Nafion/polyaniline composite membranes specifically designed to allow proton exchange membrane fuel cells operation at low humidity

Yang, JY, Shen, PK, Varcoe, J and Wei, ZD (2009) Nafion/polyaniline composite membranes specifically designed to allow proton exchange membrane fuel cells operation at low humidity J POWER SOURCES, 189 (2). pp. 1016-1019.

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Abstract

A Nafion and polyaniline composite membrane (designated Nafion/PANI) was fabricated using an in situ chemical polymerization method. The composite membrane showed a proton conductivity that was superior to that obtained with Nafion (R) 112 at low humidity (e.g. RH=60%). Water uptake measurements revealed similarities between the Nafion (R) 112 and Nafion/PANI membranes at different humidities. The high conductivity of the Nafion/PANI membrane at low humidity is hypothesized to be due to the existence of the extended conjugated bonds in the polyaniline; proton transfer is facilitated via the conjugated bonds in lower humidity environments allowing retention of the relatively high conductivity. Correspondingly, the performance of a single cell fuel cell containing the Naflon/PANI composite membrane is improved compared to a Nafion (R) 112-containing cell under low humidity conditions. This is important for portable fuel cells, which are required to operate without external humidification. (C) 2008 Elsevier B.V. All rights reserved.

Item Type:	Article
Authors :	Name Email ORCID Yang, JY Shen, PK Varcoe, J j.varcoe@surrey.ac.uk Wei, ZD
Date :	15 April 2009
DOI :	10.1016/j.jpowsour.2008.12.076
Uncontrolled Keywords :	Proton exchange membrane, Fuel cells, Conductivity, Polyaniline, Humidity, TRANSPORT-PROPERTIES, POLYANILINE, CONDUCTIVITY, ACID, POLYMERIZATION, ELECTROLYTE, PERFORMANCE, MATRIX, NAFION
Depositing User :	Symplectic Elements
Date Deposited :	17 May 2017 11:17
Last Modified :	16 Jan 2019 18:13
URI:	http://epubs.surrey.ac.uk/id/eprint/830750

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