Nickel complex hydroxide particles and nonaqueous electrolyte secondary battery
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United States of America Patent
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Jan 2, 2018
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app pub date -
Dec 2, 2010
filing date -
Dec 2, 2009
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Abstract
Disclosed are: nickel complex hydroxide particles that have small and uniform particle diameters; and a method by which the nickel complex hydroxide particles can be produced. Specifically disclosed is a method for producing a nickel complex hydroxide by a crystallization reaction, which comprises: a nucleation step in which nucleation is carried out, while controlling an aqueous solution for nucleation containing an ammonium ion supplying material and a metal compound that contains nickel to have a pH of 12.0-13.4 at a liquid temperature of 25° C.; and a particle growth step in which nuclei are grown, while controlling an aqueous solution for particle growth containing the nuclei, which have been formed in the nucleation step, to have a pH of 10.5-12.0 at a liquid temperature of 25° C. In this connection, the pH in the particle growth step is controlled to be less than the pH in the nucleation step.
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