Modification of electrodes using Al2O3 to reduce phosphoric acid loss and increase the performance of high-temperature proton exchange membrane fuel cells

Title
Modification of electrodes using Al2O3 to reduce phosphoric acid loss and increase the performance of high-temperature proton exchange membrane fuel cells
Authors
오형석조영익이웅희김한성
Issue Date
2013-02
Publisher
Journal of materials chemistry. A, Materials for energy and sustainability
Citation
VOL 1, NO 7-2581
Abstract
The addition of a small amount of Al2O3 (6 wt%) to the catalyst layer of high temperature-polymer electrolyte membrane fuel cells (HT-PEMFCs) using phosphoric acid-doped membranes was proved to be an effective way to increase durability and performance. It was confirmed from the XRD study that Al2O3 reacts with phosphoric acid diffusing from the membrane to the electrode and produces aluminum dihydrophosphate (Al(H2PO4)(3)), which has proton conductivity. As a result, the formation of Al(H2PO4)(3) not only reduces the loss of phosphoric acid and the resistance in fuel cells but also enhances the electrochemical surface area of catalysts.
URI
http://pubs.kist.re.kr/handle/201004/67016
ISSN
2050-7488
Appears in Collections:
KIST Publication > Article
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