Catalyst slurry of proton exchange film fuel cell and application thereof

Abstract

The invention provides catalyst slurry of a proton exchange film fuel cell and an application thereof. The catalyst slurry is colloidal slurry prepared from catalyst, two or more than two perfluorosulfonic acid resin mixed solutions with different EW values and low-boiling-point alcohol solvent, then is sprayed to a proton exchange film through the ultrasonic spraying process, and is subjected tohot pressing with a commercial gas diffusion layer to prepare a film electrode so as to obtain battery performance with better performance. The method is advantaged in that pore distribution of the catalyst layer is optimized, the porosity of the catalyst layer is improved, a gas / liquid / solid three-phase interface in the catalyst layer is optimized while the proton conduction capability is considered, the electrochemical activity area and the mass ratio activity of the film electrode are further improved, especially, performance of a fuel cell is greatly improved, the method has great significance for subsequent slurry process development and reduction of platinum loading capacity, namely reduction of film electrode cost.

Description

technical field [0001] The invention belongs to the technical field of proton exchange membrane fuel cells, and more specifically relates to a catalyst slurry for proton exchange membrane fuel cells and its application. Background technique [0002] Proton exchange membrane fuel cell (PEMFC) is one of the important members of the fuel cell system and is currently the most promising new generation of green energy power system, which helps to solve the problems of energy crisis and environmental pollution. PEMFC has the advantages of low operating temperature, no noise, no vibration, fast start-up, clean emission, modular arrangement, high energy conversion efficiency and high power density. At present, compared with the United States, Japan and other countries, China's fuel cells have problems such as lack of key technologies, low degree of autonomy, and insufficient industrialization. [0003] Membrane electrode assembly (MEA) is the core technology and component of PEMFC, ...

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Problems solved by technology

[0007] However, most of the existing membrane electrode preparation processes similar to optimizing the three-phase interface adopt the method of introducing additives or mechanically changing the structure of the catalytic layer. This way of introducing foreign additives or changing the structure has the risk of reducing the conductivity and hydrophobicity of the catalytic layer. And will affect the membrane electrode life

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