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

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

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

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.

Original languageEnglish
Title of host publicationASME 2014 12th International Conference on Fuel Cell Science, Engineering and Technology, FUELCELL 2014 Collocated with the ASME 2014 8th International Conference on Energy Sustainability
PublisherWeb Portal ASME (American Society of Mechanical Engineers)
ISBN (Electronic)9780791845882
DOIs
Publication statusPublished - 2014 Jan 1
EventASME 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
Duration: 2014 Jun 302014 Jul 2

Publication series

NameASME 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
CountryUnited States
CityBoston
Period14/6/3014/7/2

ASJC Scopus subject areas

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

Fingerprint Dive into the research topics of 'Crack propagation resistance in thickness direction of Proton exchange membrane (PEM)'. Together they form a unique fingerprint.

  • Cite this

    Sasaki, Y., Kai, Y., Omiya, M., Uchiyama, T., & Kumei, H. (2014). Crack propagation resistance in thickness direction of Proton exchange membrane (PEM). In 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