Composite conductive paper of carbon fiber

Abstract

The present invention discloses a composite conductive carbon fiber paper. Its preparation process includes the following steps: using acrylonitrile carbon fiber and other carbon material as raw material, adopting polyphenylamine, conventional polyvinyl alcohol and water-soluble phenolic resin and mixing them, and using their mixture as adhesive, the polyphenylamine is conductive high-molecular polymer; mixing sodium alginate and conventional dispersing agent; adopting wet-process paper-making technique to make paper; vacuum drying the obtained carbon paper, then using Teflon emulsion whose concentration is 5%-20% to make treatment; finally, introducing nitrogen gas and making carbonization, carbonization temperature is higher than 1000 deg.C, so as to obtain the invented composite conductive carbon fiber paper. Said composite conductive carbon fiber paper mainly is used in fuel cell field.

Description

technical field [0001] The invention relates to a composite conductive carbon fiber paper, in particular to a composite conductive carbon fiber paper containing a conductive adhesive and a novel dispersant and a preparation method thereof. Background technique [0002] At present, Shanghai has formulated a development plan of "100,000,000,000,000" fuel cell vehicles for the next five years. According to the "Hundred, Thousand, Ten Thousand" plan formulated by Shanghai, by the end of 2007, Shanghai will complete the necessary certification tests for the development and commercial demonstration of a new generation of fuel cell cars. Beginning in 2008, 100 fuel cell cars will be produced in small batches, and a demonstration fleet will be formed; before February 2008, the trial production of 100 fuel cell cars will be completed, and its models are expected to include Shanghai's own brand cars, Shanghai Volkswagen Passat, etc. In 2009, 1,000 fuel cell cars will be produced and ...

AI Technical Summary

Problems solved by technology

[0004] At present, in the conventional technology of carbon paper preparation, the dispersant is polyacrylamide. When beating in the beater, due to high-speed shearing, it is easy to lose the dispersion effect, thereby affecting the pore size and its distribution and porosity.

The commonly used binder is polyvinyl alcohol, which is non-conductive, because a small part of the binder will definitely remain in the carbon paper during carbonization, which will seriously reduce the conductivity of the carbon paper.