Cited 31 time in webofscience Cited 33 time in scopus

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
Authors
Kim, Y[Kim, Yong]Ketpang, K[Ketpang, Kriangsak]Jaritphun, S[Jaritphun, Shayapat]Park, JS[Park, Jun Seo]Shanmugam, S[Shanmugam, Sangaraju]
DGIST Authors
Kim, Y[Kim, Yong]; Ketpang, K[Ketpang, Kriangsak]; Shanmugam, S[Shanmugam, Sangaraju]
Issue Date
2015
Citation
Journal of Materials Chemistry A, 3(15), 8148-8155
Type
Article
Article Type
Article
Keywords
Composite MembranesElectrolytic ReductionElevated TemperatureFuel CellsGrapheneHydrogen BondsLow Relative HumiditiesMaximum Power DensityMembranesNafion Composite MembranesOhmic ContactsOxidesPhosphotungstic AcidPolyelectrolytesPolymer Electrolyte Fuel CellsPolyoxometalatesPristine MembranesProton-Exchange Membrane Fuel Cells (PEMFC)
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
Files:
Collection:
Energy Science and EngineeringAdvanced Energy Materials Laboratory1. Journal Articles


qrcode mendeley

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE