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Lithium insertion in V/sub 3/Nb/sub 9/O/sub 29/. A Wadsley-Roth type phase. Technical report, June 1984-July 1985

Technical Report ·
OSTI ID:6473236
; ;

Compounds that can reversibly incorporate lithium atoms into their structure are of interest because of their potential use as cathode materials in secondary batteries. Recently Cava et al, reported on the lithium insertion reactions of Wadsley-Roth type phases. These compounds are oxide crystallographic shear structures that form with stoichiometries between MO/sub 3/ and MO/sub 2/. The structures can be described in terms of blocks of corner sharing MO/sub 6/ octachedra which are finite in two out of three dimensions, and are joined to adjacent blocks of edge sharing. Thus there are nxmx infinity ReO/sub 3/-type units, where n and m are the length and width of the blocks. The structures display open-tunnel-like regions (which can accommodate small cations) bound by extensive MO/sub 6/ octahedra edge sharing. It is shown that some crystallographic shear is required to stabilize ReO/sub 3/-type structures upon lithium insertion. In summary, V/sub 3/Nb/sub 8/O/sub 29/ a Wadsley-Roth type phase, undergoes lithium insertion reversible to Li/sup 13/ /sup 6/V/sub 3/Nb/sub 9/O/sub 29/ at room temperature and shows promise as a feasible electrode material for secondary lithium batteries.

Research Organization:
Rutgers--the State Univ., New Brunswick, NJ (USA). Dept. of Chemistry
OSTI ID:
6473236
Report Number(s):
AD-A-157945/7/XAB; TR-8
Country of Publication:
United States
Language:
English

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Related Subjects

25 ENERGY STORAGE
250903* -- Energy Storage-- Batteries-- Materials
Components
& Auxiliaries
36 MATERIALS SCIENCE
360202 -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
ALKALI METALS
CATHODES
CHALCOGENIDES
CHEMISTRY
CRYSTAL STRUCTURE
ELECTRIC BATTERIES
ELECTROCHEMICAL CELLS
ELECTROCHEMISTRY
ELECTRODES
ELEMENTS
LITHIUM
METALLURGICAL EFFECTS
METALS
NIOBIUM COMPOUNDS
NIOBIUM OXIDES
OXIDES
OXYGEN COMPOUNDS
REFRACTORY METAL COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
VANADIUM COMPOUNDS
VANADIUM OXIDES