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A high conductivity untrathin anion-exchange membrane with 500+ h alkali stability for use in alkaline membrane fuel cells that can achieve 2 W cm-2 at 80 °C

Wang, Lianqin, Bellini, Marco, Miller, Hamish Andrew and Varcoe, John R. (2018) A high conductivity untrathin anion-exchange membrane with 500+ h alkali stability for use in alkaline membrane fuel cells that can achieve 2 W cm-2 at 80 °C Journal of Materials Chemistry A, 2018 (31). pp. 15404-15412.

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Abstract

This article describes the development of a sub-30 μm thick LDPE-based radiation-grafted anion-exchange membrane (RGAEM) with high performance characteristics when fully hydrated. This RG-AEM had a OH– anion conductivity of 200 mS cm- 1 (80°C in 100% relative humidity (RH) environments), which led to a H2/O2 anion-exchange membrane fuel cell (AEMFC) performance of 2.0 W cm-2 (80°C, RH = 92% environments, PtRu/C anode, and a Pt/C cathode) and a H2/air(CO2-free) AEMFC peak power density of 850 mW cm-2 with a (non-platinum-group) Ag/C cathode electrocatalyst. When hydrated in a RH = 100% N2 (CO2-free) atmosphere, the OH form of this RG-AEM shows ˂ 7% degradation after 500 h at 80°C, with the extent of degradation being highly similar when measured using three different techniques (decrease in conductivity, decrease in ammonium content as measured using Raman spectroscopy, and decrease in ion-exchange capacity).

Item Type: Article
Divisions : Faculty of Engineering and Physical Sciences > Chemistry
Authors :
NameEmailORCID
Wang, Lianqinlianqin.wang@surrey.ac.uk
Bellini, Marco
Miller, Hamish Andrew
Varcoe, John R.J.Varcoe@surrey.ac.uk
Date : 16 July 2018
Funders : Engineering and Physical Sciences Research Council (EPSRC)
DOI : 10.1039/C8TA04783A
Copyright Disclaimer : © The Royal Society of Chemistry 2018. Open Access Article. Published on 16 July 2018. This article is licensed under a Creative Commons Attribution 3.0 Unported Licence.
Depositing User : Clive Harris
Date Deposited : 23 Jul 2018 09:06
Last Modified : 11 Jun 2019 13:23
URI: http://epubs.surrey.ac.uk/id/eprint/848763

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