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Nonaqueous electrolyte and lithium secondary battery using same

一种非水电解质、锂二次电池的技术，应用在非水电解质蓄电池、非水电解质、二次电池等方向，能够解决劣化等问题

Active Publication Date: 2014-04-16
LG ENERGY SOLUTION LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, changing the solvent composition or adding some compounds is known to improve some properties of the battery, but may also degrade any other properties

Method used

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  • Nonaqueous electrolyte and lithium secondary battery using same
  • Nonaqueous electrolyte and lithium secondary battery using same
  • Nonaqueous electrolyte and lithium secondary battery using same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-1

[0105] Fluoroethylene carbonate (FEC), ethylene carbonate (EC) and methyl propionate (MP) were mixed in a volume ratio (volume %) of 30:5:65 to obtain an organic solvent mixture in which the organic solvent The fluorine content in the mixture was 5.4% by weight.

[0106] Add 1 part by weight of pyrimidine and 3 parts by weight of 1,3-propane sultone, based on 100 parts by weight of the mixture, and LiPF 6 Dissolve in it until 1M LiPF is obtained 6 solution to prepare a non-aqueous electrolyte solution.

Embodiment 1-2

[0108] Repeat the steps of Example 1-1, except that fluoroethylene carbonate (FEC), ethylene carbonate (EC) and methyl propionate (MP) are mixed in a volume ratio of 20:15:65 (volume %), And the content of fluorine present in the organic solvent mixture was 3.6% by weight to prepare a non-aqueous electrolyte solution.

Embodiment 1-3

[0110] Repeat the steps of Example 1-1, except that fluoroethylene carbonate (FEC), ethylene carbonate (EC) and methyl propionate (MP) are mixed in a volume ratio of 10:25:65 (volume %), And the content of fluorine present in the organic solvent mixture was 1.8% by weight to prepare a non-aqueous electrolyte solution.

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Abstract

Disclosed are a nonaqueous electrolyte for a lithium secondary battery, comprising a pyrimidine-based compound, a nonfluorinated solvent, and a fluorinated solvent, and a lithium secondary battery using the nonaqueous electrolyte.

Description

technical field [0001] The present invention relates to a non-aqueous electrolyte solution for a lithium secondary battery, comprising a non-fluorinated solvent, a fluorinated solvent, and a pyrimidine-based compound, and a lithium secondary battery using the non-aqueous electrolyte solution. [0002] This application claims priority from Korean Patent Application No. 10-2011-0071060 filed in Korea on Jul. 18, 2011, the entire contents of which are incorporated herein by reference. [0003] This application also claims priority to Korean Patent Application No. 10-2012-0078056 filed in Korea on Jul. 18, 2012, the entire contents of which are incorporated herein by reference. Background technique [0004] Recently, there has been a growing interest in energy storage technologies. As energy storage technology extends to devices such as cellular phones, camcorders, and notebook computers, and also to electric vehicles, the demand for high energy density of batteries used as pow...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0567H01M10/0566H01M4/525H01M4/505H01M10/052
CPCH01M2300/0037H01M10/0567H01M2300/004H01M2300/0042H01M10/052H01M2300/0034H01M10/0569Y02E60/122Y02E60/10H01M4/36H01M10/0566
Inventor 俞成勋梁斗景曹旼廷金庾锡姜有宣
Owner LG ENERGY SOLUTION LTD
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