Nonaqueous electrolyte secondary battery

A non-aqueous electrolyte, secondary battery technology, applied in non-aqueous electrolyte storage batteries, secondary batteries, battery electrodes, etc., can solve the problems of not seeing sufficient improvement, not finding cycle characteristics and high temperature storage characteristics, etc. Suppression of side reactions, balance between cycle characteristics and high-temperature storage characteristics, and high-capacity effects

Active Publication Date: 2008-02-06
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But in the case of using nickel as transition metal, no sufficient improvement can be seen
[0011] As mentioned above, with regard to the improvement of lithium nickel oxide, the actual situation is that no effective means have been found to balance the cycle characteristics and high-temperature storage characteristics without compromising the original high-capacity advantages of nickel.

Method used

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  • Nonaqueous electrolyte secondary battery
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  • Nonaqueous electrolyte secondary battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0094] Composite oxides having compositions and physical properties of Nos. 1 to 31 shown in Tables 1 to 4 were prepared as positive electrode active materials by the following method, and Batteries 1 to 31 were fabricated using the positive electrode active material.

[0095] (i) Preparation of positive electrode active material

[0096] Process a

[0097] Prepare and dissolve nickel sulfate, cobalt sulfate, element M 1 salt and element M 2 salt solution of metal salts. The concentration of nickel sulfate in the above-mentioned metal salt aqueous solution is set as 1mol / L, and the concentration of other salts is adjusted appropriately according to Table 1.

[0098] With stirring, the above metal salt aqueous solution was maintained at 50° C., and an aqueous solution containing 30% by weight of sodium hydroxide was added dropwise thereto to bring the pH to 12, whereby hydroxide was precipitated. The hydroxide precipitate was filtered, washed with water, and dried in air. ...

Embodiment 2

[0154] Except that the composition and physical properties of the positive electrode active material were changed to No. 38-45 shown in Table 7 and Table 8, the composite oxide was prepared in the same manner as in Example 1, and a battery was fabricated in the same manner as in Example 1 using the composite oxide. 38~45.

[0155] Table 7

[0156] Li x Ni 1-y-z-v-w co y Al z m 1 v m 2 w o 2

No.

M 1

M 2

x

y

z

v

w

v / w

comparative example

38

mn

Mg, Ca

1

0.15

0.03

0.00005

0.005

0.01

Example

39

mn

Mg, Ca

1

0.15

0.03

0.0001

0.005

0.02

Example

40

mn

Mg, Ca

1

0.15

0.03

0.0005

0.005

0.1

Example

41

mn

Mg, Ca

1

0.15

0.03

0.0015

0.005

0.3

Example

42

mn

Mg, Ca ...

Embodiment 3

[0166] Except that the composition and physical properties of the positive electrode active material were changed to No. 46-53 shown in Table 9 and Table 10, the composite oxide was prepared in the same manner as in Example 1, and a battery was fabricated in the same manner as in Example 1 using the composite oxide. 46-53.

[0167] Table 9

[0168] Li x Ni 1-y-z-v-w co y Al z m 1 v m 2 w o 2

No.

M 1

M 2

x

y

z

v

w

v / w

comparative example

46

mn

Mg, Ca

1

0.15

0.03

0.005

0.00005

100.00

Example

47

mn

Mg, Ca

1

0.15

0.03

0.005

0.0001

50.00

Example

48

mn

Mg, Ca

1

0.15

0.03

0.005

0.0005

10.00

Example

49

mn

Mg, Ca

1

0.15

0.03

0.005

0.0015

3.33

Example

50

mn

M...

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Abstract

A lithium-containing complex oxide represented by the following formula 1: LixNi1-y-z-v-wCoyAlzM1

Description

technical field [0001] The present invention relates to a non-aqueous electrolyte secondary battery, and in detail, relates to an improvement of a positive electrode active material of a non-aqueous electrolyte secondary battery. Background technique [0002] In recent years, the portability and cordlessness of civil electronic equipment have developed rapidly. This places a higher demand on small, light-weight and high-energy-density secondary batteries used as power sources for driving these devices. From such viewpoints, expectations for non-aqueous electrolyte secondary batteries, particularly lithium secondary batteries having high voltage and high energy density, are increasing, and development thereof is imminent. [0003] A nonaqueous electrolyte secondary battery has a positive electrode, a negative electrode, and a separator interposed between the positive electrode and the negative electrode. As the separator, a microporous film made of polyolefin is mainly used...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/58C01G53/00H01M4/02H01M4/04H01M10/40H01M4/48H01M4/485H01M4/50H01M4/505H01M4/52H01M4/525H01M10/05H01M10/052H01M10/0566H01M10/36
CPCY02E60/122H01M4/485C01P2004/62H01M4/131H01M2004/021C01P2004/51C01P2002/52C01G53/42H01M4/525H01M10/052C01P2004/61H01M4/505C01P2006/40C01P2006/12C01P2006/11H01B1/122Y02E60/10
Inventor 竹内崇谷口明宏堤修司名仓健祐松野博笹冈英雄松本哲
Owner PANASONIC CORP
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