Nickel-cobalt compound hydroxide and method and device for producing same, positive electrode active substance for nonaqueous electrolyte secondary cell and method for producing same, and nonaqueous electrolyte secondary cell

A composite hydroxide and cathode active material technology, applied in the direction of active material electrodes, secondary batteries, nickel compounds, etc., can solve the problems of reduced charge and discharge life, difficult industrial scale production, strong self-discharge, etc., to improve the cycle characteristics, cost reduction, and productivity improvement effects
CN104661963AActive Publication Date: 2015-05-27SUMITOMO METAL MINING CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SUMITOMO METAL MINING CO LTD
Publication Date
2015-05-27

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Abstract

[Problem] By obtaining a compound hydroxide that has a sharp particle diameter distribution, the present invention aims to improve the cycle properties of a nonaqueous electrolyte secondary cell obtained using the nickel-cobalt compound hydroxide as the precursor. [Solution] In the present invention, a slurry contains a nickel-cobalt compound hydroxide that is obtained by reacting and continuously feeding to a reactor an aqueous solution containing at least nickel and cobalt, an aqueous solution that serves as an ammonium ion donor, and an aqueous caustic alkali solution. The slurry is continuously extracted and the slurry is separated by grading into large particle diameter portions and small particle diameter portions. The small particle diameter portion is continuously circulated back to the reactor. The resulting nickel-cobalt compound hydroxide is represented by the general formula Ni1-x-yCoxMy (OH)2 (where 0.05 ≤ x ≤ 0.50, 0 ≤ y ≤ 0.10, 0.05 ≤ x + y ≤ 0.50, M is at least one metal element selected from Al, Mg, Mn, Ti, Fe, Cu, Zn, and Ga), wherein the correlations of (D50-D10) / D50 ≤ 0.30 and (D90-D50) / D50 ≤ 0.30 are established between D10, D50, and D90.
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Description

technical field

[0001] The invention relates to a nickel-cobalt composite hydroxide, a manufacturing method and a manufacturing device thereof. In addition, the present invention also relates to a positive electrode active material for a non-aqueous electrolyte secondary battery using the nickel-cobalt composite hydroxide as a raw material and a manufacturing method thereof, and the positive electrode active material for a non-aqueous electrolyte secondary battery as a positive electrode material The non-aqueous electrolyte secondary battery used. Background technique

[0002] In recent years, with the advancement of electronic technology, the miniaturization and weight reduction of electronic equipment has been rapidly promoted. In particular, with the popularization and high functionality of portable electronic devices such as mobile phones and notebook computers, the development of small and lightweight secondary batteries having high energy density is strongly desired a...

Claims

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