Crack formation on membrane electrode assembly (Mea) under static and cyclic loadings

Yusuke Kai, Yuki Kitayama, Masaki Omiya, Tomoaki Uchiyama, Manabu Kato

研究成果: Conference contribution

5 被引用数 (Scopus)

抄録

Mechanical reliabilities of membrane electrode assemblies (MEA) in polymer electrolyte fuel cells (PEFCs) are a major concern to fuel cell vehicles. Hygro-thermal cyclic conditions induce the mechanical stress in MEA and cracks are formed under operating conditions. The purpose of this paper is to understand the failure mechanism of MEA under several mechanical and environmental conditions for the critical design of durable PEFCs. We carried out both static tensile tests and low cycle fatigue tests for MEA. For tensile tests, temperature and humidity in a test chamber were controlled and the surface crack formation of MEA was observed by a video micro scope in situ. Low cycle fatigue tests were carried out in room condition and the number of cycles to crack formation was measured. The results showed that the mechanical properties of MEA were influenced by temperature and humidity. The observations of MEA during tensile tests revealed that cracks were formed on the surface of catalyst layers just after the yielding of MEA. This result indicates that the deformation mismatch between catalyst layer and proton exchange membrane (PEM) is an important parameter to suppress the crack formation in MEA. The results of low cycle fatigue tests revealed that the fatigue strength of MEA followed the Coffin-Manson law and the fatigue design of MEA based on the Coffin-Manson law is possible. This result is valuable for the critical design of durable PEFCs.

本文言語English
ホスト出版物のタイトルASME 2012 10th International Conference on Fuel Cell Science, Engineering and Technology Collocated with the ASME 2012 6th International Conference on Energy Sustainability, FUELCELL 2012
出版社American Society of Mechanical Engineers (ASME)
ページ143-151
ページ数9
ISBN(印刷版)9780791844823
DOI
出版ステータスPublished - 2012 1 1
イベントASME 2012 10th International Conference on Fuel Cell Science, Engineering and Technology, FUELCELL 2012 Collocated with the ASME 2012 6th International Conference on Energy Sustainability - San Diego, CA, United States
継続期間: 2012 7 232012 7 26

出版物シリーズ

名前ASME 2012 10th International Conference on Fuel Cell Science, Engineering and Technology Collocated with the ASME 2012 6th International Conference on Energy Sustainability, FUELCELL 2012

Other

OtherASME 2012 10th International Conference on Fuel Cell Science, Engineering and Technology, FUELCELL 2012 Collocated with the ASME 2012 6th International Conference on Energy Sustainability
国/地域United States
CitySan Diego, CA
Period12/7/2312/7/26

ASJC Scopus subject areas

  • 燃料技術
  • 再生可能エネルギー、持続可能性、環境

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