Mechanistic studies on the electrochemically lithiated spinel LiCuVO sub 4
- Kobe Univ. (Japan)
- Mie Univ, Tsu (Japan)
The lithiation mechanism of the spinel LiCuVO{sub 4} was studied by X-ray diffraction, XPS, and electrochemical measurements using the lithium cell with the spinel cathode. The lithiation proceeded by the following steps: (1) in the multiphasic reaction for x < 1.5 in Li{sub 1+x}CuVO{sub 4}, the LiCuVO{sub 4} spinel transforms to a new phase, Li{sub 2.5}Cu{sub 0.5}VO{sub 4}, and Cu metal; (2) in the monophasic electrochemical displacement reaction for 1.5 < x < 2.0, the copper ions extrude from Li{sub 2.5}Cu{sub 0.5}VO{sub 4} with lithium intercalation, which forms Li{sub 3}VO{sub 4} and Cu metal; (3) in the intercalation reaction for 2.0 < x <5.0, lithium ions intercalate into Li{sub 3}VO{sub 4} with several reaction steps. The new phase, Li{sub 2.5}Cu{sub 0.5}VO{sub 4}, lithiated reversibly with the electrochemical displacement between copper and lithium ions.
- OSTI ID:
- 7163325
- Journal Information:
- Journal of Solid State Chemistry; (United States), Vol. 94:2; ISSN 0022-4596
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
SPINELS
ELECTROCHEMISTRY
AUGER ELECTRON SPECTROSCOPY
CARBONIC ACID ESTERS
CATHODES
CHARGE TRANSPORT
CHEMICAL PREPARATION
CHEMICAL REACTION KINETICS
CURRENT DENSITY
DIFFUSION
ELECTRIC DISCHARGES
ENERGY DENSITY
IONIC CONDUCTIVITY
LITHIUM PERCHLORATES
POWDERS
VANADATES
X-RAY DIFFRACTION
ALKALI METAL COMPOUNDS
CHEMISTRY
CHLORINE COMPOUNDS
COHERENT SCATTERING
DIFFRACTION
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELECTRODES
ELECTRON SPECTROSCOPY
ESTERS
HALOGEN COMPOUNDS
KINETICS
LITHIUM COMPOUNDS
MINERALS
ORGANIC COMPOUNDS
OXIDE MINERALS
OXYGEN COMPOUNDS
PERCHLORATES
PHYSICAL PROPERTIES
REACTION KINETICS
SCATTERING
SPECTROSCOPY
SYNTHESIS
TRANSITION ELEMENT COMPOUNDS
VANADIUM COMPOUNDS
400400* - Electrochemistry