-temperature calcination and graphitization treatment is chemically grafted, carbonization treatment is needed to carbonize the binder.
According to the highly active electrode material of the preferred embodiment of the present invention, the aqueous dispersion of the highly active carbon material has a carbon material concentration of 0.001wt% to 20 wt%.
According to the highly active electrode material of the preferred embodiment of the present invention, the resin dispersion of the highly active carbon material has a carbon material concentration of 0.001wt% to 20 wt%.
According to the highly active electrode material of the preferred embodiment of the present invention, the mass of the solid impregnated into the fibers of the resin dispersion is less than 20% of the mass of the felt itself.
A method for modifying a high-activity electrode material by using organic fibers comprises the following steps:
step 1, finishing and carding the organic fiber raw material;
step 2: needling to form a pre-oxidized felt;
and step 3: carrying out high-temperature calcination carbonization treatment to form a carbon felt;
and 4, step 4: carrying out high-temperature calcination graphitization treatment to form a graphite felt;
one of the steps is selected to carry out activation treatment, and the activation treatment is physical van der Waals force adsorption or chemical grafting of chemical organic resin serving as a binding agent.
According to the modification method of the preferred embodiment of the present invention, when the step 4 of chemical grafting of the chemical organic resin as the binder is selected, the method further comprises a step 4-1 of carbonizing the binder.
According to the modification method of the preferred embodiment of the present invention, the physical van der waals adsorption is: dispersing a modified material in an aqueous solution to form an aqueous dispersion, immersing a fiber material in the aqueous dispersion, carrying out Van der Waals force loading by vacuuming, printing or suction filtration, and then drying; the chemical grafting of the chemical organic resin as a binder is as follows: preparing a resin dispersion liquid from a modified material and organic resin, immersing a fiber material into the resin dispersion liquid, and vacuumizing or suction-filtering.
The design idea of the application is to provide a method for increasing the surface activity of the graphite felt, wherein in each process of industrially manufacturing the graphite felt, in the four stages of carding, needling, carbon felt and graphite felt, treatment is selected, and the treatment mode is to load other materials on the surface of the graphite felt by a physical or chemical method so as to obtain the modified graphite felt. In addition, the graphite felt is made into the graphite felt with directional activity gradient, so that the effect of polarization prevention is achieved. The electrochemical properties of the graphite felt are integrally improved, and great advantages are provided for the graphite felt as an electrode material for batteries, industrial electrolysis and smelting.
Compared with the prior art, the invention has the following advantages and positive effects due to the adoption of the technology:
firstly, the activated carbon material, the organic resin and the water are used as a load material and a solvent, so that other element impurities are prevented from being mixed in the graphite felt treatment process;
secondly, the activated carbon material has the characteristics of high specific surface area, acid resistance and corrosion resistance, and the resin product is also a cheap and easily-obtained material;
thirdly, the treatment process is carried out in four stages of carding, pre-oxidizing felt, carbon felt and graphite felt, and complex reaction equipment and treatment modes are not used, so that large-scale industrial production can be realized;
fourthly, the activated carbon material is loaded on the graphite felt in a simpler mode, so that the electrochemical reaction activity of the graphite felt can be obviously increased, the chemical activity is high, and higher power can be obtained under the condition of the same current density or higher current density can be obtained under the condition of the same power.
Drawings
FIG. 1 is a schematic view of a vacuum process;
FIG. 2 is a schematic diagram of the suction filtration process;
FIG. 3 is a schematic view of roll coating.
Detailed Description
Several preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, but the present invention is not limited to only these embodiments. The invention is intended to cover alternatives, modifications, equivalents, and alternatives that may be included within the spirit and scope of the invention. In the following description of the preferred embodiments of the present invention, specific details are set forth in order to provide a thorough understanding of the present invention, and it will be apparent to those skilled in the art that the present invention may be practiced without these specific details.
The application provides a high-activity electrode material which is applied to the field of electrode materials on electrochemical reaction and is prepared by a series of processing steps of basic raw materials, wherein the processing steps comprise carding the basic raw materials, needling to form a pre-oxidized felt, carrying out high-temperature calcination carbonization treatment to form a carbon felt and carrying out high-temperature calcination graphitization treatment to form a graphite felt; one step is selected to carry out activation treatment in the steps of carding the basic raw materials, needling to form a pre-oxidized felt, calcining at high temperature for carbonization to form a carbon felt and calcining at high temperature for graphitization to form a graphite felt, the activation treatment is physical van der Waals force adsorption or chemical grafting with chemical organic resin as a binder, and complicated reaction equipment and treatment modes are not used, so that large-scale industrial production can be realized.
