The structure of a 3 V Li{sub x}MnO{sub 2} cathode and its change upon electrochemical lithiation

Journal Article · Thu Oct 01 04:00:00 EDT 1998 · Journal of the Electrochemical Society

DOI:https://doi.org/10.1149/1.1838824· OSTI ID:659174

Levi, E; Zinigrad, E; Teller, H; Levi, M D; Aurbach, D ^[1]

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1. Bar-Ilan Univ., Ramat-Gan (Israel). Dept. of Chemistry

The crystal structure of Li{sub 0.33}MnO{sub 2} obtained by heat-treatment of a {gamma}-MnO{sub 2} and LiNO{sub 3} mixture (Li/Mn ratio 1:3, 370 C, 20 h), which is used as a 3 V cathode in rechargeable lithium batteries, is proposed as an ordered alternation of [1 x 2] and [1 x 1] channels. The simulation of this structure by the Rietveld method is in good agreement with the powder X-ray diffraction pattern of this material. It has been shown that the major difference between the structures of {gamma}-MnO{sub 2} and the thermal lithiated product is the ordering in the MnO{sub 6}-octahedra arrangement. This leads to the high reversibility and cyclability of this cathode material in rechargeable Li batteries.

• Sponsoring Organization: USDOE
• OSTI ID: 659174
• Journal Information: Journal of the Electrochemical Society, Journal Name: Journal of the Electrochemical Society Journal Issue: 10 Vol. 145; ISSN 0013-4651; ISSN JESOAN
• Country of Publication: United States
• Language: English

Related Subjects

25 ENERGY STORAGE
36 MATERIALS SCIENCE
CATHODES
CRYSTAL STRUCTURE
HEAT TREATMENTS
LITHIUM OXIDES
MANGANESE OXIDES
METAL-NONMETAL BATTERIES
MORPHOLOGICAL CHANGES