Yk. Sun et al., Synthesis and electrochemical characterization of oxysulfide spinel LiAl0.15Mn1.85O3.97S0.03 cathode materials for rechargeable batteries, ELECTR ACT, 46(4), 2000, pp. 541-546
A new oxysulfide spinel, LiAl0.15Mn1.85O3.97S0.03 with well-developed octah
edral structure was synthesized by a sol-gel method using glycolic acid as
a chelating agent. The electrochemical performance of the oxysulfide was st
udied compared with those of S-doped spinel, LiMn2O3.98S0.02 and Al-doped s
pinel LiAl0.24Mn1.76O4. The LiAl0.15Mn1.85O3.97S0.03 electrode shows no cap
acity loss in the 3 and 4 V region. The origin of no capacity loss of the e
lectrode was investigated by XRD and HRTEM. The substitution of S for O in
LiMn2O4 stabilized the structural integrity of the spinel host, which in tu
rn increased electrochemical cyclability. (C) 2000 Elsevier Science Ltd. Al
l rights reserved.