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High-toughness high-conductivity carbon paper material for proton exchange membrane battery

A carbon technology for proton exchange membranes and batteries, applied in fuel cells, battery electrodes, circuits, etc., can solve problems such as poor electrical conductivity and uneven pore size distribution, and achieve improved mechanical properties, increased bonding, and increased active functional groups. Effect

Inactive Publication Date: 2020-05-08
梁十根
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0017] The technical problem to be solved by the present invention: Aiming at the problems of poor electrical conductivity and uneven pore size distribution of existing carbon paper, a carbon paper material for proton exchange membrane batteries with strong toughness and high conductivity is provided

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] In terms of parts by weight, weigh 45 parts of deionized water, 10 parts of 25% sulfuric acid by mass fraction and 1 part of potassium permanganate in a beaker, stir and mix to obtain the soaking solution, then take carbon paper and cut it out, according to the mass ratio 1:10, soak the cut carbon paper in the soaking solution for 20 minutes, then heat it in a water bath at 75°C for 2 hours, let it cool down to room temperature, filter and collect the soaked carbon paper, and rinse with deionized water After the washing solution becomes neutral, vacuum-dry at 45°C for 1 hour to obtain modified carbon paper; mix 1,3-dioxolane and xylene at a mass ratio of 1:1 and let stand for 6 hours to obtain Dissolve the solvent, then add polydimethylsiloxane to the dissolving solvent at a mass ratio of 1:20, stir to dissolve and ultrasonically disperse to collect the dispersed solution, and add modified carbon paper to the dispersed solution at a mass ratio of 1:15. In the dissolving...

Embodiment 2

[0038] In terms of parts by weight, weigh 47 parts of deionized water, 12 parts of 25% sulfuric acid by mass fraction and 1 part of potassium permanganate in a beaker, stir and mix to obtain the soaking solution, then take carbon paper and cut it out, according to the mass ratio 1:10, soak the cut carbon paper in the soaking solution for 25 minutes, then heat it in a water bath at 80°C for 2 hours, let it cool down to room temperature, filter and collect the soaked carbon paper, and rinse with deionized water After the washing solution becomes neutral, vacuum-dry at 47°C for 1 hour to obtain modified carbon paper; mix 1,3-dioxolane and xylene at a mass ratio of 1:1 and let stand for 7 hours to obtain Dissolve the solvent, then add polydimethylsiloxane to the dissolving solvent at a mass ratio of 1:20, stir to dissolve and ultrasonically disperse to collect the dispersed solution, and add modified carbon paper to the dispersed solution at a mass ratio of 1:15. In the solution, ...

Embodiment 3

[0040] In terms of parts by weight, weigh 50 parts of deionized water, 15 parts of 25% sulfuric acid by mass fraction and 2 parts of potassium permanganate in a beaker, stir and mix to obtain the soaking solution, then take carbon paper and cut it out, according to the mass ratio 1:10, soak the cut carbon paper in the soaking solution for 30 minutes, then heat it in a water bath at 85°C for 3 hours, let it cool down to room temperature, filter and collect the soaked carbon paper, and rinse with deionized water After the washing solution becomes neutral, vacuum-dry at 50°C for 2 hours to obtain modified carbon paper; mix 1,3-dioxolane and xylene at a mass ratio of 1:1 and let stand for 8 hours to obtain Dissolve the solvent, then add polydimethylsiloxane to the dissolving solvent at a mass ratio of 1:20, stir to dissolve and ultrasonically disperse to collect the dispersed solution, and add modified carbon paper to the dispersed solution at a mass ratio of 1:15. In the dissolvi...

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Abstract

The invention relates to a high-toughness high-conductivity carbon paper material for a proton exchange membrane battery, and belongs to the technical field of carbon paper materials. By utilizing a constant-temperature liquid-phase oxidation-reduction reaction between potassium permanganate and concentrated sulfuric acid, a nano manganese dioxide material is effectively loaded on the surface of the carbon paper material; meanwhile, polydimethylsiloxane is effectively coated on the surface of the polydimethylsiloxane, and the cross-linked polydimethylsiloxane is etched through hydrofluoric acid; the polydimethylsiloxane material is effectively etched, and holes are formed in the polydimethylsiloxane material, so that the conduction of the current material is ensured; meanwhile, the material structure is effectively coated and improved by the technical scheme; and a layer of ultrathin nano MnO<2> nano film is prepared on a carbon paper substrate by a chemical oxidation-reduction method,in this way, the specific surface area of the MnO<2> film electrode can be greatly increased, the capacity of double electric layers is increased, the electrochemical performance and power performance of the MnO<2> material are brought into full play, the utilization rate of the MnO<2> material is increased, meanwhile, the toughness and strength of the material are effectively modified through the coated and modified polydimethylsiloxane, and the mechanical property of the material is improved.

Description

technical field [0001] The invention relates to a strong toughness and high conductivity carbon paper material for a proton exchange membrane battery, belonging to the technical field of carbon paper materials. Background technique [0002] A fuel cell is a device that directly converts the chemical energy of hydrogen and oxygen into electrical energy through an electrode reaction. Compared with traditional energy sources, fuel cells do not involve combustion in the reaction process, so the energy conversion efficiency is not limited by the Carnot cycle, and has the remarkable characteristics of high efficiency and cleanliness. Proton exchange membrane fuel cell (PEMFC) not only has the general characteristics of fuel cells, but also has the characteristics of high energy conversion efficiency, environmental friendliness, high specific energy (compared to batteries), low operating temperature, and fast start-up. It can be widely used in automobiles, Power stations, mobile p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/1004H01M4/88
CPCH01M4/8807H01M8/1004H01M2008/1095Y02E60/50
Inventor 梁十根
Owner 梁十根
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