Nickel composite hydroxide and method for producing the same, positive electrode active material and method for producing the same as well as nonaqueous electrolytic secondary cell

Abstract

A nickel composite hydroxide represented by Ni1-x-y-zCoxMnyMz(OH)2+A (where 0<=x<=0.35, 0<=y<=0.35, 0<=z<=0.1, 0<x+y, 0<x+y+z<=0.7, 0<=A<=0.5, with M being at least one of V, Mg, Al, Ti, Mo, Nb, Zr and W), a plate-shaped crystal core is generated by allowing a crystal core generating aqueous solution containing cobalt and / or manganese to have a pH value of 7.5 to 11.1 at a standard liquid temperature of 25 DEG C., and slurry for the particle growth containing the plate-shaped crystal core is adjusted to a pH value of 10.5 to 12.5 at a standard liquid temperature of 25 DEG C., while a mixed aqueous solution containing a metal compound containing at least nickel is being supplied thereto, so that the crystal core is grown as particles.

Description

technical field [0001] The present invention relates to a nickel composite hydroxide used as a precursor of a lithium nickel composite oxide used as a positive electrode active material in a nonaqueous electrolyte secondary battery such as a lithium ion secondary battery, a method for producing the same, and a nickel composite hydrogen A positive electrode active material for a nonaqueous electrolyte secondary battery of an oxide, a method for producing the same, and a nonaqueous electrolyte secondary battery in which a positive electrode is formed from the positive electrode active material. Background technique [0002] In recent years, with the popularization of portable devices such as mobile phones and notebook computers, the development of small and lightweight secondary batteries with high energy density has been strongly desired. As such a secondary battery, there is a lithium ion secondary battery using lithium, a lithium alloy, a metal oxide, or carbon as a negativ...

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Problems solved by technology

[0010] However, even if the lithium access surface is oriented on the outside of the secondary particle, if the contact between the positive electrode active material and the electrolyte solution cannot be sufficiently achieved, the output characteristics will be adversely affected.

In addition, although the rate characteristics are described, the battery capacity itself, which is an important characteristic of battery characteristics, is not described.

[0011] As mentioned above, it is difficult to obtain a positive electrode active material capable of forming a thin electrode film with a high electrode density, high capacity, and excellent output characteristics industrially.

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