Identification of a new pseudo-binary hydroxide during calendar corrosion of La, Mg2Ni7-type hydrogen storage alloys for Nickel-Metal Hydride batteriesReportar como inadecuado




Identification of a new pseudo-binary hydroxide during calendar corrosion of La, Mg2Ni7-type hydrogen storage alloys for Nickel-Metal Hydride batteries - Descarga este documento en PDF. Documentación en PDF para descargar gratis. Disponible también para leer online.

* Corresponding author 1 ICMPE - Institut de Chimie et des Matériaux Paris-Est 2 LISE - Laboratoire Interfaces et Systèmes Electrochimiques

Abstract : To improve the performances of Nickel-Metal Hydride batteries, an important step is the understanding of the corrosion processes that take place in the electrode material. In particular, the present study focuses for the first time on the model La, Mg2Ni7 system. The calendar corrosion in 8.7 M KOH medium was investigated from 6 h to 16 weeks immersion. By a unique combination of structural and elemental characterisations, the corrosion products are evidenced in those systems. In particular, we demonstrate that Ni and Mg combine in a pseudo-binary hydroxide Mg1−xNixOH2 whereas La corrodes into nanoporous LaOH3 needles with inner hollow nanochannels.

Keywords : Corrosion Ni-MH batteries Raman micro spectroscopy TEM Combination of techniques





Autor: J. Monnier - H. Chen - Suzanne Joiret - J. Bourgon - M. Latroche -

Fuente: https://hal.archives-ouvertes.fr/



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