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An air-metal hydride battery using MmNi(3.6)Mn(0.4)Al(0.3)Co(0.7) in the anode and a perovskite in the cathode
KTH, School of Chemical Science and Engineering (CHE), Chemical Engineering and Technology, Chemical Technology.ORCID iD: 0000-0002-6212-4194
2010 (English)In: International journal of hydrogen energy, ISSN 0360-3199, Vol. 35, no 9, 4336-4341 p.Article in journal (Refereed) Published
Abstract [en]

Hydrogen storage alloy MmNi(3.6)Mn(0.4)Al(0.3)Co(0.7) (MH) was tested as anode material in a metal hydride-air cell. The cathode was a non-noble metal air electrode based on a mixture of perovskite and pyrolyzed macrocycles on carbon. Polarization and discharge capacities of the electrodes were measured and compared at 22 degrees C and 40 degrees C using air or oxygen at the cathode. Discharge capacity reaching 330 mAh/g MH with pure oxygen at 40 degrees C and 305 mAh/g MH with air at 22 degrees C were obtained. Power densities and/or energy densities were found to significantly depend on the increase of the electrode kinetics on both the ORR (oxygen reduction reaction) and HOR (hydrogen oxidation reaction). However, for air electrode, an increase of oxygen concentration by using pure oxygen gas plays a more important role than an 18 degrees C temperature increase. (C) 2010 Professor T. Nejat Veziroglu. Published by Elsevier Ltd. All rights reserved.

Place, publisher, year, edition, pages
2010. Vol. 35, no 9, 4336-4341 p.
Keyword [en]
Air electrode, Metal hydride electrode, Air-metal hydride battery, Rare earth metals
National Category
Physical Chemistry Subatomic Physics
URN: urn:nbn:se:kth:diva-27858DOI: 10.1016/j.ijhydene.2010.02.007ISI: 000277857600048ScopusID: 2-s2.0-77950340127OAI: diva2:385761
QC 20110112Available from: 2011-01-12 Created: 2011-01-03 Last updated: 2011-01-12Bibliographically approved

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Kiros, Yohannes
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