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Secondary cell with nonaqueous electrolyte

A non-aqueous electrolyte, secondary battery technology, applied in non-aqueous electrolyte batteries, non-aqueous electrolyte storage batteries, non-aqueous electrolytes, etc., can solve problems such as insufficient inhibition of battery expansion

Inactive Publication Date: 2003-05-14
GS YUASA INT LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method is not sufficient for suppressing battery swelling, and it is expected to develop an additive with a better swelling suppressing effect

Method used

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  • Secondary cell with nonaqueous electrolyte

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Embodiment Construction

[0014] The present invention is characterized in that a nonaqueous electrolyte secondary battery contains at least one sultone compound having an unsaturated bond in its nonaqueous electrolyte.

[0015] Here, the sultone compound having an unsaturated bond refers to a substance represented by the chemical formula (1), wherein R 1 ~R 4 These are compounds having a hydrogen atom, or the same or different kinds of alkyl groups, alkoxy groups, halogens, halogen-containing alkyl groups, and aromatic groups (any of which may have an unsaturated bond). The aforementioned compounds specifically refer to 1,3-(1-propenyl)sultone, 1,3-(1-butenyl)sultone, 1,3-(2-methyl-1-propenyl)sulfone Lactone, 2,4-(2-butenyl) sultone and other compounds.

[0016] Chemical formula (1)

[0017] (where, R 1 -R 4 Compounds containing hydrogen atoms, or the same or different types of alkyl, alkoxy, halogen, halogen-containing alkyl, and aryl groups)

[0018] According to the present invention, high-...

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Abstract

The present invention is characterized in that a nonaqueous electrolyte contains a sultone compound having unsaturated bonds, and the present invention thereby aims at suppressing the swelling of a nonaqueous electrolyte secondary battery, as represented by a lithium secondary battery, after being allowed to stand at a high temperature and at obtaining an excellent high temperature standing performance. Furthermore, by making the nonaqueous electrolyte contain, in addition to the sultone compound containing unsaturated bonds, a vinylene carbonate derivative in 1.0 wt % or below, and / or a cyclic sulfate in 2.0 wt % or below, there can be obtain a nonaqueous electrolyte secondary battery which prevents the initial discharge capacity degradation, occurring when the addition amount of the sultone compound having unsaturated bonds is increased, and has an excellent high temperature standing performance and a large initial discharge capacity.

Description

technical field [0001] The invention relates to a nonaqueous electrolyte secondary battery having an unsaturated bond sultone compound in the nonaqueous electrolyte. Background technique [0002] Recently, with the advancement of electronic technology, the trend of increasing the performance of electronic appliances such as mobile phones, notebook computers, and cameras, and reducing their size and weight is rapidly progressing, and a high-energy-density battery that can be used in the above-mentioned electronic appliances is in great demand. A typical battery that can meet the above requirements is a lithium secondary battery in which lithium is used as the negative electrode active material. [0003] This lithium battery consists of a negative plate, a positive plate, an electrolyte, and a separator interposed between the positive and negative plates to prevent short circuits. For example, the negative plate is a carbonaceous material that absorbs / releases lithium ions fi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/05H01M6/16H01M10/0567H01M10/42
CPCH01M2300/0037H01M10/0567Y02E60/122H01M2300/0025H01M10/4235H01M10/052Y02E60/10
Inventor 森澄男
Owner GS YUASA INT LTD
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