Preparation of Lithium Cobalt Oxide by LiCl-Flux Method for Lithium Rechargeable Batteries

Abstract

A new type of lithium cobalt oxide was prepared by a method at . The sample consists of polyhedron crystals between in size. X‐ray diffraction analysis showed a layered structure with a remarkably high (003) peak intensity and relatively weak (101), (104) peak intensities. The intensity ratios of the (003) peak relative to (104) and (101) peaks were 24 and 45, respectively. The first‐cycle discharge capacity of a /lithium cobalt oxide cell in the first cycle was between , and discharge coulombic efficiencies were above 98% for every discharge/charge repetition from the first to the seventh cycles. The discharge capacity was close to the theoretical value, and the discharge/charge efficiency was higher than those for samples obtained by solid‐state reaction. ©1998 The Electrochemical Society