In the processing and manufacturing process, the base raw material is composed of one or more organic fiber materials of polyacrylonitrile fibers, pitch fibers, viscose fibers and phenolic fibers.
The physical method, which is the adsorption of van der waals forces, is as follows: dispersing a modified material in an aqueous solution to form an aqueous dispersion, immersing a fiber material in the aqueous dispersion, carrying out Van der Waals force loading through vacuumizing, printing or suction filtration treatment, and then drying, wherein the modified material is a high-activity carbon material, the high-activity carbon material is one or more of graphite powder, graphene, nano carbon powder, activated carbon powder, carbon nano tubes, pyrolytic graphite, pyrolytic carbon and vapor deposition carbon, and the carbon material concentration of the aqueous dispersion of the high-activity carbon material is 0.001-20 wt%.
The following chemical methods are described, the chemical grafting of the chemical organic resin as a binder is: preparing a resin dispersion liquid by a modified material and organic resin, immersing a fiber material into the resin dispersion liquid, and performing vacuum pumping or suction filtration treatment, wherein the modified material is a high-activity carbon material, the high-activity carbon material is one or more of graphite powder, graphene, nano carbon powder, active carbon powder, carbon nano tubes, pyrolytic graphite, pyrolytic carbon and vapor deposition carbon, and the organic resin is one or more of thermosetting resins such as epoxy resin, phenolic resin, polyacrylic acid and polyamide resin; if the high-temperature calcination graphitization treatment is selected to form the graphite felt for chemical grafting, carbonization treatment is needed after the chemical grafting to carbonize the binder. The resin dispersion liquid of the high-activity carbon material has a carbon material concentration of 0.001wt% to 20 wt%. In addition, the mass of the solids impregnated into the fibers of the resin dispersion is less than 20% of the mass of the mat itself.
The application also refers to a method for modifying the high-activity electrode material by using the organic fiber, which comprises the following steps:
step 1, finishing and carding the organic fiber raw material;
step 2: needling to form a pre-oxidized felt;
and step 3: carrying out high-temperature calcination carbonization treatment to form a carbon felt;
and 4, step 4: carrying out high-temperature calcination graphitization treatment to form a graphite felt;
in the above steps, one of the steps is selected to perform activation treatment, and the activation treatment is physical van der waals force adsorption or chemical grafting of chemical organic resin as a binder. If physical van der Waals adsorption is selected for the treatment, the van der Waals loading is carried out by vacuuming, printing or suction filtration, and then only drying treatment is needed; if the organic resin which is chemically grafted in the step 4 is selected as the binder, the carbonization treatment in the step 4-1 is needed after the chemical grafting is carried out, so that the binder is carbonized.
In addition, when chemical grafting of a chemical organic resin as a binder is carried out, the organic resin binder used has a solid content of less than 30% of the total mass of the solution.
From the above, it can be known that the present application is to modify and reprocess the formed organic fiber material to graphite felt in the carding stage, pre-oxidation felt stage, carbon felt stage and graphite felt stage, so the following examples only illustrate these four steps.
Example one
After the graphite felt is formed, it is treated using a phenolic resin as a binder.
Preparing dispersion liquid, putting 1-200g of water-soluble phenolic resin and 1-100g of activated carbon into 1L of deionized water, and stirring for 1-3 hours. A resin dispersion is formed in which both the phenolic resin and the activated carbon have a concentration gradient. Cutting the graphite felt into regular squares, cutting the side length according to actual requirements, wherein the side length is cut into 50 x 50mm2M0 was weighed.
As shown in fig. 1, the activated carbon resin dispersion is poured into a container having high sealability, and a graphite felt 10 is put into the dispersion 20 and then sealed with a sealing cap.
And (3) vacuumizing the container by using a vacuum pump, wherein the treatment time is 1-3 hours.
Taking out the treated graphite felt, and drying at 150 ℃ for 2-5 hours.
The dried graphite felt is treated in a vacuum or inert gas furnace at the temperature of 700-900 ℃, and the treatment time is 1-10 hours. After cooling, M1 was weighed.
And M is M0-M1, which is the mass of the external carbon.
The present invention relates to a method for manufacturing a modified graphite felt, which is characterized in that organic resin is used as a binder, other active carbon materials are used as modified materials, and the organic resin is carbonized in a high-temperature oxygen-free environment. The modified graphite felt is not mixed with other element impurities, and the activated carbon material is introduced, so that the electrochemical performance of the graphite felt can be well improved.
