Issue 7, 2013

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

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.

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

Supplementary files

Article information

Article type
Paper
Submitted
28 Sep 2012
Accepted
12 Dec 2012
First published
12 Dec 2012

J. Mater. Chem. A, 2013,1, 2578-2581

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

H. Oh, Y. Cho, W. H. Lee and H. Kim, J. Mater. Chem. A, 2013, 1, 2578 DOI: 10.1039/C2TA00492E

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