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Positive electrode active material for non-aqueous electrolyte secondary batteries, production method therefor, and non-aqueous electrolyte secondary battery using said positive electrode active material

A cathode active material and secondary battery technology, which is applied to non-aqueous electrolyte storage batteries, active material electrodes, electrode manufacturing, etc., can solve the problems of high capacity and high output, and achieve high industrial value and easy manufacturing methods. Effect

Active Publication Date: 2020-04-24
SUMITOMO METAL MINING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0017] Therefore, although various lithium-nickel composite oxides in which a part of nickel is substituted with other substances have been developed, currently, when used in a non-aqueous electrolyte secondary battery, it is not possible to obtain a lithium-nickel composite oxide that can sufficiently satisfy high capacity and high output. Required positive electrode active material composed of lithium nickel composite oxide

Method used

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  • Positive electrode active material for non-aqueous electrolyte secondary batteries, production method therefor, and non-aqueous electrolyte secondary battery using said positive electrode active material
  • Positive electrode active material for non-aqueous electrolyte secondary batteries, production method therefor, and non-aqueous electrolyte secondary battery using said positive electrode active material
  • Positive electrode active material for non-aqueous electrolyte secondary batteries, production method therefor, and non-aqueous electrolyte secondary battery using said positive electrode active material

Examples

Experimental program
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Effect test

Embodiment 1

[0287] First, set the temperature in the reaction tank to 49.5°C, and while maintaining the reaction solution in the reaction tank at a pH of 13.0 based on the liquid temperature of 25°C with a 20% by mass sodium hydroxide solution, the reaction solution A mixed aqueous solution of nickel sulfate and cobalt sulfate, an aqueous sodium aluminate solution, and 25% by mass ammonia water are added to the mixture, and it is recovered by overflow. Then, it was washed with a 45 g / L sodium hydroxide aqueous solution with a pH of 12.5 at a liquid temperature of 25° C., washed with water, and dried to obtain a nickel composite hydroxide (neutralization crystallization method).

[0288] This nickel composite hydroxide is composed of a plurality of primary particles of 1 μm or less aggregated into spherical secondary particles. The result of analysis by the ICP method confirmed that the nickel composite with a molar ratio of Ni:Co:Al of 91:5:4 hydroxide. The volume-based average particle dia...

Embodiment 2

[0302] Add 1.2g aluminum hydroxide (Al(OH) 3 ), except that the amount of aluminum relative to the total number of atoms of Ni, Co, and Al contained in the lithium-nickel composite oxide was 0.10 atomic %, the same as in Example 1 was carried out to obtain and evaluate a positive electrode active material. The results are shown in Table 1.

Embodiment 3

[0304] Add 2.4g aluminum hydroxide (Al(OH) 3 ), except that the amount of aluminum relative to the total number of atoms of Ni, Co, and Al contained in the lithium-nickel composite oxide was 0.20 at %, except that the positive electrode active material was obtained and evaluated in the same manner as in Example 1. The results are shown in Table 1.

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Abstract

Provided are: a positive electrode active material for non-aqueous electrolyte secondary batteries which is capable of achieving both high capacity and high output when used in a positive electrode material; a non-aqueous electrolyte secondary battery in which said positive electrode active material is employed, and which is highly safe and has a high capacity and a high output; and a method for producing the positive electrode active material which is capable of producing said positive electrode active material with ease even on an industrial scale. The positive electrode active material fornon-aqueous electrolyte secondary batteries is characterized by: including at least primary particles of a lithium-nickel composite oxide represented by the general formula LizNi1-x-yCoxMyO2 (where 0.95<=z<=1.03, 0<x<=0.20, 0<y<=0.10, x+y<=0.20, and M represents at least one element selected from Mg, Al, Ca, Ti, V, Cr, Mn, Nb, Zr, and Mo), and secondary particles formed by aggregating the primaryparticles; and having an LiAl compound provided to the surfaces of the primary particles.

Description

Technical field [0001] The present invention relates to a positive electrode active material for a non-aqueous electrolyte secondary battery, a manufacturing method thereof, and a non-aqueous electrolyte secondary battery using the positive electrode active material. Background technique [0002] In recent years, with the rapid expansion of small electronic devices such as mobile phones and notebook computers, the demand for non-aqueous electrolyte secondary batteries as a power source that can be charged and discharged has increased sharply. [0003] As the positive electrode active material of the non-aqueous electrolyte secondary battery, lithium cobalt oxide (LiCoO 2 ) Represented by lithium cobalt composite oxide and lithium nickelate (LiNiO 2 ) Represented by lithium nickel composite oxide, lithium manganate (LiMnO 2 ) Is a representative lithium manganese composite oxide. [0004] However, lithium cobalt oxide is expensive because of its small storage amount, and there is a pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/525C01G53/00H01M4/36H01M4/505
CPCH01M4/525C01P2004/84C01G53/50C01G53/006H01M4/366H01M2004/028H01M4/131H01M10/0525Y02E60/10H01M4/62H01M10/052C01G53/42C01F7/04C01P2004/80C01P2006/40C01P2002/74H01M4/0471H01M4/505
Inventor 横山润渔师一臣
Owner SUMITOMO METAL MINING CO LTD