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Electrochemically produced graphene for microporous layers in fuel cells

Electrochemically produced graphene for microporous layers in fuel cells

Taheri Najafabadi, Amin ORCID: 0000-0002-5530-9510, Leeuwner, Magrieta J., Wilkinson, David P. and Gyenge, Előd L. (2016) Electrochemically produced graphene for microporous layers in fuel cells. ChemSusChem, 9 (13). pp. 1689-1697. ISSN 1864-5631 (Print), 1864-564X (Online) (doi:https://doi.org/10.1002/cssc.201600351)

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Abstract

The microporous layer (MPL) is a key cathodic component in proton exchange membrane fuel cells owing to its beneficial influence on two‐phase mass transfer. However, its performance is highly dependent on material properties such as morphology, porous structure, and electrical resistance. To improve water management and performance, electrochemically exfoliated graphene (EGN) microsheets are considered as an alternative to the conventional carbon black (CB) MPLs. The EGN‐based MPLs decrease the kinetic overpotential and the Ohmic potential loss, whereas the addition of CB to form a composite EGN+CB MPL improves the mass‐transport limiting current density drastically. This is reflected by increases of approximately 30 and 70 % in peak power densities at 100 % relative humidity (RH) compared with those for CB‐ and EGN‐only MPLs, respectively. The composite EGN+CB MPL also retains the superior performance at a cathode RH of 20 %, whereas the CB MPL shows significant performance loss.

Item Type: Article
Uncontrolled Keywords: graphene, fuel cells, electrochemistry, microporous layers, charactrization
Subjects: Q Science > QD Chemistry
T Technology > TA Engineering (General). Civil engineering (General)
Faculty / Department / Research Group: Faculty of Engineering & Science
Faculty of Engineering & Science > School of Engineering (ENN)
Last Modified: 19 Sep 2020 00:20
Selected for GREAT 2016: None
Selected for GREAT 2017: None
Selected for GREAT 2018: None
Selected for GREAT 2019: None
Selected for REF2021: REF 2
URI: http://gala.gre.ac.uk/id/eprint/27167

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