Mechanistic studies on the electrochemically lithiated spinel LiCuVO sub 4

Journal Article · Tue Oct 01 04:00:00 UTC 1991 · Journal of Solid State Chemistry; (United States)

DOI:https://doi.org/10.1016/0022-4596(91)90198-Q· OSTI ID:7163325

Kanno, R; Kawamoto, Y ^[1]; Takeda, Y; Hasegawa, M; Yamamoto, O ^[2]

---

1. Kobe Univ. (Japan)
2. 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), Journal Name: Journal of Solid State Chemistry; (United States) Vol. 94:2; ISSN JSSCB; ISSN 0022-4596
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400400* -- Electrochemistry
ALKALI METAL COMPOUNDS
AUGER ELECTRON SPECTROSCOPY
CARBONIC ACID ESTERS
CATHODES
CHARGE TRANSPORT
CHEMICAL PREPARATION
CHEMICAL REACTION KINETICS
CHEMISTRY
CHLORINE COMPOUNDS
COHERENT SCATTERING
CURRENT DENSITY
DIFFRACTION
DIFFUSION
ELECTRIC CONDUCTIVITY
ELECTRIC DISCHARGES
ELECTRICAL PROPERTIES
ELECTROCHEMISTRY
ELECTRODES
ELECTRON SPECTROSCOPY
ENERGY DENSITY
ESTERS
HALOGEN COMPOUNDS
IONIC CONDUCTIVITY
KINETICS
LITHIUM COMPOUNDS
LITHIUM PERCHLORATES
MINERALS
ORGANIC COMPOUNDS
OXIDE MINERALS
OXYGEN COMPOUNDS
PERCHLORATES
PHYSICAL PROPERTIES
POWDERS
REACTION KINETICS
SCATTERING
SPECTROSCOPY
SPINELS
SYNTHESIS
TRANSITION ELEMENT COMPOUNDS
VANADATES
VANADIUM COMPOUNDS
X-RAY DIFFRACTION