INIFTA 05425
INSTITUTO DE INVESTIGACIONES FISICO-QUIMICAS TEORICAS Y APLICADAS
Unidad Ejecutora - UE
artículos
Título:
A study on ZrCrNiPtx alloys as negative electrode components for NiMH batteries
Autor/es:
F.C. RUIZ, H.A. PERETTI, A. VISINTIN, W.E. TRIACA
Revista:
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
Editorial:
PERGAMON-ELSEVIER SCIENCE LTD
Referencias:
Año: 2011 vol. 36 p. 901 - 906
ISSN:
0360-3199
Resumen:
The effect of the addition of Pt on the electrochemical characteristics of AB2 type ZrCrNialloys as negative electrode materials for nickelemetal-hydride (NieMH) batteries isstudied. Electrochemical characteristics of the alloys like as discharge capacity, activationbehavior, high rate dischargeability (HRD) and electrochemical impedance spectroscopy(EIS) were analyzed. The resulting ZrCrNiPtx alloys (x ¼ 0.05 and 0.1 corresponding to 5 wt.% and 10 wt. % respectively) retain the crystalline structure related to hexagonal C14 Lavesphases, on both as-melted and annealed samples. Alloy samples containing Pt are found tohave a similar activation behavior to the as-melted alloy without Pt. However, this characteristicis improved in annealed samples containing Pt. The discharge capacity of theZrCrNiPtx alloys is higher than the discharge capacity corresponding to ZrCrNi alloys,except in the case of as-melted ZrCrNiPt0.1 alloy. The addition of Pt also improves significantlythe high rate dischargeability, maintaining the capacity values in a wide range ofdischarge current.
