Cathode active material for non aqueous lithium secondary battery and methods for preparation thereof

摘要

A non-aqueous electrolyte cell includes a cathode containing a cathode active material, which is mainly composed of a compound represented by the general formula LixFePO4, where 0 < x ≤ 1, with the molar ratio of Li3PO4 to a compound represented by the general formula LixFePO4, which ratio is represented by Li3PO4/LiFePO4, being Li3PO4/LiFePO4 ≤ 6.67 x 10<-2>. Starting materials for the synthesis of compound LixFePO4 where 0 < x ≤ 1 are Li3PO4 and Fe3(PO4)2 or Fe3(PO4)2nH2O when n denotes a number of hydrates.