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    Rights statement: This is the author’s version of a work that was accepted for publication in Electrochimica Acta. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Electrochimica Acta, 251, 2017 DOI: 10.1016/j.electacta.2017.08.068

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Enhanced performance based on hybrid cathode backing layer using a biomass derived activated carbon framework for methanol fuel cells

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<mark>Journal publication date</mark>10/10/2017
<mark>Journal</mark>Electrochimica Acta
Volume251
Number of pages9
Pages (from-to)51-59
Publication StatusPublished
Early online date18/08/17
<mark>Original language</mark>English

Abstract

Direct methanol fuel cells (DMFCs) suffer from performance reduction due to mass transport losses incurred at high current regions. In this work, we report the use of activated carbon (AC), prepared from factory waste-tea, as cathode microporous layer in the membrane electrode assembly (MEA) of a DMFC, alleviating this mass transport effect. This biomass based AC framework, when tested under fuel cell operating conditions provided 0.25 V @ 300 mA cm−2, enhancing cell performance by 33% over standard electrodes at 70 °C. During uninterrupted durability testing, this electrode displayed exceptional stability in mass transport dominated region, with loss of 15 mV day−1, compared to 25 mV day−1 loss for the standard. Sample and electrode characterization measurements reveal that pore size distribution/particle size characteristics coupled with hydrophobic nature of the synthesized activated carbon, contributed to the performance improvement.

Bibliographic note

This is the author’s version of a work that was accepted for publication in Electrochimica Acta. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Electrochimica Acta, 251, 2017 DOI: 10.1016/j.electacta.2017.08.068