Scanning force microscopy study of phase segregation in fuel cell membrane materials as a function of solvent polarity and relative humidity
- Los Alamos National Laboratory
Scanning force microscopy (SFM) phase imaging provides a powerful method for directly studying and comparing phase segregation in fuel cell membrane materials due to different preparation and under different temperature and hwnidity exposures. In this work, we explored two parameters that can influence phase segregation: the properties of the solvents used in casting membrane films and how these solvents alter phase segregation after exposure to boiling water as a function of time. SFM was used under ambient conditions to image phase segregation in Nafion samples prepared using five different solvents. Samples were then subjected to water vapor maintained at 100C for periods ranging from 30 minutes to three hours and re-imaged using the same phase imaging conditions. SFM shows what appears to be an increase in phase segregation as a function of solvent polarity that changes as a function of water exposure.
- Research Organization:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC52-06NA25396
- OSTI ID:
- 983876
- Report Number(s):
- LA-UR-10-00114; LA-UR-10-114; TRN: US201014%%1865
- Resource Relation:
- Journal Volume: 1213; Conference: MRS 2009 Fall Meeting ; November 30, 2009 ; Boston, MA
- Country of Publication:
- United States
- Language:
- English
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