Journal
SOLID STATE IONICS
Volume 393, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.ssi.2023.116186
Keywords
Proton conductivity; Acid modified metal oxide; Tin pyrophosphate; PEMFC; Polybenzimidazole
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The effect of SnP2O7 microparticles incorporation on the performance of PBI-based membrane for fuel cells was investigated. Highly dispersed SnP2O7 microparticles derived from wet mechanochemical treatment resulted in a PBI-based composite membrane with high proton conductivity and superior acid retention property. This composite membrane achieved the highest peak power density under anhydrous conditions, showing the enhancement of high-temperature PEMFCs performance.
Proton conductivity and acid retention property of PBI-based polymer electrolyte membrane is critical factor for high-temperature PEMFCs with high performance. The present study was undertaken in order to demonstrate the effect of SnP2O7 microparticles incorporation for the PBI-based membrane to the fuel cell performance. Besides, the correlation between dispersion property of additives and fuel cell performance was investigated, by taking the larger particle sizes of Sn-originated material into account. Highly dispersed SnP2O7 microparticles derived by the wet mechanochemical treatment has resulted in the novel PBI-based composite membrane with highproton conductivity (4.17 mS cm(-1) at 160 degrees C, anhydrous) and superior acid retention property. Consequently, the highest peak power density of 373 mW cm 2 at 160 degrees C under anhydrous conditions was achieved for the composite membrane with wet-mechanical milled SnP2O7, while the membrane without mechanochemical treatment showed lowest peak power density (168 mW cm(-2)) even inferior to the pure PBI membrane. Investigations into the PBI-based composite electrolyte membrane incorporated with highly dispersed SnP2O7 protonic conductive microparticles have yielded a performance enhancement of high-temperature PEMFCs.
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