Overcoming Jahn-Teller distortion of oxysulfide spinel materials for lithium secondary batteries

Authors
Sun, YK Jeon, YS
Citation
Yk. Sun et Ys. Jeon, Overcoming Jahn-Teller distortion of oxysulfide spinel materials for lithium secondary batteries, J MAT CHEM, 9(12), 1999, pp. 3147-3150
Citations number
19
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science","Material Science & Engineering
Journal title
JOURNAL OF MATERIALS CHEMISTRY
ISSN journal
09599428 → ACNP
Volume
9
Issue
12
Year of publication
1999
Pages
3147 - 3150
Database
ISI
SICI code
0959-9428(1999)9:12<3147:OJDOOS>2.0.ZU;2-P
Abstract
A new sulfur-doped spinel material, LiAl0.24Mn1.76O3.98S0.02 with submicron dimensions and well developed octahedron morphology is synthesized by a so l-gel method using glycolic acid as a chelating agent. LiAl0.24Mn1.76O3.98S 0.02 electrodes cycled in various voltage regions were characterized by mea ns of charge-discharge experiments and XRD to investigate their structural integrity. The material overcomes Jahn-Teller distortion in all voltage ope rating regions. Our synthesized material shows excellent cyclability and de livers capacities of 215 mA h g(-1) over the 3 and 4 V regions (4.3-2.4 V).