PREPARATION AND LITHIUM INTERCALATION PROPERTIES OF RAPIDLY QUENCHED GLASSES IN THE SYSTEM FE2O3-V2O5

The glasses in the system Fe2O3-V2O5 were prepared by rapid quenching and their electrochemical properties as a cathode of lithium cells were investigated. Both the glass-transition temperature and the crystallization temperature increased with an increase in the Fe2O3 content of the glasses. The lithium cells with those glasses showed the high specific capacity in the range of 230 to 100 Ah kg-1, when the cells discharged under a constant-current density 1 Am-2 to a cut-off voltage 2.0 V. There was a maximum in the discharge capacities at around 15 mol% Fe2O3 of the glasses. A maximum in chemical diffusion coefficients is also observed at around 15 mol% Fe2O3. These results suggest that the discharge properties of the cells with the Fe2O3-V2O5 glasses are primary governed by the diffusion of lithium ions into the glasses. © 1990.