Carbon-polymer composite coatings for PEM fuel cell bipolar plates
Carbon-polymer composite coatings for PEM fuel cell bipolar plates
复制标题
DOI：
10.1016/j.ijhydene.2013.10.115
复制
发表时间：
2014-01-13
影响因子：
7.2
通讯作者：
Seland, Frode
中科院分区：
文献类型：
--
作者：
Husby, Hans;Kongstein, Ole Alvard;Seland, Frode
研究了不锈钢 316L 基底上的碳聚合物复合涂层用作聚合物电解质膜燃料电池的双极板材料。该涂层由 45 vol% 石墨、5 vol% 炭黑和 50 vol% 环氧粘合剂组成。通过喷涂技术施加涂层，然后在粘合剂固化时进行热压。在125 N cm(-2) 的压实压力下测得界面接触电阻为9.8 m Omega cm(2)。异位电化学测试表明，在0.0191和0.6191 V-SHE电位下，碳聚合物复合涂层板极化后界面接触电阻的增加小于裸不锈钢板。在 1.0 V-SHE 下，涂层板和裸不锈钢板的电阻增加类似，并达到不可接受的值。通过涂层横截面的扫描电子显微镜成像估计涂层的孔隙率约为50%。版权所有 (C) 2013，Hydrogen Energy Publications, LLC。由爱思唯尔有限公司出版。保留所有权利。
A carbon-polymer composite coating on stainless steel 316L substrates was investigated for the use as bipolar plate material for polymer electrolyte membrane fuel cells. The coating consisted of 45 vol% graphite, 5 vol% carbon black and 50 vol% epoxy binder. The coating was applied by a spraying technique followed by hot-pressing while the binder cured. An interfacial contact resistance of 9.8 m Omega cm(2) at a compaction pressure of 125 N cm(-2) was measured. Ex-situ electrochemical tests showed that the carbon-polymer composite coated plates had smaller increases in the interfacial contact resistance after polarization than bare stainless steel plates at potentials of 0.0191 and 0.6191 V-SHE. At 1.0 V-SHE, the resistance increased similarly for both the coated plate and the bare stainless steel plate, and reached unacceptable values. The porosity of the coating was estimated with scanning electron microscope imaging of the cross-section of the coating to be about 50%. Copyright (C) 2013, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.