A kind of preparation method of catalytic carbon paper

A technology of catalytic carbon and carbon paper, which is applied in the direction of solid electrolyte fuel cells, structural parts, electrical components, etc., can solve the problem of merging the catalytic layer and diffusion layer of fuel cells, and achieve the improvement of free carrier density and oxygen reduction catalysis Good activity and widening effect

Inactive Publication Date: 2019-02-12
CENT SOUTH UNIV
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Problems solved by technology

[0004] But so far, there is no report on merging the fuel cell catalyst layer and diffusion layer in the form of doping

Method used

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  • A kind of preparation method of catalytic carbon paper
  • A kind of preparation method of catalytic carbon paper

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Using natural phosphorus flake graphite as raw material, concentrated sulfuric acid, sodium nitrate, and potassium permanganate as oxidant, prepare graphite oxide solution by Hummers method, put the prepared graphene oxide solution into alcohol for ultrasonic treatment for 2 hours, and then put it into electrolysis In the tank, fiber carbon paper treated at a high temperature of 2800°C was used as the working electrode. After a DC voltage of -1.8V was applied for 2 hours, the graphene oxide was reduced to graphene, and the graphene was coated on the carbon paper; the prepared carbon paper Place in vacuum drying at 50°C for 24 hours; the carbon paper obtained above is doped with nitrogen and sulfur under the gas deposition method with nitrogen source and sulfur source gas, at 800°C, catalyzed after 2 hours Carbon paper, in which the volume ratio of ammonia gas to hydrogen sulfide gas is 1:2. The obtained catalytic carbon paper has good oxygen reduction catalytic activity...

Embodiment 2

[0022] Using natural phosphorus flake graphite as raw material, concentrated sulfuric acid, sodium nitrate, and potassium permanganate as oxidant, prepare graphite oxide solution by Hummers method, put the prepared graphene oxide solution into alcohol for ultrasonic treatment for 2 hours, and then put it into electrolysis In the tank, fiber carbon paper treated at a high temperature of 2500°C was used as the working electrode. After a DC voltage of -1.75V was applied for 3 hours, the graphene oxide was reduced to graphene, and the graphene was coated on the carbon paper; the prepared carbon paper Place in vacuum drying at 50°C for 24 hours; the carbon paper obtained above is doped with nitrogen and sulfur under the gas deposition method with nitrogen source and sulfur source gas, and catalyzed at 700°C after 2 hours. Carbon paper, in which the volume ratio of ammonia gas to hydrogen sulfide gas is 1:1. The obtained catalytic carbon paper has good catalytic activity for oxygen ...

Embodiment 3

[0024] Using natural phosphorus flake graphite as raw material, concentrated sulfuric acid, sodium nitrate, and potassium permanganate as oxidants, the Hummers method is used to prepare graphite oxide solution, and the prepared graphene oxide solution is put into alcohol for ultrasonic treatment for 2.5 hours, and then placed in electrolysis In the tank, fiber carbon paper treated at a high temperature of 2480°C was used as the working electrode. After a DC voltage of -1.7V was applied for 2.5 hours, the graphene oxide was reduced to graphene, and the graphene was coated on the carbon paper; the prepared carbon paper Place in vacuum drying at 60°C for 26 hours; use the carbon paper obtained above to dope the carbon paper with nitrogen and sulfur under the gas deposition method with nitrogen source and sulfur source gas, and obtain catalytic Carbon paper, in which the volume ratio of ammonia gas to hydrogen sulfide gas is 1:1. The obtained catalytic carbon paper has good cataly...

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Abstract

The invention provides a preparation method of catalytic carbon paper and belongs to the field of fuel cell catalytic materials and diffusion layers. According to the preparation method, a graphene oxide solution is placed into an electrolytic bath, the carbon paper serves as a work electrode, a direction current voltage ranging from -2.0V to -1.7 V is introduced, after 0.5-8 hours pass, graphene oxide is reduced into grapheme, the carbon paper is wrapped with the grapheme, and after drying is conducted, the catalytic carbon paper is prepared through a gas deposition method. The catalytic carbon paper prepared from the method has performance of original carbon paper of a diffusion layer, and oxygen reduction catalytic activity and good wear resistance and corrosion properties are given to the carbon paper.

Description

technical field [0001] The invention patent belongs to the field of fuel cell carbon paper and catalytic materials. Background technique [0002] Fuel cell power generation is the fourth type of power generation technology after hydropower, thermal power, and nuclear power generation. It is a kind of chemical energy stored in fuel and oxidant directly in the form of electrochemical reaction under isothermal conditions without burning. %-70%) and an environment-friendly power generation device converted into electrical energy. As a kind of high energy density, high energy conversion rate, and environment-friendly power supply device, various fuel cells (Fuel Cell) have received extensive attention all over the world. The diffusion layer (the main component is carbon paper) of the fuel cell is a key component in the (PEMFC) proton exchange membrane fuel cell, which plays multiple functions and has an important impact on the structure and performance of the fuel cell. The mec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/88H01M4/96H01M8/10
CPCH01M4/8807H01M4/8853H01M4/96Y02E60/50
Inventor 粱伊丽伍小波谢志勇黄启忠李宏斌杨飘飘孙敏刘艳李向辉
Owner CENT SOUTH UNIV
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