X-Ray Absorption and Magnetic Resonance Spectroscopic Studies of LixV6Ol3

Polycrystalline Li(x)V6O13 samples, 0.5< or = x< or = 6, were prepared by chemical intercalation in n-butyl lithium and investigated by various spectroscopic techniques, including x-ray absorption, electron paramagnetic resonance (EPR), and (7)Li solid state nuclear magnetic resonance (NMR). T...

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Bibliographic Details
Main Authors: Stallworth, P. E, Kostov, S, Den Boer, M. L, Greenbaum, S. G, Lampe-Onnerud, C
Format: Report
Language:English
Subjects:
Atomic and Molecular Physics and Spectroscopy
BUTYL RADICALS
CHEMICAL INTERCALATION
DISTRIBUTION FUNCTIONS
Electricity and Magnetism
ELECTRON PARAMAGNETIC RESONANCE
Inorganic Chemistry
IONS
K EDGE
LITHIUM COMPOUNDS
MAGNETIC RESONANCE
N-BUTYL LITHIUM
NEAR EDGE
OXIDATION
OXIDES
Physical Chemistry
POLYCRYSTALLINE
RADIAL FLOW
SOLID STATE PHYSICS
SPATIAL DISTRIBUTION
SPECTROSCOPY
STRUCTURAL PROPERTIES
SYMMETRY
VANADIUM
X RAY ABSORPTION ANALYSIS
X RAY DIFFRACTION
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Summary:Polycrystalline Li(x)V6O13 samples, 0.5< or = x< or = 6, were prepared by chemical intercalation in n-butyl lithium and investigated by various spectroscopic techniques, including x-ray absorption, electron paramagnetic resonance (EPR), and (7)Li solid state nuclear magnetic resonance (NMR). The EPR results, which are sensitive to the total V(+4) concentration, are consistent with the expectation that the formal oxidation state of vanadium decreases monotonically with the addition of Li. This is confirmed by near-edge x-ray absorption fine structure spectra at the vanadium K-edge. The extended x-ray absorption fine structure shows that the local symmetry of the vanadium sites, as determined by the intensity of the first V-O peak in the radial distribution function, decreases with increasing x from 0