PRODUCTION PROCESS FOR LITHIUM BORATE-SYSTEM COMPOUND

摘要

A process is provided, process which makes it possible to produce lithium-borate-system materials by means of relatively simple means, lithium-borate-system materials which are useful as positive-electrode active materials for lithium-ion secondary battery, and the like, whose cyclic characteristics, capacities, and so forth, are improved, and which have better performance. The present production is characterized in that a divalent metallic compound including at. least one member of compounds that is selected from the group consisting of divalent-iron compounds and divalent-manganese compounds, and boric acid as well as lithium hydroxide are reacted at 400-650 °C in a molten salt of a carbonate mixture comprising lithium carbonate and at least one member of alkali-metal carbonates that is selected from the group consisting of potassium carbonate, sodium, carbonate, rubidium carbonate and cesium carbonate in a reducing atmosphere.