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A modified carbon carrier, its preparation method and its application in fuel cells

A modified carbon and carbon carrier technology, which is applied in battery electrodes, circuits, electrical components, etc., can solve the problems of platinum particle agglomeration and shedding, and reduce the utilization rate of platinum, so as to prevent agglomeration and shedding, reduce hydrophobicity, and improve resistance corrosive effect

Active Publication Date: 2021-07-02
FAW JIEFANG AUTOMOTIVE CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The method can effectively reduce the acid damage to the carbon support during the dealloying process by coating the polyaniline on the support, but in the process of using the catalyst, the agglomeration and shedding of platinum particles are prone to occur, thereby reducing the utilization rate of platinum.

Method used

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  • A modified carbon carrier, its preparation method and its application in fuel cells
  • A modified carbon carrier, its preparation method and its application in fuel cells
  • A modified carbon carrier, its preparation method and its application in fuel cells

Examples

Experimental program
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Effect test

Embodiment 1

[0075] (1) Add 51 mg of sodium lauryl sulfate into 50 g of deionized water, mix and stir evenly, and make an aqueous dispersant solution;

[0076] (2) Measure 0.2512 g of the dispersant aqueous solution, add 0.3023 g of mesoporous carbon into it, and ultrasonically uniformly obtain solution A;

[0077] (3) Dissolve 0.2mL of 60wt% polytetrafluoroethylene resin dispersion (Daijin Fluorochemical Co., Ltd., D50 particle size is about 30nm) in 6.8mL of deionized water, mix and stir for 10min to make a mass concentration of 1.8% high polymer aqueous dispersion; add 0.0069g sulfonate type anionic fluorosurfactant (Xuejia Fluoro Silicon Chemical Co., Ltd., Actyflon-S100) into the high polymer aqueous dispersion, mix and stir for 10min, and make high The polymer aqueous solution is solution B, and the mass concentration of the sulfonate type anionic fluorosurfactant in the solution B is 0.1%;

[0078] (4) Add solution A of step (2) to solution B of step (3), and mix and stir for 30 minu...

Embodiment 2

[0082] (1) Add 25 mg of polyvinylpyrrolidone and 16 mg of sodium isooctyl polyoxyethylene ether phosphate into 50 g of deionized water, mix and stir evenly, and make an aqueous dispersant solution;

[0083] (2) Measure 0.3813g of dispersant aqueous solution, add 0.2567g graphite, 0.1003g graphene in it, ultrasonic evenly, obtain solution A;

[0084] (3) Dissolve 0.2mL of 60wt% polytetrafluoroethylene resin dispersion (Daijin Fluorochemical Co., Ltd., D50 particle size is about 50nm) in 5.8mL deionized water, mix and stir for 20min, and make the mass concentration 2.1% high polymer aqueous dispersion; add 0.0612g sulfonate type anionic fluorosurfactant (Xuejia Fluoro Silicon Chemical Co., Ltd., Actyflon-S100) into the high polymer aqueous dispersion, mix and stir for 20min, and make high The polymer aqueous solution is solution B, and the mass concentration of the sulfonate type anionic fluorosurfactant in the solution B is 1.0%;

[0085] (4) Add solution A of step (2) to solu...

Embodiment 3

[0089] (1) Add 21 mg of polyoxyethylene-polyoxypropylene-polyoxyethylene block copolymer and 14 mg of cetyltrimethylammonium bromide to 50 g of deionized water, mix and stir evenly, and make an aqueous dispersant solution;

[0090] (2) Measure 0.6008g of aqueous dispersant solution, add 0.3567g of carbon black and 0.1935g of carbon fiber into it, mix and stir evenly to obtain solution A;

[0091] (3) Dissolve 1mL of 60wt% polytetrafluoroethylene resin dispersion (Daijin Fluorine Chemical Co., Ltd., D50 particle size is about 70nm) in 11mL of deionized water, mix and stir for 60min, and make a high concentration of 5.0%. Polymer aqueous dispersion; add 0.2409g of diol-type fluorosurfactant (Dajin Fluorine Chemical Co., Ltd., PEG20000) into the high polymer aqueous dispersion, mix and stir for 60min, and make a high polymer aqueous solution, which is solution B , the mass concentration of the diol-type fluorosurfactant in the solution B is 2.0%;

[0092] (4) Add solution A of s...

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Abstract

The invention relates to a modified carbon carrier, its preparation method and its application in fuel cells. The method comprises the following steps: (1) mixing a carbon carrier with an aqueous solution of a dispersant to obtain a solution A; (2) mixing a fluorine-containing surfactant with an aqueous dispersion of a high polymer to obtain a solution B; (3) mixing the The solution A is mixed with the solution B, and a solid product is obtained by separation, and the solid product is calcined to obtain a preliminary modified carbon support; (4) the preliminary modified carbon support is mixed with an aqueous oxidant solution to obtain a modified carbon support . The modified carbon carrier of the present invention can not only shorten the path for the reaction gas to contact the noble metal particles, reduce the transmission resistance of the reaction gas, but also effectively prevent the agglomeration and falling off of the platinum particles, and significantly improve the utilization rate of the noble metal particles.

Description

technical field [0001] The invention belongs to the technical field of fuel cells, and in particular relates to a modified carbon carrier, its preparation method and its application in fuel cells. Background technique [0002] Fuel cell is an excellent energy conversion device. As long as there is a continuous supply of fuel, it can always generate electricity. Compared with internal combustion engines, fuel cells are not limited by the Carnot cycle, and the energy conversion efficiency is greatly improved. Moreover, fuel cells The cathode reactant is oxygen in the air, which has a wide range of sources, and the whole process only produces electricity, heat and water, without producing greenhouse gases and any pollution. To sum up the advantages mentioned above, fuel cells, as an important part in the field of renewable new energy, have attracted widespread attention from all walks of life. [0003] Although the fuel cell concept is thermodynamically feasible, its correspon...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/88H01M4/92
CPCH01M4/8803H01M4/926Y02E60/50
Inventor 朱雅男于力娜张克金唐柳朱云杨帅
Owner FAW JIEFANG AUTOMOTIVE CO
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