A kind of preparation method of fuel cell bipolar plate

A fuel cell and bipolar plate technology, which is applied to fuel cells, circuits, electrical components, etc., can solve the problems of poor bending strength and unsatisfactory conductivity of bipolar plates, and achieve improved density, good conductivity, and improved The effect of flexural strength
CN109818004BActive Publication Date: 2020-06-30HEFEI UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
HEFEI UNIV OF TECH
Publication Date
2020-06-30

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Abstract

The invention discloses a preparation method of a fuel cell bipolar plate. The raw materials of the bipolar plate of the fuel cell can be processed by adopting natural graphite, synthetic graphite, carbon black, graphite fibers and the like, and a metal plate is also arranged in a polar plate body, so that the bending strength is greatly improved, and the compactness of a part is improved, and theeffect of improving the mechanical strength is achieved. Natural graphite is used as a base material, and the synthetic graphite, carbon black, graphite fibers and the like are added to adjust the mechanical strength and the electrical conductivity of the material. Before sintering processing, different particles are mixed and ground to obtain fine particles, then a certain proportion of binder is added into the graphite mixture to enable the powder material to be bonded together after laser sintering, and different proportions of synthetic graphite, carbon black and graphite fibers in the material mixing process are controlled to have good conductivity.
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Description

technical field

[0001] The invention belongs to the technical field of fuel cells, and more specifically relates to a method for preparing a bipolar plate of a fuel cell. Background technique

[0002] The application number is CN201510543885.4, which discloses a metal bipolar plate for fuel cells, including a stainless steel substrate and its surface modification layer, and the surface modification layer includes a continuous insulating layer and discontinuous conductive particles attached to the surface of the stainless steel substrate. The surface treatment process of the metal bipolar plate for the fuel cell of the invention combines the deposition of a continuous insulating layer and discontinuous conductive particles on the surface, which can not only form a dense protective layer and greatly reduce the corrosion rate of the metal bipolar plate, but also It can reduce the contact resistance and prolong the service life of the metal bipolar plate. Depositing the discont...

Claims

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