MANUFACTURING METHOD OF CATHODE MATERIAL FOR LITHIUM-ION BATTERY

PROBLEM TO BE SOLVED: To provide a manufacturing method of a cathode material for a lithium-ion battery obtaining an iron-containing cathode active material by irradiating ultrasonic waves on a starting material for chemical reaction. SOLUTION: In a schematic diagram of an ultrasonic synthesizer, 1 is a multi-frequency ultrasonic generating device, 2 is an oscillator, 3 is an eggplant-shaped flask, 4 is a stirrer, 5 is a gas injection inlet, and 6 is a water tank. LiOH-H2O, FeSO4-7H2O, and (NH4)2HPO4are used as starting materials for the ultrasonic synthesization of LiFePO4, which are weighed in a molar ratio of 2.5:1:1, put in the flask 3, and have preliminarily dried pure water added by 40 ml, after that, argon gas is injected from the gas injection inlet 5 and 200Hz, 200W ultrasonic waves are irradiated on them for three hours by the oscillator 2 of the multi-frequency ultrasonic generating device 1, and they are dried in the argon gas at 700°C to obtain the LiFePO4. COPYRIGHT: (C)2007,JPO&INPIT