PREPARATION METHOD FOR POSITIVE ELECTRODE ACTIVE MATERIAL OF LITHIUM ION BATTERY

摘要

A preparation method for a positive electrode active material of a lithium ion battery, comprising: providing LiMPO4 particles and LiNPO4 particles, both the LiMPO4 particles and the LiNPO4 particles being an olivine-type crystal which is orthorhombic with a space group of Pnma, wherein M is Fe, Mn, Co or Ni, N is a divalent metal, and N and M are different elements; mixing the LiMPO4 particles and the LiNPO4 particles to obtain a precursor; and sintering the precursor to obtain a positive electrode active material of LiMxN1-xPO4 particles, with 0