Non-water electrolyte composition for raising overcharge safety and lithium cell using said composition

A non-aqueous electrolyte, lithium battery technology, applied in non-aqueous electrolyte batteries, non-aqueous electrolyte batteries, batteries with organic electrolytes, etc., can solve problems such as battery expansion, formation, standard capacity or cycle characteristics deterioration.

Inactive Publication Date: 2003-05-21
SAMSUNG SDI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, such a general-purpose additive may polymerize or may generate a large amount of gas due to oxidative decomposition even under normal operating conditions, thereby causing the battery to swell. Such as deterioration of formation, standard capacity or cycle characteristics

Method used

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  • Non-water electrolyte composition for raising overcharge safety and lithium cell using said composition
  • Non-water electrolyte composition for raising overcharge safety and lithium cell using said composition
  • Non-water electrolyte composition for raising overcharge safety and lithium cell using said composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] LiPF as lithium salt 6 Dissolved in a mixed solvent of ethylene carbonate (EC) / ethylmethyl carbonate (EMC) / propylene carbonate (PC) / fluorobenzene (FB) (volume ratio 30 / 55 / 5 / 10) to get mixed solution, where LiPF 6 The final concentration was 1.15M. 3 wt % (based on the total amount of the mixed solution) of o-benzylbiphenyl represented by structural formula 3 was added to the mixed solution to obtain the desired electrolyte. Structural formula 3 is:

[0064] Formula 3

Embodiment 2

[0066] LiPF as lithium salt 6 Dissolve in the mixed solvent of EC / EMC / PC / FB (volume ratio is 30 / 55 / 5 / 10) to obtain mixed solution, wherein LiPF 6 The final concentration was 1.15M. 5 wt% (based on the total amount of the mixed solution) of o-benzylbiphenyl represented by structural formula 3 was added to the mixed solution to obtain the desired electrolyte.

Embodiment 3

[0068] LiPF as lithium salt 6 Dissolve in the mixed solvent of EC / EMC / PC / FB (volume ratio is 30 / 55 / 5 / 10) to obtain mixed solution, wherein LiPF 6 The final concentration was 1.15M. 10 wt% (based on the total amount of the mixed solution) of o-benzylbiphenyl represented by structural formula 3 was added to the mixed solution to obtain the desired electrolyte.

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Abstract

Provided is a nonaqueous electrolyte for use in improving overcharge safety in a lithium battery includes an organic solvent, a lithium salt, and a benzyl biphenyl compound, a hydride thereof or a mixture thereof.

Description

[0001] Cross References to Related Applications [0002] This application claims priority from Korean Applications 2001-64940 and 2001-64948 filed with the Korean Intellectual Property Office on October 20, 2001, the disclosures of which are incorporated herein by reference. technical field [0003] The invention relates to a nonaqueous electrolytic solution for improving overcharging safety and a lithium battery using the electrolytic solution. Background technique [0004] With the development of advanced electronic equipment, there is an increasing demand for small, lightweight, and portable electronic equipment and devices. Therefore, batteries with high energy density characteristics are required to provide power for such equipment and devices, and for such Research on lithium batteries is currently underway. [0005] A lithium battery includes a cathode, an anode, an electrolyte that provides a movement path for lithium ions between the cathode and anode, and a separa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M6/16H01M6/18H01M10/05H01M10/052H01M10/0567H01M10/42
CPCH01M10/0567H01M6/168H01M10/4235H01M2300/0037H01M10/0525Y02E60/122Y02E60/10
Inventor 崔相勋卢亨坤李夏英宣熙英金昊星
Owner SAMSUNG SDI CO LTD
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