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Non equeous electrolyte battery

A non-aqueous electrolyte and battery technology, applied in non-aqueous electrolyte batteries, non-aqueous electrolyte batteries, electrolyte battery manufacturing, etc., can solve the problems of high self-discharge and poor storage resistance.

Inactive Publication Date: 2003-09-17
SONY CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, batteries using non-aqueous electrolytes obtained by dissolving electrolyte salts in non-aqueous solvents have too much self-discharge and poor storage resistance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0045] First, an elongated anode is fabricated as follows. Calculated by weight, 90 parts of graphite as negative electrode active material and 10 parts of polyvinylidene fluoride as binder were mixed together to prepare an anode composite mixture. These anode complex mixtures were dispersed in N-methyl-2-pyrrolidone to obtain slurries.

[0046] For the anode current collector, an elongated copper foil with a thickness of 10 μm can be used. The anode complex mixture slurry is coated on both surfaces of this current collector, dried, and the obtained product is molded under a prescribed pressure. The resulting product was cut into elements with a width of 56 mm, thereby forming elongated anodes.

[0047] On the other hand, an elongated cathode was produced in the following manner. First, a positive electrode active material was produced in the following manner. In order to obtain the positive electrode active material (LiCoO 2 ), lithium carbide and cobalt carbonate were m...

example 2

[0068] A cylindrical nonaqueous electrolyte secondary battery was manufactured in the same manner as in Example 1 except that the concentration of vinylene carbonate was 3% by volume.

example 3

[0070] A cylindrical nonaqueous electrolyte secondary battery was produced in the same manner as in Example 1 except that the concentration of vinylene carbonate was 5% by volume.

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Abstract

A nonaqueous electrolyte battery includes: a cathode using a composite compound of lithium and a transition metal as a positive electrode active material; an anode using a negative electrode active material capable of doping or extracting lithium; and a nonaqueous electrolyte sandwiched between the anode and the cathode. By dissolving LiMFm (where M is an element selected from As, B, P and Sb, and m is an integer ranging from 4 to 6) and LiCnF2n+1SO3 or LiN(CnF2n+1SO2)2 in the In the non-aqueous solvent of cyclic carbonate or non-cyclic carbonate, add more than or equal to 0.1 volume % and less than or equal to 5 volume % of unsaturated carbonate to obtain non-aqueous electrolyte solution, LiCnF2n+1SO3 or LiN (CnF2n+ The concentration of 1SO2)2 is greater than or equal to 1 wt% and less than 10 wt%. Therefore, self-discharge is suppressed, and storage resistance is improved.

Description

technical field [0001] The present invention relates to a nonaqueous electrolyte battery, and more particularly, the present invention relates to a nonaqueous electrolyte battery in which self-discharge is suppressed while storage resistance is improved. [0002] The patent application of the present invention claims priority from the Japanese patent application No. 2002-024243 filed on January 31, 2002, and the entire content of the above Japanese patent application is hereby incorporated by reference. Background technique [0003] Using the latest advances in electronic technology, electronic devices such as video cameras with video tape recorders, mobile phones, laptop computers, etc. have been developed. As a portable power source used in these electronic devices, it is urgent to develop a high-energy-density, compact, and lightweight storage battery. [0004] As a storage battery satisfying these requirements, a nonaqueous electrolyte storage battery using a light meta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/05H01M4/02H01M4/36H01M6/16H01M10/04H01M10/0525H01M10/0567H01M10/0568H01M10/0569H01M10/0587
CPCH01M4/405H01M4/485H01M4/587H01M10/0431H01M10/0525H01M10/0566H01M10/0568H01M10/0569Y02E60/10Y02P70/50H01M10/05H01M10/058H01M4/48H01M4/58
Inventor 鹈川晋作桑田登起夫
Owner SONY CORP
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