Fuel battery membrane electrode and preparation method thereof

Abstract

The invention relates to a membrane electrode of a fuel battery, comprising a proton exchange membrane and electrodes which are respectively arranged on the two surfaces of the proton exchange membrane, and the electrode is composed of a gas diffusion layer and a catalysis layer; wherein, the gas diffusion layer comprises a carbon nano tube membrane structure which at least comprises a carbon nano tube layer, and the carbon nano tubes in the carbon nano tube layer are preferential arrayed along the same direction. The invention relates to a preparation method of the membrane electrode of the fuel battery, comprising the following steps: a carbon nano tube array is provided, and at least one carbon nano tube membrane is obtained from the carbon nano tube array, and the gas diffusion layer is prepared by adopting the carbon nano tube membrane, and the catalysis layer is formed on the surface of the gas diffusion layer, thus obtaining the electrode; the proton exchange membrane is provided, and the electrodes are respectively arranged on the two surfaces of the proton exchange membrane, thus obtaining the membrane electrode of the fuel battery.

Description

technical field [0001] The invention relates to a fuel cell membrane electrode and a preparation method thereof, in particular to a carbon nanotube-based fuel cell membrane electrode and a preparation method thereof. Background technique [0002] A fuel cell is an electrochemical power generation device that converts fuel and oxidant gases into electrical energy and produces reaction products. Compared with other battery systems such as alkaline batteries and lithium batteries, fuel cells have the advantages of high energy conversion efficiency, low environmental pollution, wide application range, no noise, and continuous operation. They are widely used in military, national defense and civilian power, automotive, communications and other fields. [0003] Fuel cells can generally be divided into alkaline fuel cells, solid oxide fuel cells, and proton exchange membrane fuel cells (see, Recent advances in fuel cell technology and its application, Journal of Power Sources, V10...

AI Technical Summary

Problems solved by technology

On the one hand, in traditional carbon fiber paper, the distribution of carbon fibers is uneven, resulting in unreasonable pore structure and small specific surface area in carbon fiber paper.

This structural shortcoming restricts the function of the gas diffusion layer to evenly diffuse the reaction gas

On the other hand, the traditional carbon fiber paper has a large resistivity, which restricts the function of the electrons necessary for the conduction reaction of the gas diffusion layer and the electrons generated by the reaction.

These shortcomings directly affect the electrochemical performance of fuel cell membrane electrodes such as reactivity.

Moreover, traditional carbon fiber paper has poor flexibility, which is not conducive to processing

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