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Indexed by:Journal Papers

Date of Publication:2020-02-01

Journal:IONICS

Included Journals:EI、SCIE

Volume:26

Issue:2

Page Number:1003-1009

ISSN No.:0947-7047

Key Words:PTFE; (PMo12O40)(X)-(PO-OH)(Y); High-temperature; PEMFC; Proton conductivity

Abstract:A novel high-temperature proton exchange membrane (PEM) (PTFE/(PMo12O40)(X)-(PO-OH)(Y) composite membranes) was prepared by impregnating mixed acid into the porous PTFE membrane. The porous PTFE membrane serves as the support structure of the membrane, and (PMo12O40)(X)-(PO-OH)(Y) sol is used as the proton conductor. The solid poly acid (PMo12O40)(X)-(PO-OH)(Y) exhibits a proton conductivity of 0.025 S cm(-1) at 180 degrees C, and the PTFE/(PMo12O40)(X)-(PO-OH)(Y) membrane presents a good proton conductivity (0.02 S cm(-1)) when the relative humidity is below 0.5% and temperature is 180 degrees C. Besides, the PTFE/(PMo12O40)(X)-(PO-OH)(Y) membrane performs moderate property as tested in hydrogen fuel cells. SEM and EDX reveal that the structure of (PMo12O40)(X)-(PO-OH)(Y) gel is uniformly distributed in the pores of PTFE, which enhanced the proton conductivity of the composite membranes.