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Issue 38, 2017
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Sulfonated polyether ether ketone/strontium zirconite@TiO2 nanocomposite membranes for direct methanol fuel cells

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Abstract

Nanocomposite membranes consisting of sulfonated perovskite-type strontium zirconite (sSrZrO3) and sSrZrO3@TiO2 nanofillers integrated into a sulfonated polyether ether ketone (SPEEK) matrix have been explored as ion-exchange membranes for direct methanol fuel cells (DMFCs). The perovskite fillers improved the thermal and oxidative stabilities of the SPEEK membranes. Due to the hygroscopic characteristics of sSrZrO3@TiO2, the SPEEK/sSrZrO3@TiO2 nanocomposite membrane adsorbed a large amount of water, which facilitated the dissolution of acid moieties and led to enhanced proton conductivity. The narrower channels formed in the SPEEK/sSrZrO3@TiO2 nanocomposite via the uniform distribution of sSrZrO3@TiO2 fillers in the SPEEK matrix restricted fuel transport and improved the selectivity ratio of proton conductivity to methanol permeation. A DMFC constructed with the SPEEK/sSrZrO3@TiO2 membrane offered superior power and current densities of 140 mW cm−2 and 639 mA cm−2, respectively, at 80 °C, compared to those obtained with a Nafion 117 membrane.

Graphical abstract: Sulfonated polyether ether ketone/strontium zirconite@TiO2 nanocomposite membranes for direct methanol fuel cells

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Publication details

The article was received on 17 Jul 2017, accepted on 04 Sep 2017 and first published on 04 Sep 2017


Article type: Paper
DOI: 10.1039/C7TA06258C
Citation: J. Mater. Chem. A, 2017,5, 20497-20504
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    Sulfonated polyether ether ketone/strontium zirconite@TiO2 nanocomposite membranes for direct methanol fuel cells

    G. Gnana kumar and A. Manthiram, J. Mater. Chem. A, 2017, 5, 20497
    DOI: 10.1039/C7TA06258C

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