Modification of electrodes using Al2O3 to reduce phosphoric acid loss and increase the performance of high-temperature proton exchange membrane fuel cells
- Modification of electrodes using Al2O3 to reduce phosphoric acid loss and increase the performance of high-temperature proton exchange membrane fuel cells
- 오형석; 조영익; 이웅희; 김한성
- Issue Date
- Journal of materials chemistry. A, Materials for energy and sustainability
- VOL 1, NO 7-2581
- 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.
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