专利号:US-12040487-B1 优先权日:2019-02-26 标 题:Positive electrode active material, positive electrode having the same and lithium secondary battery 发明人:MICHOT CHRISTOPHE 权利人:MICHOT CHRISTOPHE 摘要:The invention relates to a process for the preparation of carbon-deposited alkali metal oxyanion and the use thereof as cathode material in lithium secondary batteries wherein the process comprises synthesis of partially reacted alkali metal oxyanion, a wet-based nanomilling step, a drying step and a subsequent carbon deposition step performed by a thermal CVD process. The invention also relates to carbon deposited alkali metal oxyanion with less than 80 ppm of sulfur impurities for the preparation of a cathode of lithium secondary batteries with exceptional high-temperature electrochemical properties.