Example two
In the carbon felt stage, physical methods are used for treatment.
Preparing water dispersion, putting 1-100g of activated carbon into 1L of deionized water, and stirring for 1-3 hours on a stirrer to form stable and uniform water dispersion.
The graphite felt is cut into regular squares, the side length is cut according to actual requirements, the regular squares are cut into 50 x 50mm2, and M0 is weighed.
As shown in FIG. 2, the filter paper was placed in a Buchner funnel 40, the carbon felt 11 was placed on the filter paper, and the aqueous activated carbon dispersion 50 was poured into the Buchner funnel in an amount of 100 ml.
Suction filtration was performed using a vacuum pump until the liquid in the buchner funnel was completely drained.
The treated carbon felt 11 is graphitized at 1500-3000 ℃ under vacuum or inert gas environment.
EXAMPLE III
In the carding stage, the treatment is carried out by physical methods.
Preparing water dispersion, putting 1-100g of activated carbon into 1L of deionized water, and stirring for 1-3 hours on a stirrer to form stable and uniform water dispersion.
Taking a certain amount of basic raw materials, putting the basic raw materials into an opener for treatment, and slowly adding the activated carbon water dispersion liquid obtained in the step in the treatment process. The mass ratio of the base material to the active carbohydrate dispersion is controlled to be 10:1-1: 1.
The modified graphite felt is obtained by needling, carbonizing and graphitizing the treated fiber material.
Example four
In the needling stage, the treatment is carried out using epoxy as a binder.
Preparing dispersion liquid 60, putting 1-200g of water-soluble phenolic resin and 1-100g of activated carbon into 1L of deionized water, and stirring for 1-3 hours. A resin dispersion is formed in which both the phenolic resin and the activated carbon have a concentration gradient. As shown in fig. 3, the resin dispersion was poured into a simple funnel 70 and allowed to flow down slowly.
The resin dispersion is brushed onto the surface of the fiber mat 12 using a roller prior to the needling step of the fiber mat 12.
And then carrying out pre-oxidation felt carbonization and graphitization to obtain the modified graphite felt.
Compared with the prior art, the invention has the following advantages and positive effects due to the adoption of the technology:
firstly, the activated carbon material, the organic resin and the water are used as a load material and a solvent, so that other element impurities are prevented from being mixed in the graphite felt treatment process;
secondly, the activated carbon material has the characteristics of high specific surface area, acid resistance and corrosion resistance, and the resin product is also a cheap and easily-obtained material;
thirdly, the treatment process is carried out in four stages of carding, pre-oxidizing felt, carbon felt and graphite felt, and complex reaction equipment and treatment modes are not used, so that large-scale industrial production can be realized;
fourthly, the activated carbon material is loaded on the graphite felt in a simpler mode, so that the electrochemical reaction activity of the graphite felt can be obviously increased, the chemical activity is high, and higher power can be obtained under the condition of the same current density or higher current density can be obtained under the condition of the same power. .
While embodiments in accordance with the invention have been described above, these embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments described. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention and various embodiments with various modifications as are suited to the particular use contemplated. The invention is limited only by the claims and their full scope and equivalents.
Claims (4)
1. A high-activity electrode material is applied to the field of electrode materials on electrochemical reaction and is characterized in that the high-activity electrode material is prepared by processing basic raw materials, wherein the basic raw materials are one or more of polyacrylonitrile fibers, pitch fibers, viscose fibers, phenolic fibers and carbon fibers, the processing steps comprise carding the basic raw materials, needling the basic raw materials to form a pre-oxidized felt, calcining and carbonizing the basic raw materials at high temperature to form a carbon felt and calcining and graphitizing the carbon felt at high temperature to form a graphite felt, one of the steps of carding the basic raw materials, needling the basic raw materials to form the pre-oxidized felt and calcining and carbonizing the basic raw materials at high temperature to form the carbon felt is selected for activation treatment,
the activation treatment is physical van der waals adsorption which is: dispersing a modified material in an aqueous solution to form an aqueous dispersion, immersing a fiber material in the aqueous dispersion, carrying out Van der Waals force loading by vacuuming, printing or suction filtration, and then drying;
or, the activation treatment is chemical grafting of the fiber surface, and the chemical grafting is as follows: preparing a resin dispersion liquid from a modified material and organic resin, immersing a fiber material into the resin dispersion liquid, and vacuumizing or suction-filtering;
the modified material is a high-activity carbon material, the high-activity carbon material is one or more of graphite powder, graphene, nano carbon powder, activated carbon powder, carbon nano tubes, pyrolytic graphite, pyrolytic carbon and vapor deposition carbon, and the organic resin is one or more of epoxy resin, phenolic resin, polyacrylic acid and polyamide resin.
