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Anhydrous electrolyte of lithium storage battery, and lithium storage battery containing said electrolyte

A lithium secondary battery and electrolyte technology, applied in non-aqueous electrolyte batteries, secondary batteries, lithium batteries, etc., can solve problems such as instability, reduced ion mobility, and increased internal pressure.

Inactive Publication Date: 2002-11-20
SAMSUNG SDI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are many problems with these methods: the added compound interacts with the carbon anode due to its inherent electrochemical characteristics during the initial charge and discharge, or decomposes or forms an unstable film, resulting in a decrease in ion mobility in the electrolyte; Gas is generated inside the battery, causing an increase in internal pressure, resulting in significant deterioration of storage characteristics, safety, cycle life characteristics, and capacity characteristics of the battery

Method used

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  • Anhydrous electrolyte of lithium storage battery, and lithium storage battery containing said electrolyte
  • Anhydrous electrolyte of lithium storage battery, and lithium storage battery containing said electrolyte
  • Anhydrous electrolyte of lithium storage battery, and lithium storage battery containing said electrolyte

Examples

Experimental program
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Effect test

Embodiment 1

[0075] Ethylene carbonate / dimethyl carbonate (EC / DMC) were mixed in a volume ratio of 1:1 to prepare an anhydrous organic solution. To this solution was added 1M LiPF 6 , and further add 0.25% of the total weight of the electrolyte acrylonitrile to prepare the electrolyte.

Embodiment 2

[0077] An electrolytic solution was prepared in the same manner as in Example 1, except that 0.5% acrylonitrile by the total weight of the electrolytic solution was added to the solution instead of 0.25% acrylonitrile.

Embodiment 3

[0079] An electrolyte was prepared in the same manner as in Example 1, except that 1.0% of acrylonitrile by the total weight of the electrolyte was added to the solution instead of 0.25% of acrylonitrile.

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Abstract

An electrolyte for a lithium secondary battery is provided. The electrolyte includes a lithium salt, a non-aqueous organic solvent, and a compound represented by Formula (1): wherein R1, R2, and R3 are each independently selected from the group consisting of hydrogen, primary, secondary, and tertiary alkyl groups, alkenyl groups, and aryl groups. The compound of the present invention is decomposed earlier than an electrolytic organic solvent, and an organic SEI film is formed on a negative electrode, thereby inhibiting the electrolytic organic solvent from decomposing.

Description

[0001] Cross References to Related Applications [0002] This application is based on Korean Patent Application No. 2001-25537 filed with the Korean Industrial Property Office on May 10, 2001, and Japanese Patent Application No. 2001-110350 filed with the Japan Patent Office on April 9, 2001, which disclose The contents are incorporated herein by reference. field of invention [0003] The present invention relates to a non-aqueous electrolyte solution for a lithium secondary battery and a lithium secondary battery comprising the same, and more particularly, to a lithium battery capable of preventing the thickness of the battery from expanding when charged at room temperature or when stored at a high temperature after charging. An anhydrous electrolytic solution for a secondary battery, and a lithium secondary battery containing the electrolytic solution. Background of the invention [0004] Due to the development of the high-tech electronics industry, the use of portable el...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/052H01M10/0525H01M10/0565H01M10/0567H01M10/0569H01M10/36
CPCH01M10/052H01M10/0525H01M10/0565H01M10/0567H01M10/0569Y02E60/10Y10T29/49108
Inventor 金镇诚黄相文清水竜一山口滝太郎白旻善李镇旭郑喆洙
Owner SAMSUNG SDI CO LTD
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