Anhydrous phosphoric acid functionalized sintered mesoporous silica nanocomposite proton exchange membranes for fuel cells

J Zeng; B He; Krystina Lamb; Roland De Marco; P K Shen

doi:10.1021/am403479t

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Anhydrous phosphoric acid functionalized sintered mesoporous silica nanocomposite proton exchange membranes for fuel cells

Journal article

Peer reviewed

Anhydrous phosphoric acid functionalized sintered mesoporous silica nanocomposite proton exchange membranes for fuel cells

J Zeng, B He, Krystina Lamb, Roland De Marco and P K Shen

ACS Applied Materials and Interfaces, Vol.5(21), pp.11240-11248

2013

DOI: https://doi.org/10.1021/am403479t

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Abstract

sintered mesoporous silica

phosphoric acid

high-temperature proton exchange membrane

fuel cells

A novel inorganic proton exchange membrane based on phosphoric acid (PA)-functionalized sintered mesoporous silica, PA-meso-silica, has been developed and investigated. After sintering at 650 °C, the meso-silica powder forms a dense membrane with a robust and ordered mesoporous structure, which is critical for retention of PA and water within the porous material. The PA-meso-silica membrane achieved a high proton conductivity of 5 × 10-3 to 5 × 10-2 S cm-1 in a temperature range of 80-220 °C, which is between 1 and 2 orders of magnitudes higher than a typical membrane Nafion 117 or polybenzimidazole (PBI)/PA in the absence of external humidification. Furthermore, the PA-meso-silica membranes exhibited good chemical stability along with high performance at elevated temperatures, producing a peak power density of 632 mW cm-2 using a H2 fuel at 190 °C in the absence of external humidification. The high membrane proton conductivity and excellent fuel cell performance demonstrate the utility of PA-meso-silica as a new class of inorganic proton exchange membranes for use in the high-temperature proton exchange membrane fuel cells (PEMFCs).

Details

Title: Anhydrous phosphoric acid functionalized sintered mesoporous silica nanocomposite proton exchange membranes for fuel cells
Authors: J Zeng (Author) - Curtin University
B He (Author) - Curtin University
Krystina Lamb (Author) - University of the Sunshine Coast - Faculty of Science, Health, Education and Engineering
Roland De Marco (Author) - University of the Sunshine Coast
P K Shen (Author) - Curtin University
Publication details: ACS Applied Materials and Interfaces, Vol.5(21), pp.11240-11248
Publisher: American Chemical Society
Date published: 2013
DOI: 10.1021/am403479t
ISSN: 1944-8244
Organisation Unit: School of Science and Engineering - Legacy; University of the Sunshine Coast, Queensland; Office of the Deputy Vice-Chancellor (Research and Innovation)
Language: English
Record Identifier: 99448610002621
Output Type: Journal article

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Collaboration types: Domestic collaboration; International collaboration
Web Of Science research areas: Materials Science, Multidisciplinary; Nanoscience & Nanotechnology