Stack performance of phosphotungstic acid functionalized mesoporous silica (HPW-meso-silica) nanocomposite high temperature proton exchange membrane fuel cells

J Zeng; Benqin Jin; P K Shen; B He; Krystina Lamb; Roland De Marco; San Ping Jiang

doi:10.1016/j.ijhydene.2013.07.108

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Stack performance of phosphotungstic acid functionalized mesoporous silica (HPW-meso-silica) nanocomposite high temperature proton exchange membrane fuel cells

Journal article

Peer reviewed

Stack performance of phosphotungstic acid functionalized mesoporous silica (HPW-meso-silica) nanocomposite high temperature proton exchange membrane fuel cells

J Zeng, Benqin Jin, P K Shen, B He, Krystina Lamb, Roland De Marco and San Ping Jiang

International Journal of Hydrogen Energy, Vol.38(29), pp.12830-12837

2013

DOI: https://doi.org/10.1016/j.ijhydene.2013.07.108

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Abstract

proton exchange membrane fuel cells

phosphotungstic acid functionalized mesoporous silica

high temperature PEM

stack performance

startup and shut-down

In this paper, a series of short stacks with 2-cell, 6-cell and 10-cell employing phosphotungstic acid functionalized mesoporous silica (HPW-meso-silica) nanocomposite proton exchange membranes (PEMs) have been successfully fabricated, assembled and tested from room temperature to 200 °C. The effective surface area of the membrane was 20 cm2 and fabricated by a modified hot-pressing method. With the 2-cell stack, the open circuit voltage was 1.94 V and it was 5.01 V for the 6-cell stack, indicating a low gas permeability of the HPW-meso-silica membranes. With the 10-cell stack, a maximum power density of 74.4 W (equivalent to 372.1 mW cm-2) occurs at 150 °C in H2/O2, and the stack produces a near-constant power output of 31.6 W in H2/air at 150 °C without external humidification for 50 h. The short stack also displays good performance and stability during startup and shutdown cycling testing for 8 days at 150 °C in H2/air. Although the stack test period may be too short to extract definitive conclusions, the results are very promising, demonstrating the feasibility of the new inorganic HPW-meso-silica nanocomposites as PEMs for fuel cell stacks operating at elevated temperatures in the absence of external humidification.

Details

Title: Stack performance of phosphotungstic acid functionalized mesoporous silica (HPW-meso-silica) nanocomposite high temperature proton exchange membrane fuel cells
Authors: J Zeng (Author) - Curtin University
Benqin Jin (Author) - National University of Singapore, Singapore
P K Shen (Author) - Sun Yet-Sen University, China
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
San Ping Jiang (Author) - Curtin University
Publication details: International Journal of Hydrogen Energy, Vol.38(29), pp.12830-12837
Publisher: Elsevier Ltd.
Date published: 2013
DOI: 10.1016/j.ijhydene.2013.07.108
ISSN: 0360-3199
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: 99448980902621
Output Type: Journal article

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Collaboration types: Domestic collaboration; International collaboration
Web Of Science research areas: Chemistry, Physical; Electrochemistry; Energy & Fuels