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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
Stockholm University, Faculty of Science, Department of Materials and Environmental Chemistry (MMK).
Stockholm University, Faculty of Science, Department of Materials and Environmental Chemistry (MMK).
2010 (English)In: International journal of hydrogen energy, ISSN 0360-3199, E-ISSN 1879-3487, 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.

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
Chemical Sciences
Identifiers
URN: urn:nbn:se:su:diva-49922DOI: 10.1016/j.ijhydene.2010.02.007ISI: 000277857600048OAI: oai:DiVA.org:su-49922DiVA: diva2:380039
Note
authorCount :3Available from: 2010-12-20 Created: 2010-12-20 Last updated: 2017-12-11Bibliographically approved

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