Synthesis of Nonstoichiometric Amorphous Mg-Based Alloy Electrodes by Mechanical Milling

Authors

L. Sun, University of Wollongong
Hua-Kun Liu, University of WollongongFollow
D. H. Bradhurst, University of Wollongong
S. X. Dou, University of WollongongFollow

RIS ID

5252

Publication Details

This article was originally published as Sun, L, Wang, GX, Liu, HK, Bradhurst, DH and Dou, SX, Synthesis of Nonstoichiometric Amorphous Mg-Based Alloy Electrodes by Mechanical Milling, Electrochemical and Solid-State Letters, 3(3), 2000, 121-124. Copyright The Electrochemical Society. Original journal available here.

Abstract

Nonstoichiometric amorphous Mg-Ni and Mg-Ni-V alloys were synthesized by mechanical milling the crystalline Mg2Ni alloy with Ni and/or V powders. All the nonstoichiometric amorphous Mg-based alloys result in Mg-based alloy electrodes with very high discharge capacities by comparison with crystalline Mg2Ni alloys. The results indicate that nonstoichiometric amorphous Mg-based alloys can be obtained either by increasing the Ni content, adding a range of other elements, or both, using a mechanical milling method. The nonstoichiometric Mg-based alloy electrodes studied have shown improved initial discharge capacities compared with the stoichiometric amorphous MgNi alloy. These results describe a method of achieving better Mg-based alloy electrodes with high discharge capacities and improved cycle life. The method enables a larger composition range to be achieved with a range of vanadium additions.