INIFTA 05425
INSTITUTO DE INVESTIGACIONES FISICO-QUIMICAS TEORICAS Y APLICADAS
Unidad Ejecutora - UE
artículos
Título:
Influence of the compaction pressure on the electrochemical impedance spectroscopy response of the AB5-type electrodes
Autor/es:
J. E. THOMAS; E. B. CASTRO; A. VISINTIN
Revista:
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
Editorial:
PERGAMON-ELSEVIER SCIENCE LTD
Referencias:
Año: 2009
ISSN:
0360-3199
Resumen:
AB5-type alloys are commercially used in electrodes for rechargeable batteries due to theirhigh capacity, good kinetics for the hydriding/dehydriding reactions and long useful life(cycling resistance).The aim of this work is to study, using electrochemical impedance spectroscopy, theinfluence of the preparation compaction pressure, on the performance of the electrode.The results show the effect of increasing compaction pressure on the interfacial and activeareas, and on the reduction of the contact resistance between particles.In this study a pressure range for optimal electrode behavior is determined. Theseresults agree with behavior predicted by the proposed physicochemical model and withexperimental results reported in previous works, using others electrochemical techniques.
