NANOCRYSTALLINE Mg BASED ALLOYS OBTAINED BY MECHANICAL ALLOYING AS PRECURSORS FOR HIGH-CAPACITY NEGATIVE ELECTRODES IN RECHARGEABLE Ni/MH BATTERIES

摘要

Nanocrystalline and nanocrystalline/amorphous (nc/a) Mg based alloys with different compositions were obtained by ball milling. Microstructure and morphology of the alloy powders were determined by X-ray diffration (XRD) and scanning electron microscopy (SEM). The maximum electrochemical discharge capacity, measured with an electrode prepared from an MgNi alloy of in strong alkaline solution (6M KOH), was 382 mAhg~(-1).