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Gas Diffusion-Type Oxygen Electrode Using Perovskite-Type Oxides for Metal-Air Batteries

Published online by Cambridge University Press:  15 February 2011

Takeo Hyodo ,
Norio Miura  and
Noboru Yamazoe
Takeo Hyodo
Affiliation:
Kyushu University, Graduate School of Engineering Sciences, Kasuga-koen 6-1, Kasuga-shi, Fukuoka 816, Japan
Norio Miura
Affiliation:
Kyushu University, Graduate School of Engineering Sciences, Kasuga-koen 6-1, Kasuga-shi, Fukuoka 816, Japan
Noboru Yamazoe
Affiliation:
Kyushu University, Graduate School of Engineering Sciences, Kasuga-koen 6-1, Kasuga-shi, Fukuoka 816, Japan
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Abstract

In order to develop an air cathode of metal-air batteries, oxygen reduction behavior of gas diffusion-type carbon electrodes loaded with perovskite-type oxides, Lai-xA'xFe03 (A'=Ca, Sr, Ba, 0<x<1.0), was examined in 8 M KOH at 60 °C. Among the oxide catalysts tested, La0.5Sr0.5Fe03 (specific surface area : 21.5 m2.g−1) gave the highest electrode performance. On the basis of electrode reaction kinetics, H2O2 decomposition rates, and temperature programed desorption of oxygen, it was concluded that such a performance was attributable to the active sites of the oxide for the direct 4-electron reduction of oxygen. Moreover, the electrode using Lao.5Sro.5FeO3 was found to be rather stable in a short-term operation for 90 h at 300 mA-cm−2.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 393: Symposium W – Materials for Electrochemical Energy Storage and Conversion , 1995 , 79
Copyright
Copyright © Materials Research Society 1995

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References

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