High-rate positive electrode material, preparation method thereof and non-aqueous energy storage device

The invention discloses a high-rate positive electrode material, which is obtained by coating the surface of spherical lithium manganate with an F-doped SnO2 film. The chemical structural general formula of the positive electrode material is x(SnOFy)/(1-x)LiMn2O4, and x is greater than or equal to 0 and less than or equal to 0.5, y is greater than or equal to 0 and less than or equal to 0.2.The invention also discloses a preparation method of the high-rate positive electrode material and a non-aqueous energy storage device. According to the high-rate positive electrode material disclosedby the invention, the inorganic conductive film is generated on the spherical lithium manganate in situ, so that relatively high gram volume of the spherical lithium manganate can be maintained, andthe high-rate positive electrode material also has relatively good high-temperature performance and also has energy of rapid charging and rapid discharging. 本发明公开了一种高倍率正极材料，所述正极材料是于球形锰酸锂表面包覆F掺杂SnO2薄膜而得到的，其化学结构通式为：x(SnO2-yFy)/(1