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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 :
NameEmailORCID
Yang, JYUNSPECIFIEDUNSPECIFIED
Shen, PKUNSPECIFIEDUNSPECIFIED
Varcoe, Jj.varcoe@surrey.ac.ukUNSPECIFIED
Wei, ZDUNSPECIFIEDUNSPECIFIED
Date : 15 April 2009
Identification Number : https://doi.org/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 : 17 May 2017 14:55
URI: http://epubs.surrey.ac.uk/id/eprint/830750

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