An integrated fuel cell electrode with cascade distribution of flow field and preparation method thereof

Abstract

The invention discloses an integrated fuel cell electrode employing cascade flow field distribution and a preparation method of the integrated fuel cell electrode, and belongs to the field of fuel cells. The preparation method comprises an optimal design of a fuel cavity structure, so that integration of a cavity, a collector plate, a diffusion layer and a catalyst layer is realized. The method particularly comprises designing of various levels of channels and fabrication of a thin catalyst layer; and the fuel cavity is rapidly printed and molded by a conductive three-dimensional (3D) printing material. Four levels of channels are sequentially distributed in the integrated fuel cell electrode employing cascade flow field distribution; when fuel flows through the first level channel of the fuel cavity, the fuel passes through the second level of channel in cascade distribution, and then infiltrates into the third level of channel; meanwhile, a compact fourth level of channel is also arranged in the third level of channel, so that the fuel evenly permeates in the whole electrode; the catalytic activity surface area is greatly increased; the discharge current which is higher than that of the traditional electrode can be provided; the design of the cascade flow field distribution is beneficial to flowing and infiltration of the fuel; and according to the overall design scheme, the electrode is relatively compact in structure and relatively excellent in performance.

Description

[0001] 【Technical field】 [0002] The invention belongs to the field of fuel cells, and in particular relates to an integrated fuel cell electrode with cascaded flow field distribution and a preparation method thereof. [0003] 【Background technique】 [0004] Fuel cells have many advantages such as environmental protection, high efficiency, and fast start-up, and have attracted widespread attention. The structure of the traditional fuel cell is that the fuel chamber, the collector plate, the diffusion layer and the catalytic layer are closely arranged in sequence. This separation arrangement of the fuel chamber, the collector plate, the diffusion layer and the catalytic layer makes the size of the battery larger , The assembly and sealing are complicated, and the transmission resistance of the fuel increases, thereby reducing the performance of the battery. By optimizing the electrode structure and cavity structure, the problems of difficult mass transfer and uncompact structu...

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