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Cathode active material, method of producing the same and nonaqueous electrolyte secondary battery

A positive active material, non-aqueous electrolyte technology, applied in non-aqueous electrolyte batteries, active material electrodes, secondary batteries, etc., can solve the problem of deterioration of charging voltage cycle characteristics, and achieve good charge-discharge cycle characteristics and high energy density. Properties, the effect of inhibiting binding

Inactive Publication Date: 2011-10-12
SONY CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, an increase in charging voltage poses a problem regarding deterioration of cycle characteristics

Method used

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  • Cathode active material, method of producing the same and nonaqueous electrolyte secondary battery
  • Cathode active material, method of producing the same and nonaqueous electrolyte secondary battery
  • Cathode active material, method of producing the same and nonaqueous electrolyte secondary battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0166] First, the manufacturing method of the positive electrode active material used in this specific embodiment is shown below.

[0167] will have an average particle diameter of 13μm and a 0.3m 2 100 parts by weight of lithium cobaltate (average chemical composition analysis value of the specific surface area of ​​ / g: Li 1.03 CoO 2.02 ) was dispersed in 3000 parts by weight of an aqueous solution of 2N lithium hydroxide LiOH, and stirred at 80° C. for one hour. 11.15 parts by weight of commercially available reagent nickel nitrate Ni(NO 3 ) 2 ·6H 2 O and 3.67 parts by weight of commercially available reagent manganese nitrate Mn(NO 3 ) 2 ·6H 2 O was dissolved in 100 parts by weight of pure water, and the prepared solution was added to the above dispersion solution for two hours. Moreover, 1.33 parts by weight of commercially available reagent lanthanum nitrate La(NO 3 ) 2 ·6H 2 O was dissolved in 50 parts by weight of pure water, and the prepared solution was add...

Embodiment 2

[0174] A cylindrical secondary battery was manufactured in the same manner as in Example 1, but the amount of nickel nitrate added was changed to 14.87 parts by weight, the amount of manganese nitrate added was changed to 14.67 parts by weight, lanthanum sulfate La 2 (SO 4 ) 3 9H 2 The amount of O was changed to 0.45 parts by weight, and the amount of the lithium hydroxide aqueous solution for adjusting the amount of lithium was changed to 50 parts by weight.

Embodiment 3

[0176] A cylindrical secondary battery was manufactured in the same manner as in Example 1, but with 1.32 parts by weight of cerium nitrate Ce (NO 3 ) 3 ·6H 2 O replaced 1.33 parts by weight of lanthanum nitrate.

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Abstract

The invention discloses a cathode active material, manufacturing method thereof and nonaqueous electrolyte secondary battery. A cathode active material for nonaqueous electrolyte secondary battery is provided. The cathode active material includes: composite oxide particles containing at least lithium and cobalt; a coating layer disposed on at least a part of the surface of said composite oxide particles and including an oxide containing lithium and at least one coating element selected from nickel and manganese; and a surface layer disposed on at least a part of said coating layer and including an oxide containing at least one element selected from among lanthanoids. The invention improves chemical stability of the cathode active materia for the nonaqueous electrolyte secondary battery, thereby enhancing the functions and realizing high content of battery and the charging-discharging circulation characteristics.

Description

[0001] Cross References to Related Applications [0002] The present invention contains subject matter related to Japanese Patent Application JP 2007-166594 filed in the Japan Patent Office on Jun. 25, 2007, the entire content of which is hereby incorporated by reference. technical field [0003] The present invention relates to a positive electrode active material for a nonaqueous electrolyte secondary battery, a method for manufacturing the positive electrode active material and a nonaqueous electrolyte secondary battery, for example, relates to a positive electrode for a nonaqueous electrolyte secondary battery Active material including a composite oxide containing lithium Li and cobalt Co, a method of manufacturing the positive electrode active material and a nonaqueous electrolyte secondary battery using the positive electrode active material for nonaqueous electrolyte secondary batteries . Background technique [0004] In recent years, with the popularization of porta...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/48H01M4/58H01M4/04C01D15/00C01G1/02B22F1/02H01M10/0525C01G53/00H01M4/36H01M4/505H01M4/525
CPCC01G51/42C01G51/44C01G53/42C01P2002/52C01P2004/61C01P2004/62C01P2006/40H01M4/131H01M4/366H01M4/485H01M4/505H01M4/525H01M10/052H01M2004/028Y02E60/10H01M4/48H01M4/04
Inventor 渡边春夫大山有代细谷洋介东秀人藤田茂
Owner SONY CORP