Establishment method and application of catalyst layer microcosmic model

Abstract

The invention relates to an establishment method and application of a catalyst layer microcosmic model, and the establishment method comprises the following steps: S1, carrying out the model assumption and geometric setting of a catalyst layer, and obtaining a catalyst layer model; S2, establishing a representative volume unit model of the catalyst layer based on the obtained catalyst layer model;and S3, performing finite element analysis on the representative volume unit. Compared with the prior art, the three-dimensional finite element model of a catalyst layer is established on the basis of the actual microstructure and the mechanical property of the catalyst layer, the influence of different microstructures and actual working conditions on the mechanical property of the catalyst layeris further researched, and the performance improvement rule of the catalyst layer is analyzed; model reference is provided for optimizing the microstructure and the mechanical property of the protonexchange membrane fuel cell, and the improvement of the cell performance is facilitated; the invention can also be used for simulation research of the relationship between the microstructures and physical properties of the catalyst layer under different use conditions.

Description

technical field [0001] The invention relates to the field of fuel cells, in particular to a method for establishing a microscopic model of a catalyst layer and its application. Background technique [0002] The catalyst layer is one of the core components of the proton exchange membrane fuel cell, and it is the place where the fuel cell electrode reaction occurs. It is generally composed of Pt / C catalyst, polymer electrolyte (Nafion), water, etc. Among them, the catalyst particle is the reactive site, the polymer electrolyte as the carrier transfers protons, the pores of the catalytic layer constitute the coherent transmission channel of the reaction gas and product water, and the three-phase region formed by the contact of the catalyst, electrolyte and reaction gas is the place where the reaction takes place. Mainly, the microstructure and performance of the catalyst layer determine the performance and cycle life of the fuel cell. [0003] Pt / C catalysts and polymer electr...

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Problems solved by technology

However, on the basis of these models, there are few studies on the simulation experiments of their structures and properties using computer simulation calculations.

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