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Positive electrode active material for non-aqueous electrolyte secondary battery and method for producing same, and non-aqueous electrolyte secondary battery manufactured using said positive electrode active material

A positive electrode active material and secondary battery technology, applied in the direction of active material electrodes, electrode manufacturing, battery electrodes, etc., can solve the problems of not getting lithium-nickel composite oxide positive electrode active materials, etc., and achieve the improvement of lithium ion conductivity and increase Battery capacity and the effect of maintaining battery capacity

Active Publication Date: 2016-12-21
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 a variety of lithium-nickel composite oxides in which a part of nickel is replaced by other substances have been developed, currently, when used in non-aqueous electrolyte secondary batteries, it is not possible to sufficiently cope with high capacity and high output. Positive electrode active material composed of lithium-nickel composite oxides

Method used

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  • Positive electrode active material for non-aqueous electrolyte secondary battery and method for producing same, and non-aqueous electrolyte secondary battery manufactured using said positive electrode active material
  • Positive electrode active material for non-aqueous electrolyte secondary battery and method for producing same, and non-aqueous electrolyte secondary battery manufactured using said positive electrode active material
  • Positive electrode active material for non-aqueous electrolyte secondary battery and method for producing same, and non-aqueous electrolyte secondary battery manufactured using said positive electrode active material

Examples

Experimental program
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Effect test

Embodiment 1

[0364] First, the temperature in the reaction tank is set to 49.5°C, and the reaction solution in the reaction tank is maintained at a pH value of 13.0 based on a liquid temperature of 25°C using 20% ​​by mass of sodium hydroxide solution. A mixed aqueous solution of nickel sulfate and cobalt sulfate, an aqueous solution of sodium aluminate, and 25% by mass of ammonia water were added to the mixture, and recovered by overflowing. Further, after washing with a 45 g / L sodium hydroxide aqueous solution with a pH value of 12.5 based on a liquid temperature of 25° C., washing with water and drying, the nickel composite hydroxide (neutralized crystallization method).

[0365] The nickel composite hydroxide is composed of spherical secondary particles formed by agglomeration of a plurality of primary particles of 1 μm or less. According to the analysis by the ICP method, it was confirmed that the molar ratio of Ni:Co:Al was 94: 3:3 nickel composite hydroxide.

[0366] The nickel co...

Embodiment 2

[0385] A positive electrode active material was obtained and evaluated in the same manner as in Example 1, except that the alkaline solution (W) was passed through water and the water content of the dehydrated filter cake was controlled to 12.0%. The results are shown in Table 1.

Embodiment 3

[0387] Except having crystallized so that the molar ratio of Ni:Co:Al might become 91:6:3 as a nickel composite hydroxide, it carried out similarly to Example 1, and obtained the positive electrode active material, and evaluated it. The results are shown in Table 1.

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Abstract

The purpose of the present invention is to provide a positive electrode active material for a non-aqueous electrolyte secondary battery which can have both a high capacity and a high output. A positive electrode active material for a non-aqueous electrolyte secondary battery, said positive electrode active material being characterized by comprising primary particles of a lithium nickel composite oxide represented by general formula: LibNi1-x-yCoxMyO2 (wherein M represents at least one element selected from Mg, Al, Ca, Ti, V, Cr, Mn, Nb, Zr and Mo; b represents a numerical value satisfying the requirement represented by the formula 0.95 <= b <= 1.03; and x represents a numerical value satisfying the requirement represented by the formula 0 < x <= 0.15 and y represents a numerical value satisfying the requirement represented by the formula 0 <y <= 0.07, wherein the sum total of x and y is 0.16 or smaller, i.e., x+y <= 0.16) and secondary particles that are aggregates of the primary particles, wherein microparticles containing W and Li are present on the surface of each of the primary particles, and the length of axis-c of the lithium nickel composite oxide is 14.183 angstroms or more as determined by a Rietveld analysis of X-ray diffraction data on the oxide.

Description

technical field [0001] The present invention relates to a positive electrode active material for a nonaqueous electrolyte secondary battery, a method for producing the same, and a nonaqueous electrolyte secondary battery using the positive electrode active material. Background technique [0002] In recent years, with the rapid development of small electronic devices such as mobile phones and notebook computers, the demand for non-aqueous electrolyte secondary batteries as a chargeable and dischargeable power source is rapidly increasing. [0003] Lithium cobaltate (LiCoO 2 ) represented lithium-cobalt composite oxide, lithium nickelate (LiNiO 2 ) represented lithium-nickel composite oxide, lithium manganate (LiMnO 2 ) as the representative lithium manganese composite oxide, etc. [0004] Lithium cobalt oxide has problems in that cobalt contained as a main component is expensive due to a small amount of reserves, and the supply is unstable and the price fluctuates greatly....

Claims

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Application Information

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IPC IPC(8): H01M4/525H01M4/36H01M4/505C01G53/00
CPCH01M4/505H01M4/525Y02E60/10C01G53/42C01P2002/52C01P2002/54C01P2002/77C01P2006/12C01P2004/45C01P2004/51C01P2004/61H01M10/052H01M50/109H01M2220/30H01M10/0566C01G53/04C01P2006/82H01M4/364Y02P70/50C01G53/00H01M4/36H01M4/0471H01M4/366H01M4/382H01M4/485H01M2004/028
Inventor 横山润古市佑树中山朋子小向哲史森建作山内充
Owner SUMITOMO METAL MINING CO LTD
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