NICKEL/MANGANESE COMPOSITE HYDROXIDE PARTICLE AND METHOD OF MANUFACTURING THE SAME, CATHODE ACTIVE MATERIAL FOR NONAQUEOUS ELECTROLYTE SECONDARY CELL AND METHOD OF MANUFACTURING THE SAME, AND NONAQUEOUS ELECTROLYTE SECONDARY CELL

摘要

PROBLEM TO BE SOLVED: To provide nickel/manganese composite hydroxide particles to be a precursor of cathode active material comprising lithium nickel manganese composite hydroxide having a small and uniform particle diameter and hollow structure for obtaining a nonaqueous electrolyte secondary cell having a high capacity, high power output and good cycle characteristic.

SOLUTION: In this method, when nickel/manganese composite hydroxide particles are obtained by crystallization reaction, an aqueous solution for nucleation at least containing Ni compound and Mn compound and not containing a complex ion forming agent which forms a complex ion with nickel, manganese and cobalt is controlled to be at a liquid temperature of not lower than 60°C and at a pH value of 11.5-13.5 based on a liquid temperature of 25°C for nucleation, then the aqueous solution containing the nuclei for particle growth is controlled to be at a liquid temperature of not lower than 60°C and at a pH value of 9.5-11.5 based on the liquid temperature of 25°C, which must be lower than the pH value in the nucleation process, for growth of the nuclei.

COPYRIGHT: (C)2013,JPO&INPIT