Nickel composite hydroxide particle and production method therefor, positive electrode active material for secondary battery and production method therefor, and secondary battery

A cathode active material, composite oxide technology, applied in the field of high-capacity and high-safety non-aqueous electrolyte secondary batteries, can solve problems such as the inability to increase current density, achieve excellent cycle characteristics, improve cycle characteristics, suppress gas effect that occurs

Active Publication Date: 2019-07-09
SUMITOMO METAL MINING CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the contrary, if the reaction resistance is too high, it will be related to the problem that the current density cannot be increased, and it will lead to problems such as promotion of heat generation that limit the fundamental use of the battery, so it is not preferable.

Method used

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  • Nickel composite hydroxide particle and production method therefor, positive electrode active material for secondary battery and production method therefor, and secondary battery
  • Nickel composite hydroxide particle and production method therefor, positive electrode active material for secondary battery and production method therefor, and secondary battery
  • Nickel composite hydroxide particle and production method therefor, positive electrode active material for secondary battery and production method therefor, and secondary battery

Examples

Experimental program
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Effect test

Embodiment 1

[0224] By implementing the method of the present invention, that is, a series of steps of producing a nickel oxide with a predetermined composition, a step of producing a fired powder with a predetermined composition, and a step of washing the obtained fired powder with water and then drying the obtained fired powder, each product is manufactured. A lithium-nickel composite oxide in which the metal component reaches a specified molar ratio.

[0225] And, the specific surface area of ​​the obtained lithium-nickel composite oxide was determined.

[0226] Then, the obtained lithium-nickel composite oxide was used as a positive electrode active material by the method described above to form a positive electrode material, and a coin-type battery was fabricated using the positive electrode material.

[0227] In addition, each raw material used in the manufacture of lithium-nickel composite oxide is such that the molar ratio of each metal component in the lithium-nickel composite oxi...

Embodiment 2

[0237] Except setting the slurry concentration of the process of washing the calcined powder with water to 500 g / L, and washing with water after stirring for 20 minutes, the operation was carried out in the same manner as in Example 1 to produce a lithium-nickel composite oxide, and the obtained powder was measured. The composition and specific surface area, as well as the initial discharge capacity, positive electrode reaction resistance, cycle retention rate and DSC calorific value of the coin-type battery fabricated using the powder. The results are shown in Table 1, respectively.

Embodiment 3

[0239] A lithium-nickel composite oxide was produced in the same manner as in Example 1, except that the slurry concentration in the step of washing the calcined powder with water was 1500 g / L, and washing was performed after stirring for 60 minutes. The composition and specific surface area of ​​the obtained powder, and the initial discharge capacity, positive electrode reaction resistance, cycle retention, and DSC calorific value of coin-type batteries produced using the powder were measured. The results are shown in Table 1, respectively.

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Abstract

The objective of the invention is to provide a positive electrode active material for a nonaqueous electrolyte secondary battery, which is composed of a lithium nickel composite oxide and has excellent cycle characteristics, by further controlling the reaction resistance while holding high capacity and high safety; and to provide a production method therefor. A lithium nickel composite oxide is produced by following steps (i)-(iii): (i) a nickel oxide is prepared by roasting a nickel hydroxide and / or a nickel oxyhydroxide of a predetermined composition under a non-reducing atmosphere of 850 DEG C or less; (ii) the nickel oxide and a lithium compound are mixed at a predetermined molar ratio, and then calcined under an oxygen atmosphere at a temperature in the range of 650-850 DEG C; and (iii) calcined powder obtained is washed with water within a time satisfying the following formula, in a state of a predetermined slurry concentration, and then filtered and dried. B / 40<A<=B / 10, whereinthe A is the washing time indicated in unit of minute, and the B is the slurry concentration of the calcined powder indicated in unit of g / L.

Description

[0001] The application date is October 15, 2013, the application number is 201380052473.X, and the title of the invention is "nickel composite hydroxide particles and its manufacturing method, positive electrode active material for non-aqueous electrolyte secondary battery and its manufacturing method and Divisional application for non-aqueous electrolyte secondary battery". technical field [0002] 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 same. More specifically, it relates to a positive electrode active material for a non-aqueous electrolyte secondary battery composed of a lithium-nickel composite oxide which is high-capacity, inexpensive, and excellent in thermal stability and cycle characteristics, and its manufacturing method suitable for industrial production, and its use. A high-capacity and high-safety no...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G53/00H01M4/525H01M10/0525
CPCC01G53/42H01M4/525C01P2002/88C01P2002/52C01P2002/54C01P2006/12C01P2006/40H01M10/0525H01M2220/30Y02E60/10
Inventor 今泉心笹冈英雄保田晋一川建裕坂元隆宏
Owner SUMITOMO METAL MINING CO LTD
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