Effect of hydrogen decrepitation pressure on the particle size of rare earth based alloys for Ni-MH battery production
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Materials Science Forum
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This paper presents the results obtained from the hydrogenation and decrepitation of
three LaNi-based alloys, La0.7Mg0.3Al0.3Mn0.4Co0.5Ni3.8, La0.7Mg0.3Al0.3Mn0.4Cu0.5Ni3.8 and
La0.7Mg0.3Al0.3Mn0.4Sn0.5Ni3.8, in the as-cast condition. The procedure for decrepitating the alloys to
be used in the negative electrode of the batteries was carried out using a combination of various
hydrogen pressures (2-9 bar) at room temperature. At 2 bar of H2 it was revealed that Co, Cu and Sn
have influence on the microstructures of the hydrogenated alloys and on the efficiency of hydrogen
decrepitation. None of these alloys required thermal heating to activate and start the hydrogen
absorption process. The decrepitated materials were characterized by scanning electron microscopy
(SEM). The electrochemical measurements were performed using the tested negative electrode
between two Ni(OH)2 electrodes as a battery cell.
Como referenciar
SOARES, EDSON P.; CASINI, JULIO C.S.; VIEIRA, LIGIA S.; SILVA, FRANKS M.; FARIA, RUBENS N. de; TAKIISHI, HIDETOSHI. Effect of hydrogen decrepitation pressure on the particle size of rare earth based alloys for Ni-MH battery production. Materials Science Forum, v. 930, p. 637-642, 2018. DOI: 10.4028/www.scientific.net/MSF.930.637. Disponível em: http://repositorio.ipen.br/handle/123456789/29349. Acesso em: 20 Mar 2026.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.