A kind of preparation method of low-precipitate graphite original plate
A technology of precipitates and graphite, applied in the field of preparation of low-precipitate graphite original plates, can solve the problems of reduced fuel cell life, accelerated aging of membrane electrode assembly seals, platinum catalyst poisoning, etc., and achieves the effect of ensuring service life.
Active Publication Date: 2021-09-14
武汉氢能与燃料电池产业技术研究院有限公司
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[0005] The invention provides a method for preparing a low-precipitate graphite original plate to solve the problem of platinum catalyst poisoning caused by precipitates in the prior art after the graphite original plate is made into a flexible graphite bipolar plate, and the acceleration of the membrane electrode assembly and the sealing member. Aging, reduced fuel cell life, etc.
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[0015] The principles and features of the present invention are described below, and the examples given are only used to explain the present invention, and are not intended to limit the scope of the present invention. The present invention is described more specifically by way of example in the following paragraphs. Advantages and features of the present invention will be apparent from the following description and claims.
[0016] The invention provides a kind of preparation technology of low-precipitate graphite original plate, and it comprises the steps:
[0017] S1. Select the graphite raw material, and use a strong oxidant to chemically purify the graphite raw material to obtain purified graphite.
[0018] In this embodiment, the graphite raw material is preferably natural graphite with a mesh number ≤ 80, which is natural large flake graphite, which is easy to intercalate, so that it is easy to expand to form worm graphite.
[0019] Wherein, in this embodiment, the str...
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Abstract
The invention provides a method for preparing a low-precipitate graphite original plate to solve the problem of platinum catalyst poisoning caused by precipitates in the use process after the graphite original plate is made into a flexible graphite bipolar plate in the prior art. Aging, reducing fuel cell life and other issues, it includes the following steps: S1, select graphite raw materials, use strong oxidant to chemically purify the graphite raw materials to obtain purified graphite; S2, use acidic intercalation agent to intercalate the purified graphite to obtain intercalated S3, using alkaline cleaning agent to clean the intercalated graphite, and then washing with deionized water; S4, adding conductive carbon black to mix and dry to obtain dry graphite; S5, to expand the dry graphite at high temperature to obtain Worm graphite; S6, pressing the worm graphite to form a graphite original plate.
Description
technical field [0001] The invention relates to the field of fuel cells, in particular to a method for preparing a low-precipitate graphite original plate. Background technique [0002] Proton exchange membrane fuel cell (PEMFC) is a technology that electrochemically reacts hydrogen with oxygen in the air and releases electrical energy. PEMFC has the advantages of high energy conversion efficiency, low noise, and zero emission. It is an environmentally friendly energy source and has broad market prospects in the future. [0003] The bipolar plate is one of the important components in PEMFC, which mainly plays the roles of reacting gas diversion, current conduction, air barrier, structural support and heat conduction. At present, the technical routes of bipolar plates mainly include metal bipolar plates and graphite bipolar plates. Compared with metal bipolar plates, graphite bipolar plates have good chemical stability. In low-level areas, graphite stacks have broad applica...
Claims
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IPC IPC(8): C01B32/225C01B32/215C01B32/21H01M8/0213
CPCC01B32/21C01B32/215C01B32/225H01M8/0213Y02E60/50
Inventor 李新花仕洋郑泽民项福军王傲
Owner 武汉氢能与燃料电池产业技术研究院有限公司