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Nickel-containing composite hydroxide and production method thereof, positive electrode active material for nonaqueous electrolyte secondary battery and production method thereof, and nonaqueous electrolyte secondary battery

A technology of composite hydroxide and positive active material, applied in non-aqueous electrolyte batteries, active material electrodes, secondary batteries, etc., can solve the problem that irreversible capacity is sufficiently small, it is difficult to suppress the increase of non-lithium occupancy, and energy density cannot be obtained. and other problems, to achieve the effect of great industrial significance and improved filling.

Active Publication Date: 2019-06-04
SUMITOMO METAL MINING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the positive electrode active material obtained by using nickel-containing composite hydroxide as a precursor described in Japanese Patent Application Laid-Open No. 2011-201764, when the average particle size of the secondary particles is 20 μm or more, it is difficult to suppress non-lithium occupancy. rate, so it is impossible to obtain a secondary battery with high energy density and sufficiently small irreversible capacity

Method used

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  • Nickel-containing composite hydroxide and production method thereof, positive electrode active material for nonaqueous electrolyte secondary battery and production method thereof, and nonaqueous electrolyte secondary battery
  • Nickel-containing composite hydroxide and production method thereof, positive electrode active material for nonaqueous electrolyte secondary battery and production method thereof, and nonaqueous electrolyte secondary battery
  • Nickel-containing composite hydroxide and production method thereof, positive electrode active material for nonaqueous electrolyte secondary battery and production method thereof, and nonaqueous electrolyte secondary battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0168] [Crystalization process]

[0169] First, add 32L of industrial water and 1300mL of 25% by mass ammonia water to the overflow type crystallization reaction tank with a volume of 34L (diameter: 300mm, height 500mm) equipped with 4 baffle plates, and then pass through the constant temperature tank and The temperature in the tank was adjusted to 40°C by a heating hood. A 24% by mass caustic soda solution was further added to the water in the reaction tank, and adjusted so that the pH of the reaction liquid in the tank was 10.9 to 11.1. It should be noted that since the pH value is the pH value at a liquid temperature of 40°C, from the viewpoint of accurately controlling the pH, it is necessary to collect a small amount of the reaction solution and cool the reaction liquid to the pH value at a liquid temperature of 25°C. Adjustment of the pH value of the reaction solution was carried out so as to be 11.7 to 11.9.

[0170] Next, nickel sulfate and cobalt sulfate were dissol...

Embodiment 2

[0195] In the crystallization step, except that the stirring speed (number of rotations) was set to 600 rpm, the same operation as in Example 1 was performed to obtain a nickel composite hydroxide and a positive electrode active material having the same composition. Table 1 shows the crystallization conditions and characteristics of the obtained nickel-containing composite hydroxide, and Table 2 shows the firing conditions and characteristics of the positive electrode active material. In addition, using this positive electrode active material, the same operation as in Example 1 was performed to construct a non-aqueous electrolyte secondary battery, and the evaluation thereof was performed. The results are shown in Table 2. In addition, the items shown in Table 1 and Table 2 are the same in the following Examples 3 to 16 and Comparative Examples 1 to 10.

Embodiment 3

[0197] In the crystallization process, except that the stirring speed (number of rotations) was set at 1200rpm, the same operation as in Example 1 was carried out to obtain a nickel-containing composite hydroxide, a positive electrode active material, and a non-aqueous electrolyte of the same composition. Battery.

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Abstract

The present invention provides a nickel composite hydroxide as a precursor of a positive electrode active material capable of constituting a non-aqueous electrolyte secondary battery with a small irreversible capacity and high energy density. Add an aqueous alkali solution and a complexing agent to a mixed aqueous solution containing at least nickel and cobalt, thereby adjusting the pH value of the mixed aqueous solution (based on a liquid temperature of 25°C) to 11.0 to 13.0, and the concentration of ammonium ions to 4g / L to 15g / L, the reaction temperature is 20°C to 45°C, using a stirring paddle with an inclination angle of more than 20° and less than 60° relative to the horizontal plane, so that the obtained nickel-containing composite hydroxide can be roasted in the atmosphere at 800°C The crystallization reaction proceeded under stirring conditions such that the BET value in the case of 2 hours became 12 m2 / g to 50 m2 / g. Based on this, Ni1‑x‑yCoxAlyMt(OH)2+α (0<x≤0.20, 0<y≤0.15, 0≤t≤0.10, 0≤α≤0.50, M is obtained from Mg, Ca, Ba, Nb , Mo, V, Ti, Zr, Y selected from one or more elements), or by the general formula: Ni1‑x‑zCoxMnzMt(OH)2+α (0<x≤0.50, 0<z≤0.50, x+z≤0.70, 0≤t≤0.10, 0≤α≤0.50, M is one or more elements selected from Mg, Ca, Ba, Nb, Mo, V, Ti, Zr, Y) Nickel complex hydroxide.

Description

technical field [0001] The present invention relates to a nickel-containing composite hydroxide and a production method thereof, a positive electrode active material for a non-aqueous electrolyte secondary battery using the nickel-containing composite hydroxide as a raw material, a production method thereof, and a non-aqueous electrolyte secondary battery using the same A non-aqueous electrolyte secondary battery in which the positive electrode active material is used as the positive electrode material. Background technique [0002] In recent years, with the popularization of portable electronic devices such as mobile phones and notebook personal computers, it is necessary to develop small and lightweight secondary batteries with high energy density. In addition, as batteries for electric vehicles including hybrid vehicles, it is also necessary to develop high-output secondary batteries. As a non-aqueous electrolyte secondary battery satisfying these demands, there is a lit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G53/00H01M4/525
CPCC01G53/006C01G53/50C01G53/66C01P2006/11C01P2006/40H01M4/525C01G53/42C01P2004/03C01P2004/32C01P2004/61C01P2006/12H01M10/0525H01M2004/021H01M2004/028H01M4/485H01M4/505H01M10/052C01P2004/50Y02E60/10Y02T10/70C01P2004/53C01P2004/62C01P2004/64
Inventor 渔师一臣森建作加濑克也镰田康孝
Owner SUMITOMO METAL MINING CO LTD