Synthesis and electrochemical characterization of oxysulfide spinel LiAl0.15Mn1.85O3.97S0.03 cathode materials for rechargeable batteries

Citation
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
Citations number
20
Categorie Soggetti
Physical Chemistry/Chemical Physics
Journal title
ELECTROCHIMICA ACTA
ISSN journal
00134686 → ACNP
Volume
46
Issue
4
Year of publication
2000
Pages
541 - 546
Database
ISI
SICI code
0013-4686(200012)46:4<541:SAECOO>2.0.ZU;2-D
Abstract
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.