Crack propagation resistance in thickness direction of Proton exchange membrane (PEM)

Yusuke Sasaki, Yusuke Kai, Masaki Omiya, Tomoaki Uchiyama, Hideyuki Kumei

研究成果: Conference contribution

抜粋

Mechanical reliabilities of membrane electrode assemblies (MEA) in polymer electrolyte fuel cells (PEFCs) are a major concern to fuel cell vehicles. Especially, MEAs are designed to be thinner for obtaining higher generating performance and reducing cost. Proton exchange membranes (PEM) in MEA are especially important parts. When PEFCs generate power, MEAs are in high temperature and water is generated. Hygrothermal cyclic conditions induce the mechanical stress in MEA and cracks are formed on catalyst layers. Once cracks form on catalyst layers, cracks may propagate into PEM or on the interface between the catalyst layer and PEM. The failures of PEM induce the leak of fuel gases and result in the shortage of output power. Therefore, in order to ensure the durability of thin MEAs, it is important to know the fracture resistance of PEM. The deformation of PEM is constrained by coated catalyst layers and crack propagates into thickness direction of PEM under the constrained condition. However, there are no available data for the fracture resistance of cracks propagating into thickness direction in MEA, because of the difficulty of measurements. Therefore, in this paper, we try to measure the fracture resistance of cracks propagating into thickness direction in PEM under several environmental conditions. Elastic-plastic fracture toughness tests for PEM were carried out in temperature and humidity controlled chamber. The results showed that the fracture resistances of crack propagation into thickness direction of PEM were strongly affected by temperature and humidity conditions.

元の言語English
ホスト出版物のタイトルASME 2014 12th International Conference on Fuel Cell Science, Engineering and Technology, FUELCELL 2014 Collocated with the ASME 2014 8th International Conference on Energy Sustainability
出版者Web Portal ASME (American Society of Mechanical Engineers)
ISBN(電子版)9780791845882
DOI
出版物ステータスPublished - 2014 1 1
イベントASME 2014 12th International Conference on Fuel Cell Science, Engineering and Technology, FUELCELL 2014 Collocated with the ASME 2014 8th International Conference on Energy Sustainability - Boston, United States
継続期間: 2014 6 302014 7 2

出版物シリーズ

名前ASME 2014 12th International Conference on Fuel Cell Science, Engineering and Technology, FUELCELL 2014 Collocated with the ASME 2014 8th International Conference on Energy Sustainability

Other

OtherASME 2014 12th International Conference on Fuel Cell Science, Engineering and Technology, FUELCELL 2014 Collocated with the ASME 2014 8th International Conference on Energy Sustainability
United States
Boston
期間14/6/3014/7/2

    フィンガープリント

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Energy Engineering and Power Technology

これを引用

Sasaki, Y., Kai, Y., Omiya, M., Uchiyama, T., & Kumei, H. (2014). Crack propagation resistance in thickness direction of Proton exchange membrane (PEM). : ASME 2014 12th International Conference on Fuel Cell Science, Engineering and Technology, FUELCELL 2014 Collocated with the ASME 2014 8th International Conference on Energy Sustainability (ASME 2014 12th International Conference on Fuel Cell Science, Engineering and Technology, FUELCELL 2014 Collocated with the ASME 2014 8th International Conference on Energy Sustainability). Web Portal ASME (American Society of Mechanical Engineers). https://doi.org/10.1115/FuelCell2014-6407