LI-ION BATTERY POSITIVE ELECTRODE MATERIAL, METHOD PREPARING THE SAME AND APPLICATION THEREOF

摘要

The present application discloses a Li-ion battery positive electrode material, a method for preparing the same and application thereof. The positive electrode material can reduce the relative volume change rate of the positive electrode material in insertion and deinsertion states of Li ions, and meanwhile can efficiently restrain Mn in the positive material from dissolving out during charging and discharging cycles, thereby improving the crystal structure stability of the positive electrode in the working state. A Li-ion battery applying such a positive electrode material has excellent cycle performance, safety and high-temperature storage performance.

主权项

1. A Li-ion battery positive electrode material, comprising a compound having a chemical constitution represented by formula I:
LiMnxFe1-xP1-aSibMcO4-dFd   Formula I in which, M is selected from at least one of As, B, Cl and S; 0.1≦x≦0.9, 0