Method for preparing fuel cell polar plate through 3D printing

Abstract

The invention discloses a method for preparing a fuel cell polar plate through 3D printing. The fuel cell polar plate is prepared by the following steps: (a) sequentially adding nano-alloy powder, polylactic acid, glass fibers and an emulsifying agent into a dichloromethane solvent, so as to prepare solid jelly; (b) carrying out low-temperature thermal treatment on the solid jelly under a vacuum condition, and carrying out ball milling, granulation and wiredrawing, so as to obtain a 3D printing raw material; and (c) printing the 3D printing raw material, carrying out plasma thermal treatment,so as to obtain a core-shell structure fuel cell polar plate material in which an alloy phase is packaged with modified polylactic acid. The method has the beneficial effects that the prepared fuel cell polar plate has good surface hydrophobicity, high glass transition temperature and softening temperature and good conductivity and can adequately meet the demands of fuel cells; and meanwhile, theprocess is simple, the yield and the cost are superior, and the method has potential in large-scale application.

Description

technical field [0001] The invention relates to the field of fuel cells, in particular to the preparation of battery polar plates, and in particular to a method for preparing fuel cell polar plates by 3D printing. Background technique [0002] The proton exchange membrane fuel cell is a clean, environmentally friendly and efficient new energy conversion device. It uses hydrogen as fuel, decomposes the gas into protons and electrons through a catalyst, and passes through the proton exchange membrane to combine with oxygen ions generated by oxygen decomposition to form water. Energy is thus released and converted into electric current. The plate material is a key component of the fuel cell, and its role in the fuel cell includes distributing the fuel and oxidant in the cell, collecting and conducting current, and outputting the generated liquid water. [0003] The diversion groove of the fuel cell plate has regular shapes such as serpentine flow field, straight channel flow f...

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Problems solved by technology

[0008] It can be seen that the preparation process for fuel cell plates in the prior art is complicated, and the processing of irregular flow fields is difficult. However, when using 3D printing technology, the raw materials are relatively limited, and most of the raw materials have low melting temperatures, making it difficult to adapt to fuel cells. At the same time, because most of the raw materials are organic polymer materials, their conductivity is poor, and it is difficult to meet the needs of fuel cell plates.

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