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Nickel manganese composite hydroxide and method for producing same, positive electrode active material for nonaqueous electrolyte secondary battery and method for producing same, and nonaqueous electrolyte secondary battery

A technology of composite hydroxide and positive electrode active material, which is applied in the direction of non-aqueous electrolyte, active material electrode, secondary battery, etc., can solve the cost-consuming, lithium-ion battery lithium metal composite oxide composite hydroxide, Problems such as lithium-ion secondary battery composite hydroxide have not yet been developed, achieving the effect of high industrial value, excellent cycle characteristics, and easy implementation

Active Publication Date: 2019-05-24
SUMITOMO METAL MINING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the process for producing two types of particles with different particle diameters increases, and therefore costs
[0007] As described above, lithium metal composite oxides capable of sufficiently improving the performance of lithium-ion batteries and composite hydroxides used as raw materials for the above composite oxides have not yet been developed.
In addition, various studies have been carried out on methods for producing composite hydroxides, but at present, on an industrial scale, no raw materials capable of producing lithium metal composite oxides capable of sufficiently improving the performance of lithium-ion secondary batteries have been developed. Composite Hydroxide Method

Method used

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  • Nickel manganese composite hydroxide and method for producing same, positive electrode active material for nonaqueous electrolyte secondary battery and method for producing same, and nonaqueous electrolyte secondary battery
  • Nickel manganese composite hydroxide and method for producing same, positive electrode active material for nonaqueous electrolyte secondary battery and method for producing same, and nonaqueous electrolyte secondary battery
  • Nickel manganese composite hydroxide and method for producing same, positive electrode active material for nonaqueous electrolyte secondary battery and method for producing same, and nonaqueous electrolyte secondary battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0148] [Production of composite hydroxide]

[0149] Add a specified amount of pure water into the reaction tank (50L), and adjust the stirring power to 6.0kW / m 2 , and set the temperature in the tank to 42°C while stirring. At this time, the inside of the reaction tank was made into a non-oxidizing atmosphere (oxygen concentration: 1 vol%), and the concentration of dissolved oxygen in the reaction tank solution was adjusted so that it became 1.0 mg / L. In the reaction tank, a 2.0M mixed aqueous solution of nickel sulfate, cobalt sulfate, and manganese sulfate was continuously added simultaneously and continuously as an alkaline solution in such a manner that the molar ratio of nickel: cobalt: manganese was 46:30:24. 25% by mass of sodium hydroxide solution and 25% by mass of ammonia water as a complexing agent to form a reaction aqueous solution. The dissolved nickel concentration was adjusted at 400mg / L by pH value and ammonium ion concentration. At this time, the pH in the...

Embodiment 2

[0166] A positive electrode active material was obtained and evaluated in the same manner as in Example 1 except that the nickel concentration of the reaction aqueous solution in the crystallization process was 600 mg / L. The evaluation results of the obtained positive electrode active materials are shown in Table 2, respectively.

Embodiment 3

[0168] A positive electrode active material was obtained and evaluated in the same manner as in Example 1, except that the residence time of the mixed aqueous solution in the crystallization step was 10 hours.

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Abstract

The purpose of the present invention is to provide a nickel manganese composite hydroxide and method for producing the same, etc., which when used as a precursor for a positive electrode active material, allows a secondary battery to be obtained that has a high particle packing capability and excellent battery characteristics. The present invention provides a nickel manganese composite hydroxide and method for producing the same, the nickel manganese composite hydroxide being represented by the general formula, Ni<x>Mn<y>M<z>(OH)<2>+[alpha], and including secondary particles in each of which aplurality of primary particles are aggregated, wherein the primary particles have an aspect ratio of 3 or more, at least a portion of the primary particles are radially arranged in a direction from the center toward the circumference of the secondary particle, and the secondary particles are such that the ratio I(101) / I(001) of the diffraction peak intensity I(101) of the 101 plane to the peak intensity I(001) of the 001 plane by X-ray diffraction measurement is 0.15 or less.

Description

technical field [0001] The present invention relates to a nickel-manganese composite hydroxide and a method for producing the same, a positive electrode active material for a nonaqueous electrolyte secondary battery, a method for producing the same, and a nonaqueous electrolyte secondary battery. Background technique [0002] In recent years, with the popularization of portable electronic devices such as mobile phones and notebook personal computers, the development of small and lightweight non-aqueous electrolyte secondary batteries having high energy density has been strongly desired. As such a nonaqueous electrolyte secondary battery, a lithium ion secondary battery is mentioned. Lithium metal, lithium alloy, metal oxide, carbon, etc. are used for the negative electrode material of a lithium ion secondary battery. These materials are materials capable of deintercalating and intercalating lithium. [0003] Currently, research and development on such a lithium ion seconda...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G53/00H01M4/505H01M4/525
CPCC01G53/00H01M4/525C01G53/006C01G53/50C01P2002/74C01P2004/50C01P2004/51C01P2004/61C01P2004/64C01P2004/54C01P2004/03C01P2006/14C01P2006/11C01P2006/16C01P2006/40Y02E60/10C01G53/44H01M4/505H01M2300/0017C01G53/04H01M10/0525H01M2004/028
Inventor 中村拓真金田治辉本间刚秀安藤孝晃山地浩司
Owner SUMITOMO METAL MINING CO LTD
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