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Title: The defect structure model in nonstoichiometric LiMn{sub 2}O{sub 4{minus}{delta}}

Abstract

Lithium manganese oxide LiMn{sub 2}O{sub 4} with a cubic spinel structure and the related spinel compounds (e.g., Li{sub 4}Mn{sub 5}O{sub 12}) have been examined as candidates for the cathode material of secondary lithium battery. The defect model of nonstoichiometric spinel LiMn{sub 2}O{sub 4{minus}{delta}} prepared under the control of oxygen partial pressures was determined by solid density measurement. There are two possible defect models. One is the oxygen deficient model, (Li){sub 8a}[Mn{sub 2}]{sub 16d}[O{sub 4{minus}{delta}}]{sub 32e} and the other the metal excess model, (Li){sub 8a}[Li{sub {delta}/(4{minus}{delta})}Mn{sub 2{delta}/(4{minus}{delta})}]{sub 16c}[Mn{sub 2}]{sub 16d}[O{sub 4}]{sub 32e} model. It is expected that the solid density of the former model would decrease with increasing {delta} and that of the latter would increase with increasing {delta}. Since the observed density of the nonstoichiometric spinel actually increased, the metal excess model was supported for the nonstoichiometry.

Authors:
; ; ;  [1]
  1. Tokyo Inst. of Tech., Meguro, Tokyo (Japan). Dept. of Chemical Engineering
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
509367
Resource Type:
Journal Article
Journal Name:
Journal of the Electrochemical Society
Additional Journal Information:
Journal Volume: 144; Journal Issue: 4; Other Information: PBD: Apr 1997
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 25 ENERGY STORAGE; LITHIUM OXIDES; MANGANESE OXIDES; CRYSTAL DEFECTS; MATHEMATICAL MODELS; CATHODES; METAL-NONMETAL BATTERIES

Citation Formats

Hosoya, Mamoru, Ikuta, Hiromasa, Uchida, Takashi, and Wakihara, Masataka. The defect structure model in nonstoichiometric LiMn{sub 2}O{sub 4{minus}{delta}}. United States: N. p., 1997. Web. doi:10.1149/1.1837550.
Hosoya, Mamoru, Ikuta, Hiromasa, Uchida, Takashi, & Wakihara, Masataka. The defect structure model in nonstoichiometric LiMn{sub 2}O{sub 4{minus}{delta}}. United States. doi:10.1149/1.1837550.
Hosoya, Mamoru, Ikuta, Hiromasa, Uchida, Takashi, and Wakihara, Masataka. Tue . "The defect structure model in nonstoichiometric LiMn{sub 2}O{sub 4{minus}{delta}}". United States. doi:10.1149/1.1837550.
@article{osti_509367,
title = {The defect structure model in nonstoichiometric LiMn{sub 2}O{sub 4{minus}{delta}}},
author = {Hosoya, Mamoru and Ikuta, Hiromasa and Uchida, Takashi and Wakihara, Masataka},
abstractNote = {Lithium manganese oxide LiMn{sub 2}O{sub 4} with a cubic spinel structure and the related spinel compounds (e.g., Li{sub 4}Mn{sub 5}O{sub 12}) have been examined as candidates for the cathode material of secondary lithium battery. The defect model of nonstoichiometric spinel LiMn{sub 2}O{sub 4{minus}{delta}} prepared under the control of oxygen partial pressures was determined by solid density measurement. There are two possible defect models. One is the oxygen deficient model, (Li){sub 8a}[Mn{sub 2}]{sub 16d}[O{sub 4{minus}{delta}}]{sub 32e} and the other the metal excess model, (Li){sub 8a}[Li{sub {delta}/(4{minus}{delta})}Mn{sub 2{delta}/(4{minus}{delta})}]{sub 16c}[Mn{sub 2}]{sub 16d}[O{sub 4}]{sub 32e} model. It is expected that the solid density of the former model would decrease with increasing {delta} and that of the latter would increase with increasing {delta}. Since the observed density of the nonstoichiometric spinel actually increased, the metal excess model was supported for the nonstoichiometry.},
doi = {10.1149/1.1837550},
journal = {Journal of the Electrochemical Society},
number = 4,
volume = 144,
place = {United States},
year = {1997},
month = {4}
}