Mechanochemical synthesis of LiNiO2

The mechanochemical process has been used to synthesize precursors and evaluate their efficacy in generating the layered structure of LiNiO2 at lower heat treatment temperatures. A comprehensive study of the as-milled precursor has been conducted using simultaneous TG/DTA. It is observed that the milling process is efficient in generating a disordered LiNiO2 using Li2O2 and NiO as the starting materials. The transformation of the disordered LiNiO2 to the ordered form of LiNiO2 however requires a minimum temperature of 700 degreesC. This observation suggests that the formation temperature of well-ordered LiNiO2 (similar to8% disorder) is limited not only by the chemical reaction kinetics of the starting materials but also the kinetics of ordering of Li and Ni in LiNiO2. (C) 2004 Elsevier B.V. All rights reserved.