Patent ID: 8460573
Filing Date: 2013-06-11
Classification: B82Y,C01B,C01D,C01P,H01M,Y02E,Y10T

Abstract:
1. A method for producing a cathode active material for lithium ion batteries, comprising: at least a step of carrying out a hydrothermal reaction to produce LiFePO 4 by adding elements Li and Fe in Li and Fe salts, which are used as raw materials, in amounts excessively larger than the theoretical amounts required for the hydrothermal reaction, thus synthesizing LiFePO 4 which has an average primary particle size of equal to or larger than 30 nm and equal to or smaller than 100 nm, wherein the Fe salt is added so that the molar ratio of Fe to P is within the range of 1.01 to 2.00, and the Li salt is added so that the molar ratio of Li to P is within the range of 3.1 to 4.50.