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Preparation of polytetrafluoroethylene porous membrane based composite alkaline exchange membrane with improved tensile strength and its fuel cell test

Lookup NU author(s): Emeritus Professor Keith Scott

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Abstract

A strategy to improve the alkaline exchange membrane tensile strength was introduced based on porous PTFE and quaternized polyvinyl benzyl chloride (qPVBz/OH-). A thin PTFE film was used as the support to prepare the composite AAEM to improve the mechanical strength. Tensile stress tests showed 51.1 MPa which was twice that of the pure anion exchange membrane qPVBz/OH-. SEM observations showed that the pores of the PTFE were successfully filled with qPVBz/OH- polymer and there was no structure defects in the cross-section of the resultant membrane. The synthesized composite membrane had very good thermal stability. The through plane ionic conductivity was in the range of 1.65 x 10(-2) to 2.2 x 10(-2) S cm(-1) in the temperature range of 25 degrees C-60 degrees C. The power density of H-2 and O-2 fuel cell gave 162 mW cm(-2). Copyright (C) 2012, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.

Publication metadata

Author(s): Cao YC, Scott K, Wang X

Publication type: Article

Publication status: Published

Journal: International Journal of Hydrogen Energy

Year: 2012

Volume: 37

Issue: 17

Pages: 12688-12693

Print publication date: 01/09/2012

ISSN (print): 0360-3199

ISSN (electronic): 1879-3487

Publisher: Elsevier Ltd

URL: http://dx.doi.org/10.1016/j.ijhydene.2012.05.134

DOI: 10.1016/j.ijhydene.2012.05.134

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