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Electrolyte for lithium secondary battery and lithium secondary battery comprising same

A lithium secondary battery and electrolyte technology, which is applied in the field of low-temperature electrolyte and lithium secondary batteries, can solve the problems of low lithium ion mobility and deterioration of discharge characteristics, etc.

Inactive Publication Date: 2006-08-23
SAMSUNG SDI CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when a Li-ion battery is discharged at a high rate (1C), its discharge characteristics deteriorate rapidly because the mobility of Li ions is too low at low temperatures, especially at -20°C

Method used

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  • Electrolyte for lithium secondary battery and lithium secondary battery comprising same
  • Electrolyte for lithium secondary battery and lithium secondary battery comprising same
  • Electrolyte for lithium secondary battery and lithium secondary battery comprising same

Examples

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Embodiment 1～18

[0043] The electrolyte solution of embodiment 1~18 is prepared according to the following method: the LiPF of 1M 6 Join in the non-aqueous organic solvent, contain ethylene carbonate (EC) and dimethyl carbonate (DMC) mixed with the volume ratio 1:1 in this non-aqueous organic solvent, then the organic compound shown in table 1 is added to in solvent.

[0044] organic compound

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Abstract

PURPOSE: Provided are a non-aqueous electrolyte capable of improving the electrochemical property, and a lithium secondary cell excellent in electrochemical property. CONSTITUTION: The electrolyte comprises a lithium salt; a non-aqueous, organic solvent; and at least one of organic compound selected from compounds of formula 1 to 4(wherein the formula 3 is R9-SO3-Si-(CmH2m+1)3 and formula 4 is CnX2n+1-SO3-Si(CmH2m+1)3). In the formulae, each of R1 to R9 independently represents primary, secondary, or tertiary alkyl group, alkenyl group or aryl group, X is hydrogen or halogen atom, and each of n and m is 0-3. The lithium salt is selected from the group consisting of lithium hexafluorophosphate(LiPF6), lithium tetrafluoroborate(LiBF4), lithium perchlorate(LiClO4), lithium trifluoromethanesulfonate(LiCF3SO3), lithium hexafluoroarsenate(LiAsF6), and mixture thereof.

Description

[0001] This application is a divisional application of the national application with the application date of May 10, 2002, the application number 02119206.5, and the title "Electrolyte for Lithium Secondary Battery and Lithium Secondary Battery Containing the Electrolyte". [0002] Cross-reference search of related applications [0003] This application is based on applications 2001-25763 and 2001-25764 filed with the Korean Patent Office on May 11, 2001, the contents of which are incorporated herein by reference. field of invention [0004] The present invention relates to an electrolyte solution for a lithium secondary battery, and to a lithium secondary battery containing the electrolyte, more particularly to an electrolyte capable of improving the low-temperature characteristics of a lithium secondary battery, and a lithium secondary battery containing the electrolyte secondary battery. Background of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/40H01M10/0565H01M10/0525H01M10/0569
CPCH01M10/0567Y02E60/122H01M10/052Y02E60/10H01M10/0525H01M10/0565H01M10/0569
Inventor 金镇诚白旻善朴晸俊金荣圭金钟涉金学洙李尚俊罗载澔黄相文金赞中
Owner SAMSUNG SDI CO LTD
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