Enhancement of mass transport in fuel cells using three-dimensional graphene foam as flow field

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Title
Enhancement of mass transport in fuel cells using three-dimensional graphene foam as flow field
Author(s)
Ji Eun Park; Jongkoo Lim; Sungjun Kim; Insoo Choi; Chi-Yeong Ahn; Wonchan Hwang; Myung Su Lim; Yong-Hun Cho; Yung-Eun Sung
Publication Date
2018-03
Journal
ELECTROCHIMICA ACTA, v.265, no., pp.488 - 496
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Abstract
Graphene foam is a three-dimensional graphene-based material with interconnected macropores and it combines the advantage of graphene and structural characteristics of metal foam. Various kinds of metal foam have been developed as flow fields because their high porosity distributes reactants in an entire area and removes generated water. However, metal foam is highly susceptible to corrosion under the operating conditions of polymer-electrolyte-membrane fuel cells. In this work, we proposed using graphene foam as a flow field to investigate its effect on enhancing mass transport of reactants and products. Single-cell tests of the graphene-foam flow field showed the enhancement of mass transport, which led to increased performance at high current densities. Measurements of the oxygen gain (i.e., the difference in voltage under O2 and air atmospheres), electrochemical impedance spectra, and simulation results also revealed that the graphene-foam membrane-electrode assembly (MEA) exhibited lower mass-transport resistance than a conventional MEA because graphene foam is advantageous for the mass transport of reactants and water. © 2018 Elsevier Lt
URI
https://pr.ibs.re.kr/handle/8788114/4605
ISSN
0013-4686
Appears in Collections:
Center for Nanoparticle Research(나노입자 연구단) > Journal Papers (저널논문)
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