2. The highly active electrode material according to claim 1, wherein the resin dispersion liquid of the highly active carbon material has a carbon material concentration of 0.001wt% to 20 wt%.
3. The highly active electrode material according to claim 1, wherein the mass of the solid in which the resin dispersion is impregnated into the fibers is less than 20% of the mass of the felt itself.
4. A method for modifying a highly active electrode material, comprising:
step 1, finishing and carding the organic fiber raw material;
step 2: needling to form a pre-oxidized felt;
and step 3: carrying out high-temperature calcination carbonization treatment to form a carbon felt;
and 4, step 4: carrying out high-temperature calcination graphitization treatment to form a graphite felt;
selecting one of the steps 1 to 3 to carry out activation treatment,
the organic fiber raw material is one or more of polyacrylonitrile fiber, pitch fiber, viscose fiber, phenolic fiber and carbon fiber;
the activation treatment is physical van der waals adsorption which is: dispersing a modified material in an aqueous solution to form an aqueous dispersion, immersing a fiber material in the aqueous dispersion, carrying out Van der Waals force loading by vacuuming, printing or suction filtration, and then drying;
or, the activation treatment is chemical grafting of the fiber surface, and the chemical grafting is as follows: preparing a resin dispersion liquid from a modified material and organic resin, immersing a fiber material into the resin dispersion liquid, and vacuumizing or suction-filtering;
the modified material is a high-activity carbon material, the high-activity carbon material is one or more of graphite powder, graphene, nano carbon powder, activated carbon powder, carbon nano tubes, pyrolytic graphite, pyrolytic carbon and vapor deposition carbon, and the organic resin is one or more of epoxy resin, phenolic resin, polyacrylic acid and polyamide resin.
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| CN109671957A (en) * | 2017-10-13 | 2019-04-23 | 中国科学院大连化学物理研究所 | A kind of electrode material for all-vanadium flow battery and its preparation and application |
| CN109671953A (en) * | 2017-10-13 | 2019-04-23 | 中国科学院大连化学物理研究所 | A kind of electrode material for all-vanadium flow battery and its preparation and application |
| CN109841850A (en) * | 2017-11-27 | 2019-06-04 | 中国科学院大连化学物理研究所 | A kind of positive electrode used for all-vanadium redox flow battery and its preparation and application |
| CN109841851A (en) * | 2017-11-27 | 2019-06-04 | 中国科学院大连化学物理研究所 | A kind of electrode material for all-vanadium flow battery and its preparation and application |
| CN108878915B (en) * | 2018-08-30 | 2021-01-26 | 成都先进金属材料产业技术研究院有限公司 | Porous carbon material for covering carbon nanotube layer for vanadium battery and vanadium battery |
| CN110474052B (en) * | 2019-07-29 | 2022-09-02 | 湖南文理学院 | Lithium ion battery electrode material and preparation method thereof |
| CN110642244A (en) * | 2019-10-08 | 2020-01-03 | 杭州高烯科技有限公司 | Preparation method of graphene and graphene oxide |
| CN112002910B (en) * | 2020-09-11 | 2021-08-10 | 杭州德海艾科能源科技有限公司 | Vanadium battery composite electrode and preparation method thereof |
| CN113235307B (en) * | 2021-04-26 | 2023-02-17 | 因达孚先进材料(苏州)有限公司 | Hard heat-preservation viscose-based graphite felt and preparation method thereof |
| CN114541137B (en) * | 2022-03-08 | 2024-07-19 | 辽宁兴汇碳材料科技有限公司 | Silica sol composite graphite felt and preparation method and application thereof |
| CN115559110B (en) * | 2022-12-02 | 2023-04-07 | 杭州德海艾科能源科技有限公司 | Carbon nano composite material modified graphite felt for vanadium battery and preparation method thereof |
| CN117174923B (en) * | 2023-11-03 | 2024-02-06 | 杭州德海艾科能源科技有限公司 | Graphite felt for enhancing solid-liquid interface interaction and preparation method thereof |
| CN117810466B (en) * | 2023-12-25 | 2024-07-12 | 辽宁奥亿达新材料股份有限公司 | Preparation method of vanadium battery graphite felt |
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