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Method of manufacturing cathode active material

A technology of positive active material and manufacturing method, which is applied in the direction of active material electrode, electrode manufacturing, positive electrode, etc., and can solve the problems of battery fire and scrapping

Inactive Publication Date: 2009-08-19
SONY CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the battery may catch fire and fail

Method used

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  • Method of manufacturing cathode active material
  • Method of manufacturing cathode active material
  • Method of manufacturing cathode active material

Examples

Experimental program
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Effect test

Embodiment 1

[0114] First, nickel sulfate, cobalt sulfate and sodium aluminate were dissolved in water and stirred well, while sodium hydroxide solution was added to obtain a nickel-cobalt-aluminum composite coprecipitation with a molar ratio of Ni:Co:Al=77:20:3 hydroxide. Next, a precursor having a molar ratio of Li:(Ni+Co+Al)=105:100 was obtained by rinsing and drying the coprecipitated hydroxide with water and adding lithium hydroxide hydrate. The precursor was calcined at a temperature of 700° C. for 10 hours in an oxygen atmosphere, cooled to room temperature, and then pulverized, so as to be able to obtain a compound having a composition of Li 11.03 Ni 0.77 Co 0.20 Al 0.03 O 2 Composite oxide particles of lithium nickelate as the main component. In addition, the average particle diameter of the obtained composite oxide particles was measured by a laser light scattering method, and the obtained diameter value was 13 μm.

[0115] 100 parts by weight of the composite oxide particl...

Embodiment 2

[0117] Different from Example 1, the positive active material was prepared by using 0.34 parts by weight of ammonium pentaborate ((NH 4 ) 2 ·5B 2 O 3 ·8H 2 O) instead of 0.83 parts by weight of ammonium sulfate ((NH 4 ) 2 SO 4 ) obtained. Other conditions were set to be the same as those of Example 1.

Embodiment 3

[0119] Different from Example 1, the positive active material was prepared by using 0.83 parts by weight of ammonium sulfate ((NH 4 ) 2 SO 4 ) and 0.17 parts by weight of ammonium pentaborate ((NH 4 ) 2 ·5B 2 O 3 ·8H 2 O) mixture instead of 0.83 parts by weight of ammonium sulfate ((NH 4 ) 2 SO 4 ) obtained. Other conditions were set to be the same as those of Example 1.

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Abstract

A method of manufacturing a cathode active material is provided. The method includes the step of precipitating step for providing a solution of a deposition component onto composite oxide particles including lithium Li and nickel Ni, removing a solvent from the solution on the composite oxide particles within a short time period, and precipitating the deposition component on surfaces of the composite oxide particles; and heating step for heating under an oxidation atmosphere the composite oxide particles with the deposition component precipitated on the surfaces.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS [0002] The present application contains subject matter related to that disclosed in Japanese Patent Application JP 2008-031344 filed in the Japan Patent Office on Feb. 13, 2008, the entire content of which is hereby incorporated by reference. technical field [0003] The present invention relates to a method for producing a positive electrode active material, and more particularly, to a method for producing a positive electrode active material having a composite oxide material containing lithium (Li) and nickel (Ni). Background technique [0004] Recently, with the widespread use of portable devices such as video cameras and portable personal computers, small-sized and high-capacity secondary batteries are urgently required. In the past, nickel-hydrogen batteries or nickel-cadmium batteries containing an alkaline electrolyte have been used as secondary batteries. However, due to their low battery voltage of about 1.2V, it is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/04H01M4/48H01M4/52H01M4/62H01M4/505C01G53/00H01M4/525
CPCY02E60/122H01M2004/028H01M4/525H01M4/131H01M4/139H01M4/485Y02E60/10H01M4/04
Inventor 渡边春夫大山有代东秀人藤田茂
Owner SONY CORP
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