Abstract
The new vanadium oxide, with the composition has been prepared by electrochemical oxidation of the solid precursor in aqueous solution. The reaction mechanism is a two-phase transformation involving simultaneously calcium extraction, oxygen insertion, and ion exchange. This poorly crystallized compound has a layered structure, with interlayer and related to that of xerogels and electrolytic The anhydrous compound reversibly intercalates 2.3 Li per formula unit (210 at a slow rate in the 1.5-4 V range, whereas the precursor does not intercalate any lithium under similar conditions. Preliminary cycling data indicate that the capacity depends on the cycling rate and decreases during cycling. © 2001 The Electrochemical Society. All rights reserved.
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