Proton exchange membrane with hydrophilic capillaries for elevated temperature PEM fuel cells

Novel water-retention proton exchange membrane of Nafion-phosphotungstic acid/mesoporous silica with hydrophilic capillaries has been fabricated to improve the elevated temperature performance of the PEM fuel cells. Due to the hydrophilic capillarity of the HPW/meso-SiO 2 mesoporous structure, the N...

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Bibliographic Details
Published in:Electrochemistry communications 2009, Vol.11 (1), p.71-74
Main Authors: Yan, Xue-Min, Mei, Ping, Mi, Yuanzhu, Gao, Lin, Qin, Shaoxiong
Format: Article
Language:English
Subjects:
Applied sciences
Elevated temperature
Energy
Energy. Thermal use of fuels
Equipments for energy generation and conversion: thermal, electrical, mechanical energy, etc
Exact sciences and technology
Fuel cells
HPW/meso-SiO 2
PEM fuel cell
Water retention
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Summary:Novel water-retention proton exchange membrane of Nafion-phosphotungstic acid/mesoporous silica with hydrophilic capillaries has been fabricated to improve the elevated temperature performance of the PEM fuel cells. Due to the hydrophilic capillarity of the HPW/meso-SiO 2 mesoporous structure, the Nafion-HPW/meso-SiO 2 composite membrane retained 23.7 wt% of water after being dried in 100 °C for 2 h and then exposed in 25 RH% gas for 2 h. As a result, under the condition of elevated temperature of 120 °C and low humidity of 25 RH%, the Nafion-HPW/meso-SiO 2 composite membrane showed a steady performance.
ISSN:1388-2481
1873-1902
DOI:10.1016/j.elecom.2008.10.040