Composite bipolar plate for miniature fuel cell and its preparing method

Abstract

This invention discloses a compound double pole plate for micro-fuel cell and its the preparation method, that is as follows: take a ultraviolet ray solidification polymer conducting material as thesubstrate, take high electric conductive copper as electric conductive layer, take bright nickel as corrosion resistance protective layer. Its manufacture uses a compound preparation craft, this craft units the advantages of the micro stamping (a low cost, big area, high efficiency microstructure composite craft) and the electric brush plating (a low cost micro plating craft), through nitrogeninfiltration superficial modification processing to copper nickel coating, enhance the double pole plate inoxidizability, reduces the contact resistance. All technological processes are conducted under normal temperature atmospheric pressure environmen. Advantages: low production cost, simple process and suitable to bulk production.

Description

technical field [0001] The invention relates to a micro-fuel bipolar plate, in particular to a composite bipolar plate for a micro-fuel cell and a preparation method thereof. Background technique [0002] Micro Fuel Cell (μFC) has become the best choice for micro batteries and micro energy due to its high energy conversion efficiency, high specific energy, environmental protection, rapid startup, light weight, small size, and simple structure. It has extremely broad application prospects in various portable electronic products and MEMS systems. Bipolar plates (collector plates, flow field plates, Bipolar Plates, BPPs) are one of the key components of micro fuel cells, which play an extremely important role in the performance, volume, life, cost, miniaturization and light weight of micro fuel cells. effect. [0003] At present, the biggest challenges faced by bipolar plates for micro fuel cells are: low cost, miniaturization and high performance. The flow field of the exis...

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Problems solved by technology

[0006] The purpose of the present invention is to solve the problems of the high cost of the current micro-fuel cell bipolar plate manufacturing process and the inability to process a true three-dimensional microstructure, and to provide a low production cost, simple process, suitable for mass production, and capable of realizing true three-dimensional curves. Composite bipolar plate for micro-fuel cell and its preparation method for low-cost preparation of cross-section micro-channel

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