Journal
POLYMERS
Volume 13, Issue 14, Pages -Publisher
MDPI
DOI: 10.3390/polym13142364
Keywords
hydrocarbon membrane; inorganic nanofiller; proton conductivity; ion cluster; PEMFC
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Funding
- Jeonbuk National University, Republic of Korea
- Korea Institute of Energy Technology Evaluation and Planning (KETEP)
- Ministry of Trade, Industry & Energy (MOTIE) of Republic of Korea [20184030202210]
- Basic Science Research Program through the National Research Foundation of Korea (NRF) - Ministry of Science, ICT and Future Planning [NRF-2020R1A2B5B01001458]
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The integration of phosphotungstic acid and graphene oxide into sulfonated poly(arylene ether) resulted in a composite membrane with high thermal stability and proton conductivity, showing promising potential for PEM fuel cell applications.
The development of potential and novel proton exchange membranes (PEMs) is imperative for the further commercialization of PEM fuel cells (PEMFCs). In this work, phosphotungstic acid (PWA) and graphene oxide (GO) were integrated into sulfonated poly(arylene ether) (SPAE) through a solution casting approach to create a potential composite membrane for PEMFC applications. Thermal stability of membranes was observed using thermogravimetric analysis (TGA), and the SPAE/GO/PWA membranes exhibited high thermal stability compared to pristine SPAE membranes, owing to the interaction between SPAEK, GO, and PWA. By using a scanning electron microscope (SEM) and atomic force microscope (AFM), we observed that GO and PWA were evenly distributed throughout the SPAE matrix. The SPAE/GO/PWA composite membrane comprising 0.7 wt% GO and 36 wt% PWA exhibited a maximum proton conductivity of 186.3 mS cm(-1) at 90 degrees C under 100% relative humidity (RH). As a result, SPAE/GO/PWA composite membrane exhibited 193.3 mW cm(-2) of the maximum power density at 70 degrees C under 100% RH in PEMFCs.
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