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A polyoxometalate coupled graphene oxide-Nafion composite membrane for fuel cells operating at low relative humidity

Title
A polyoxometalate coupled graphene oxide-Nafion composite membrane for fuel cells operating at low relative humidity
Author(s)
Kim, YongKetpang, KriangsakJaritphun, ShayapatPark, Jun SeoShanmugam, Sangaraju
Issued Date
2015
Citation
Journal of Materials Chemistry A, v.3, no.15, pp.8148 - 8155
Type
Article
Keywords
NANOCOMPOSITE MEMBRANEPROTON CONDUCTIVITYWATER-RETENTIONTRANSPORTACIDFILLER
ISSN
2050-7488
Abstract
Polymer electrolyte fuel cells operating at elevated temperature and low relative humidity (RH) have been investigated by utilizing a polyoxometalate coupled graphene oxide-Nafion membrane. A phosphotungstic acid (PW) coupled graphene oxide-Nafion (Nafion/PW-mGO) membrane showed enhanced proton conductivity compared with pristine and recast Nafion membranes. The Nafion/PW-mGO hybrid membrane exhibited a maximum power density of 841 mW cm-2, whereas the pristine Nafion membrane showed a power density of 210 mW cm-2 operated at 80 °C under 20% RH. In comparison, our hybrid membrane showed a 4-fold higher maximum fuel cell power density when operated at 80 °C under 20% RH, than that of a state-of-the-art pristine membrane (Nafion-212). The remarkably enhanced performance of the Nafion/PW-mGO composite membrane was mainly attributed to the reduction of ohmic resistance by the hygroscopic solid acids, which can retain water in their framework through hydrogen bonding with protons at elevated temperatures and facilitates proton transport through the membrane. © The Royal Society of Chemistry 2015.
URI
http://hdl.handle.net/20.500.11750/2627
DOI
10.1039/c5ta00182j
Publisher
Royal Society of Chemistry
Related Researcher
  • 상가라쥬샨무감 Shanmugam, Sangaraju
  • Research Interests Electrocatalysts for fuel cells; water splitting; metal-air batteries; Polymer electrolyte membranes for fuel cells; flow batteries; Hydrogen generation and utilization
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Appears in Collections:
Department of Energy Science and Engineering Advanced Energy Materials Laboratory 1. Journal Articles

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