NICKEL COMPOSITE HYDROXIDE POSITIVE ELECTRODE ACTIVE MATERIAL FOR NON-AQUEOUS ELECTROLYTE SECONDARY CELL NON-AQUEOUS ELECTROLYTE SECONDARY CELL AND METHODS FOR PRODUCING THESE

摘要

The present invention relates to an aqueous solution containing at least a nickel salt and a neutralizing agent which are supplied continuously to a reaction vessel with stirring and not containing a complex ion forming agent for forming a complex ion with a metal element in the reaction aqueous solution, The crystallization reaction is controlled so that the volume average particle diameter becomes 0.2 to 0.6 with respect to the secondary particles finally obtained, to obtain a nickel complex hydroxide slurry. Thereafter, while keeping the state that the complex ionizing agent is not contained, only the liquid component of the slurry is continuously removed while maintaining the capacity of the slurry obtained in the primary crystallization step, By controlling the pH value at 90 占 폚 and the liquid temperature at 25 占 폚 in the range of 10.0 to 11.0 and continuing the crystallization reaction until the secondary particles have a volume average particle diameter of 8.0 to 50.0 占 퐉, And a method for producing the same.