Understanding the Water Retention of Composite Proton Exchange Membranes Based on Surface Chemistry of Inorganic Fillers
- Pennsylvania State University
- ORNL
Use of metal oxide additives is considered a viable option for improving thermal, chemical, and transport properties of the proton exchange membranes for fuel cells operating at elevated temperatures (>100 C) and reduced relative humidity (<70%). The purpose of this paper is to review the characteristics of some specific oxide materials for fuel cell applications based on available experimental surface chemistry data and surface modeling. Several commonly used oxides were differentiated based on their thermodynamic solubility, surface charge, and states of the surface water. Surface charge is discussed as a primary factor controlling water retention by the composite membranes in dehydrating environments.
- Research Organization:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC)
- DOE Contract Number:
- DE-AC05-00OR22725
- OSTI ID:
- 1021940
- Journal Information:
- Electrochemical Society Transactions, Vol. 11, Issue 27
- Country of Publication:
- United States
- Language:
- English
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