High CO tolerance of new SiO2 doped phosphoric acid/polybenzimidazole polymer electrolyte membrane fuel cells at high temperatures of 200–250 °C

Yi Cheng; Jin Zhang; Shanfu Lu; Haohua Kuang; John Bradley; Roland De Marco; Aili David; Li Qingfeng; Cheng Qiang Cui; San Ping Jiang

doi:10.1016/j.ijhydene.2018.10.036

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High CO tolerance of new SiO2 doped phosphoric acid/polybenzimidazole polymer electrolyte membrane fuel cells at high temperatures of 200–250 °C

Journal article

Peer reviewed

High CO tolerance of new SiO2 doped phosphoric acid/polybenzimidazole polymer electrolyte membrane fuel cells at high temperatures of 200–250 °C

Yi Cheng, Jin Zhang, Shanfu Lu, Haohua Kuang, John Bradley, Roland De Marco, Aili David, Li Qingfeng, Cheng Qiang Cui and San Ping Jiang

International Journal of Hydrogen Energy, Vol.43(49), pp.22487-22499

2018

DOI: https://doi.org/10.1016/j.ijhydene.2018.10.036

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Abstract

polymer electrolyte membrane fuel cell

new SiO2 doped PA/PBI composite membrane

high temperature

CO tolerance

PA/Phosphosilicate nanoclusters

The high CO tolerance or resistance is critical for the practical application of proton exchange membrane fuel cells (PEMFCs) coupled with on board reformers for transportation applications due to the presence of high level of CO in the reformats. Increasing the operating temperature is most effective to enhance the CO tolerance of PEMFCs and therefore is of high technological significance. Here, we report a new PEMFC based on SiO2 nanoparticles doped phosphoric acid/polybenzimidazole (PA/PBI/SiO2) composite membranes for operation at temperatures higher than 200 °C. The phosphoric acid within the polymer matrix is stabilized by PA/phosphosilicate nanoclusters formed via prior polarization treatment of the membrane cells at 250 °C at a cell voltage of 0.6 V for 24 h, achieving a high proton conductivity and excellent stability at temperatures beyond that of conventional PA/PBI membranes. The proton conductivity of PA/PBI/SiO2 composite membranes is in the range of 0.029-0.041 S cm-1 and is stable at 250 °C. The PA/PBI/SiO2 composite membrane cell displays an exceptional CO tolerance with a negligible loss in performance at CO contents as high as 11.7% at 240 °C. The cell delivers a peak power density of 283 mW cm-2 and is stable at 240 °C for 100 h under a cell voltage of 0.6 V in 6.3% CO-contained H2 fuel under anhydrous conditions.

Details

Title: High CO tolerance of new SiO2 doped phosphoric acid/polybenzimidazole polymer electrolyte membrane fuel cells at high temperatures of 200–250 °C
Authors: Yi Cheng (Author) - Guangdong University of Technology, China
Jin Zhang (Author) - Curtin University
Shanfu Lu (Author) - Beihang University, China
Haohua Kuang (Author) - Curtin University
John Bradley (Author) - University of the Sunshine Coast
Roland De Marco (Author) - University of the Sunshine Coast
Aili David (Author) - Technical University of Denmark, Denmark
Li Qingfeng (Author) - Technical University of Denmark, Denmark
Cheng Qiang Cui (Author) - Guangdong University of Technology, China
San Ping Jiang (Author) - Guangdong University of Technology, China
Publication details: International Journal of Hydrogen Energy, Vol.43(49), pp.22487-22499
Publisher: Elsevier Ltd.
Date published: 2018
DOI: 10.1016/j.ijhydene.2018.10.036
ISSN: 0360-3199; 0360-3199
Grants: Single-atom catalysts for electrochemical carbon dioxide conversion, DP180100568, Australian Research Council (Australia, Canberra) - ARC
Smart utilisation of cobaltite based electrodes on solid oxide fuel cells, DP180100731, Australian Research Council (Australia, Canberra) - ARC
Organisation Unit: Office of the Deputy Vice-Chancellor (Research and Innovation)
Language: English
Record Identifier: 99450678602621
Output Type: Journal article

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