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学科主题: 物理化学
题名: The progress on the surface treatments of metal bipolar plate for Proton exchange fuel cells in DICP
作者: Hou M(侯明)
会议名称: International Symposium on Electrochemistry for Energy Conversion and Storage
会议日期: 2009-8-22
出版日期: 2009-08-22
会议地点: 中国
通讯作者: 侯明
部门归属: 三室
主办者: 武汉大学
摘要: Bipolar plate is a key component in proton exchange membrane fuel cells (PEMFCs). It functions as the current conductor between cells, provides the manifold for reactant gases flow, and constitutes the backbone of a fuel cell stack. The requirements for bipolar plates should be high corrosion resistance and electrical conductivity in the harsh environment of PEMFC. Low Cost is also the demand for the commercialization targets of DOE[1]. Metal bipolar plates are the hot topic and extensively researched currently[2]. However, pinhole-free coating on metal bipolar plate with well contacting electrical conductivity is still a big challenge in PEMFC application. Some research activities on metal bipolar plate have been conducted in our lab. 1.Ag-PTFE composite coating[3] Ag–PTFE film was electrodeposited with silver-gilt solution of nicotinic acid by a bi-pulse electroplating power supply on 316 L stainless steel bipolar plate of PEMFC. Results showed that the Ag–PTFE composite coating obviously reduced the defects, enhanced the surface energy on compared with those on the pure Ag. In addition, the interfacial contact resistance of the composite coating stays as low as the pure Ag coating measured by potentiodynamic and potentiostatic tests. A short stack with the bipolar plates was evaluated. 2.CrxNY[4] [5] Pulsed bias arc ion plating was applied in Cr-N coating on 316L stainless steel. Surface micrograph, film thickness, film composition, corrosion resistance, interfacial conductivity and contact angle with water of the sample obtained at the optimal flow rate of N2 were investigated. The atomic ratio of Cr to N was close to 2:1 and the CrN phase with crystal planes of (111), (200), (220) and (311) was found in the film. Potentiodynamic and potentiostatic tests showed that the corrosion resistance of the bipolar plate sample was greatly enhanced. 3.CrC[6] Carbon-based films on 316L stainless steel were prepared by pulsed bias arc ion plating. Three kinds of films were formed including the pure C film, the C–Cr composite film and the C–Cr–N composite film. Interfacial conductivity of the bipolar plate with C–Cr film was the highest, which showed great potential of application. Corrosion tests in simulated PEMFC environments revealed that the C–Cr film coated sample always showed better anticorrosive performance than 316L stainless steel either in reducing or oxidizing environments.
语种: 中文
内容类型: 会议论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/113786
Appears in Collections:中国科学院大连化学物理研究所_会议论文

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Recommended Citation:
Hou M. The progress on the surface treatments of metal bipolar plate for Proton exchange fuel cells in DICP[C]. 见:International Symposium on Electrochemistry for Energy Conversion and Storage. 中国. 2009-8-22.
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