Electrically conductive amorphous carbon coating on metal bipolar plates for PEFC

被引：84

作者：

Show, Yoshiyuki ^{[1
]}

机构：

[1] Tokai Univ, Dept Elect & Elect Engn, Hiratsuka, Kanagawa 2591292, Japan

来源：

SURFACE & COATINGS TECHNOLOGY | 2007年 / 202卷 / 4-7期

关键词：

fuel cell; bipolar plate; amorphous carbon;

D O I：

10.1016/j.surfcoat.2007.07.065

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Ti bipolar plates coated with amorphous carbon (a-C) film were developed for polymer electrolyte membrane fuel cells (PEMFC). The a-C films were coated at various growth temperatures. A low growth temperature caused the resistivity of the a-C film to be high. An a-C film coating with high resistivity resulted in an increase in the contact resistance between the surface of the bipolar plate and the membrane electrode assembly (MEA) of up to 440 Omega cm(2) which results in a decrease in the output power of the fuel cell. On the other hand, an a-C film coating with a low resistivity of 10(-3) Omega cm was formed by an increase in the growth temperature of up to 600 degrees C. The bipolar plate coated with this a-C film showed low contact resistance (20 m Omega) between its surface and the MEA. Therefore, the fuel cell assembled from Ti bipolar plates coated with the a-C film at 600 degrees C showed an output power of 1.8 W, giving it an output 1.4 times higher than the output of a bare (not a-C coated) Ti bipolar plate fuel cell. (C) 2007 Elsevier B.V. All rights reserved.

引用

页码：1252 / 1255

页数：4

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