Microstructure and electrochemical characteristics of LaPrMgALMnCoNi hydrogen storage alloys for nickel-metal hydride batteries
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The effect of the substitution of La with Pr on the microstructure and some
electrochemical properties of La0.7-xPrxMg0.3Al0.3Mn0.4Co0.5Ni3.8 (x=0.0, 0.1, 0.3, 0.5, and 0.7) ingot
alloys as powder electrode was studied in this paper. XDR and SEM (+EDX) analyses revealed that
the as-cast alloys consist mainly of similar LaNi5 and (La,Pr)Mg2Ni9 phases. With the increase in Pr
content, both the relative abundance of the phases and microstructure changed. The electrochemical
studies showed that the maximum discharge capacity decreased with the increase in Pr content. For
the alloy without Pr, the self-discharge studies revealed a major stability of the hydride until the
first 984 hours (41 days) of the charge/discharge cycles. The high-rate dischargeability of this alloy
electrode showed the best result HRD=88% at a discharge current density of Id=250 mA/g.
Como referenciar
ZARPELON, LIA M.C.; FARIA JUNIOR, RUBENS N. Microstructure and electrochemical characteristics of LaPrMgALMnCoNi hydrogen storage alloys for nickel-metal hydride batteries. Materials Science Forum, v. 802, p. 421-426, 2014. DOI: 10.4028/www.scientific.net/MSF.802.421. Disponível em: http://repositorio.ipen.br/handle/123456789/23483. Acesso em: 30 Dec 2025.
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.