材料科学
质子交换膜燃料电池
腐蚀
极化(电化学)
燃料电池
涂层
化学工程
碳纤维
复合材料
化学
物理化学
工程类
复合数
作者
Wenjiao Zhang,Yanli Wang
标识
DOI:10.1016/j.ceramint.2022.11.104
摘要
To solve the durability problem caused by carbon corrosion in the porous carbon paper gas diffusion layer (GDL) of proton exchange membrane fuel cell (PEMFC), a Cr7C3 ceramic coating on porous carbon paper by molten salt method was prepared. The obtained Cr7C3 coating is dense and shows good adherent with the carbon paper. Based on the corrosion resistance testes, it is concluded that the Cr7C3 coated carbon paper can keep high chemical stability in the long-time acid immersion accelerated corrosion tests and simulated cathodic proton exchange membrane fuel cells environment. The carbon paper with Cr7C3 coating shows a small current density with a value of about 1.1 × 10−5 A cm−2 in the potentiostatic polarization test under 1 M H2SO4 + 2 ppm HF at 70 °C and1.4 VSCE for 72 h. Meanwhile, the resistivity of carbon paper with Cr7C3 coating prepared is 30% lower than that of pure carbon paper, and the conductivity is 1.5 times that of pure carbon paper.
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