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Improvement in Power Density of Rechargeable Air Battery using Hydrogen Storage Alloy

Published online by Cambridge University Press:  31 January 2011

Masatsugu Morimitsu ,
Takahito Kondo ,
Naoki Osada  and
Koji Takano
Masatsugu Morimitsu
Affiliation:
[email protected], Doshisha University, Department of Environmental Systems Science, Kyo-tanabe, Japan
Takahito Kondo
Affiliation:
[email protected], Doshisha University, Kyo-tanabe, Japan
Naoki Osada
Affiliation:
[email protected], Doshisha University, Kyo-tanabe, Kyoto, Japan
Koji Takano
Affiliation:
[email protected], Kyushu Electric Power Co., Inc., Hakata, Fukuoka, Japan
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Abstract

A novel class of secondary battery comprising MH and air electrodes was developed for potential uses in high power density and high energy density applications such as electric or hybrid vehicles and power storage units supporting fuel cell and solar power systems. The air electrode consisted of nickel-based gas diffusion electrode using Ir2Bi2O7-z as oxygen evolution and reduction catalyst. Coin-type of cells using alkaline solutions as electrolyte were designed and fabricated, and the charge-discharge behaviors were evaluated with constant current operation. The discharge voltage and power density were improved by using a thin film membrane, in which the electrolyte was impregnated, between the air and MH electrodes, and the maximum power density was comparable to that of commercially available Ni-MH secondary battery. The MH utilization and the current efficiency of a charge-discharge cycle were found to be more than 90%.

Keywords

energy storageenergy generationwater
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1216: Symposium W – Hydrogen Storage Materials , 2009 , 1216-W08-42
Copyright
Copyright © Materials Research Society 2010

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