标题:Chemical and mechanical stability of a Sihcone gasket material exposed to PEM fuel cell environment
作者:Jinzhu Tan;Y.J. Chao;Min Yang;Woo-Kum Lee;J.W. Van Zee
通讯作者:Chao, Y J
作者机构:[Tan, J] College of Mechanical and Power Engineering, Nanjing University of Technology, Nanjing, Jiangsu 210009, China;[ Chao, Y.J] College of Enginee 更多
会议名称:3rd Annual/USA Joint Symposium on Hydrogen and Fuel Cell Technologies
会议日期:JUN 11-13, 2008
来源:International journal of hydrogen energy
出版年:2011
卷:36
期:2
页码:1846-1852
DOI:10.1016/j.ijhydene.2009.12.048
关键词:PEM fuel cell;Silicone material;Chemical stability;Mechanical stability
摘要:Proton exchange membrane (PEM) fuel cell stack requires gaskets in each cell to keep the reactant gas and liquid within their respective regions. Long-term chemical and mechanical stability and durability of the gaskets are critical to both sealing and the electrochemical performance of the fuel cells. In this paper, the chemical and mechanical degradation of a commercially available elastomeric Silicone material were investigated. A simulated solution at two temperatures, that are close to actual PEM fuel cell environment, was used. Optical microscopy was used to show the topographical changes on the sample surface. Attenuated total reflection Fourier transform infrared (ATR-FTIR) spectroscopy and atomic absorption spectrometer analysis were employed to study the surface chemical degradation of the samples after exposure to the simulated PEM fuel cell environment. Microindentation and dynamic mechanical analysis (DMA) were used to assess the change of mechanical properties of the samples exposed to the environment. The ATR-FTIR results indicate that the surface chemistry of the Silicone material was altered after exposure to the environment over time. In addition, atomic absorption spectrometry detected silicon and Calcium leached from the gasket material into the soaking solution. Microindentation test results show that the sample surface hardening occurred and the elastic modulus increased for the Silicone material exposed to the environment.
收录类别:CPCI-S;EI;SCOPUS;SCIE
WOS核心被引频次:20
Scopus被引频次:25
资源类型:会议论文;期刊论文
原文链接:https://www.scopus.com/inward/record.uri?eid=2-s2.0-79551488826&doi=10.1016%2fj.ijhydene.2009.12.048&partnerID=40&md5=11d60765c201b72cd0cba9fd41c17f61
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