Absence of phase transformation at low temperature in Co-doped LiMn2O4 samples

Authors
Shen, CH Gundakaram, R Liu, RS Sheu, HS
Citation
Ch. Shen et al., Absence of phase transformation at low temperature in Co-doped LiMn2O4 samples, J CHEM S DA, (1), 2001, pp. 37-40
Citations number
19
Categorie Soggetti
Inorganic & Nuclear Chemistry
Journal title
JOURNAL OF THE CHEMICAL SOCIETY-DALTON TRANSACTIONS
ISSN journal
14727773 → ACNP
Issue
1
Year of publication
2001
Pages
37 - 40
Database
ISI
SICI code
1472-7773(2001):1<37:AOPTAL>2.0.ZU;2-T
Abstract
The phase transition in spinel LiMn2O4 was investigated using powder synchr otron radiation diffraction. A transition from cubic (Fd3m) to orthorhombic (Fddd) was observed around T=220 K. Increasing the average valence of Mn b y doping Co into the [Mn2O4] framework, LiMn1.9Co0.1O4, reduced the concent ration of Mn3+ ions, suppressed the Jahn-Teller distortion and the cubic ph ase was retained at low temperature.