Layered ( 1 − x − y ) LiNi1 / 2Mn1 / 2 O 2 ⋅ xLi [ Li1 / 3Mn2 / 3 ] O 2 ⋅ yLiCoO2 ( 0 ⩽ x = y ⩽ 0.3 and x + y = 0.5 ) Cathode Materials

Abstract

An exploration of new cathode materials along the two lines having the nominal compositions of and was performed in the phase diagram of by a simple solid-state reaction. XRD results identified that all materials are pure phases with layered structure, indicating good structural compatibility between three layered compounds, and and contents in these electrode materials presented important effects on structure and electrochemical properties. Our results demonstrated that the suitable structural integration of and components into structure is a practicable way to prepare new electrode materials with the desired electrochemical performances even via a simple solid-state reaction. Among the materials investigated in this work, a reversible capacity of 180-200 mAh/g was obtained for the materials with and excellent cycling performance was observed with a large value in the series of © 2004 The Electrochemical Society. All rights reserved.