Lithium extraction from orthorhombic lithium manganese oxide and the phase transformation to spinel

Orthorhombic LiMnO 2 products, synthesised by the reaction of γ-MnO 2 and LiOH in argon at 600–620°C using carbon as a reducing agent, have been evaluated as electrode materials in lithium cells. Products that contained a minor proportion of a lithiated spinel phase showed greater electrochemical ac...

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Bibliographic Details
Published in:Materials research bulletin 1993-12, Vol.28 (12), p.1249-1256
Main Authors: Gummow, R.J., Liles, DC, Thackeray, MM
Format: Article
Language:English
Subjects:
250903 - Energy Storage- Batteries- Materials, Components, & Auxiliaries
360602 - Other Materials- Structure & Phase Studies
ALKALI METAL COMPOUNDS
CHALCOGENIDES
CHEMISTRY
CRYSTAL-PHASE TRANSFORMATIONS
ELECTRIC BATTERIES
ELECTROCHEMICAL CELLS
ELECTROCHEMISTRY
ELECTRODES
Elements and non-metal compounds (oxides, hydroxides, hydrides, sulfides, carbides, ...)
ENERGY STORAGE
Exact sciences and technology
Inorganic chemistry and origins of life
LITHIUM COMPOUNDS
LITHIUM OXIDES
MANGANESE COMPOUNDS
MANGANESE OXIDES
MATERIALS
MATERIALS SCIENCE
OXIDES
OXYGEN COMPOUNDS
PHASE TRANSFORMATIONS
Preparations and properties
SYNTHESIS
TRANSITION ELEMENT COMPOUNDS
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Summary:Orthorhombic LiMnO 2 products, synthesised by the reaction of γ-MnO 2 and LiOH in argon at 600–620°C using carbon as a reducing agent, have been evaluated as electrode materials in lithium cells. Products that contained a minor proportion of a lithiated spinel phase showed greater electrochemical activity than pure LiMnO 2. On delithiation, LiMnO 2 transforms irreversibly to a spinel-type structure. A mechanism for the orthorhombic Li xMnO 2-spinel phase transformation is proposed.
ISSN:0025-5408
1873-4227
DOI:10.1016/0025-5408(93)90172-A