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Electrochemical studies of lithium insertion reactions of vanadium oxide bronzes

Conference · · Proc. - Electrochem. Soc.; (United States)
OSTI ID:6312855
The ambient temperature electrochemical insertion of lithium from organic solvent-based electrolytes, into a number of ternary and quaternary vanadium oxide bronzes has been investigated. Rapid lithium diffusion is found in the tunnel structure beta-phase materials Li /SUB y/ M /SUB x/ V/sub 2/O/sub 5/ (M = Na, K, Cu and Li) and in the layer structure bronze Li /SUB 1+y/ V/sub 3/O/sub 8/. Compositionally broad insertion phases are found in both types of system at lower lithium contents, but at higher concentrations narrow phases are found, possibly due to lithium ordering caused by strong electrostatic interactions. Large negative Gibbs free energies of insertion and rapid solid-state diffusion suggest consideration of these compounds as positive electrode materials in lithium cells.
Research Organization:
Department of Materials Science and Engineering, Stanford University, Stanford, CA
OSTI ID:
6312855
Report Number(s):
CONF-831086-
Conference Information:
Journal Name: Proc. - Electrochem. Soc.; (United States) Journal Volume: 84-1
Country of Publication:
United States
Language:
English