Cycling behavior of oxysulfide spinel LiCr0.19Mn1.81O3.98S0.02 cathode material which shows no capacity loss in the 3-V region

Abstract

A new oxysulfide spinel LiCr0.19Mn1.81O3.98S0.02 with well-developed octahedral structure is synthesized by a sol-gel method using glycolic acid as a chelating agent. The LiCr0.19Mn1.81O3.98S0.02 electrode shows no capacity loss in the 3- and 4-V region. This behavior is investigated by X-ray diffraction (XRD). The substitution of S for O in LiMn2O4,Ol stabilizes the structural integrity of the spinel host, which in turn increases the electrochemical cycleability. (C) 2001 Elsevier Science B.V. All rights reserved.