INIFTA 05425
INSTITUTO DE INVESTIGACIONES FISICO-QUIMICAS TEORICAS Y APLICADAS
Unidad Ejecutora - UE
artículos
Título:
Electrochemical characterization of AB2 alloys used for negative electrodes in Ni/MH
Autor/es:
RUIZ F.C., CASTRO E.B., REAL S.G., PERETTI H.A., VISINTIN A., TRIACA W.E.
Revista:
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
Editorial:
Elsevier
Referencias:
Año: 2008 vol. 33 p. 3576 - 3680
ISSN:
0360-3199
Resumen:
The hydrogen storage AB2-type and AB5-type alloys have been successfully used as
components of the negative electrode of Ni/MH batteries, in replacement of the previously
employed cadmium electrode. In previous works on AB2-type ZrCrNi alloy prepared by arc
furnace it was shown that the as-melted material had better electrochemical characteristics
as compared to the annealed one. This effect was ascribed to the presence of
secondary phases ZrxNiy formed during solidification of the melt. In this work the
electrochemical characteristics of ball milled mixtures of annealed ZrCrNi alloy with
powders of the phases Zr7Ni10, Zr8Ni21 and Zr9Ni11 are studied, resulting that the main
secondary phase responsible for the properties improvement is the Zr8Ni21 alloy. The2-type and AB5-type alloys have been successfully used as
components of the negative electrode of Ni/MH batteries, in replacement of the previously
employed cadmium electrode. In previous works on AB2-type ZrCrNi alloy prepared by arc
furnace it was shown that the as-melted material had better electrochemical characteristics
as compared to the annealed one. This effect was ascribed to the presence of
secondary phases ZrxNiy formed during solidification of the melt. In this work the
electrochemical characteristics of ball milled mixtures of annealed ZrCrNi alloy with
powders of the phases Zr7Ni10, Zr8Ni21 and Zr9Ni11 are studied, resulting that the main
secondary phase responsible for the properties improvement is the Zr8Ni21 alloy. The2-type ZrCrNi alloy prepared by arc
furnace it was shown that the as-melted material had better electrochemical characteristics
as compared to the annealed one. This effect was ascribed to the presence of
secondary phases ZrxNiy formed during solidification of the melt. In this work the
electrochemical characteristics of ball milled mixtures of annealed ZrCrNi alloy with
powders of the phases Zr7Ni10, Zr8Ni21 and Zr9Ni11 are studied, resulting that the main
secondary phase responsible for the properties improvement is the Zr8Ni21 alloy. ThexNiy formed during solidification of the melt. In this work the
electrochemical characteristics of ball milled mixtures of annealed ZrCrNi alloy with
powders of the phases Zr7Ni10, Zr8Ni21 and Zr9Ni11 are studied, resulting that the main
secondary phase responsible for the properties improvement is the Zr8Ni21 alloy. The7Ni10, Zr8Ni21 and Zr9Ni11 are studied, resulting that the main
secondary phase responsible for the properties improvement is the Zr8Ni21 alloy. The8Ni21 alloy. The
electrochemical characteristics of the individual secondary phases Z7Ni10, Zr8Ni21 and Zr9Ni11 are also investigated.
