Preparation of Lithium Manganese Oxides in Molten Alkali Hydroxides and Their Electrochemical Properties

摘要

Lithium manganese oxides, which are used as cathode materials in lithium rechargeable batteries, were prepared by using molten alkali hydroxides, and the electrochemical properties of these oxide powders were evaluated. The composition of alkali hydroxides and heating period altered the composition and crystal structure of the powders, with the shorter period being the more favorable in this preparation method. The cathode performance of the batteries prepared using these powders was evaluated as satisfactory. This method was also applied to the preparation of doped lithium manganese oxide powders with a composition of LiMn_(0.9)M_(0.1)O_2(M: Co, Ni, Cr, Al, Ag, Fe), which also showed promising properties for use as cathode materials in rechargeable lithium batteries. These results indicated that this simple and quick method was promising for the preparation of cathode powders.