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Additive, non-aqueous electrolyte for lithium secondary battery comprising same, and lithium secondary battery comprising same

A non-aqueous electrolyte and lithium secondary battery technology, which is applied in non-aqueous electrolyte batteries, secondary batteries, secondary battery repair/maintenance, etc., can solve the problems of battery structure deformation, gas generation, electrolyte oxidation reaction, etc., and achieve inhibition Decomposition reaction, effect of improving life characteristics and storage performance

Active Publication Date: 2019-12-13
LG ENERGY SOLUTION LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, if a lithium secondary battery using a liquid electrolyte is stored at a high temperature for a long time, an oxidation reaction of the electrolyte may occur on the surfaces of the two electrodes, and gas may be generated, thereby deforming the battery structure

Method used

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  • Additive, non-aqueous electrolyte for lithium secondary battery comprising same, and lithium secondary battery comprising same
  • Additive, non-aqueous electrolyte for lithium secondary battery comprising same, and lithium secondary battery comprising same
  • Additive, non-aqueous electrolyte for lithium secondary battery comprising same, and lithium secondary battery comprising same

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Embodiment approach

[0088] Hereinafter, the present invention will be described in more detail with reference to preferred embodiments. However, the embodiments are only for helping understanding of the present invention and should not be construed as limiting the scope of the present invention. It will be apparent to those skilled in the art that various changes and modifications are apparent within the scope and technical spirit of the present specification, and such changes and modifications are bound to be included in the scope of the appended claims.

Embodiment 1

[0091] (1) Preparation of non-aqueous electrolyte for lithium secondary battery

[0092] Ethylene carbonate (EC) and ethyl methyl carbonate (EMC) were mixed in a ratio of 30:70 (vol%), and LiPF 6 An organic solvent was prepared by dissolving in it to achieve a concentration of 1M. Then, 1.0 g of the compound of Formula 1-1 was added as an additive to 99 g of an organic solvent to prepare a non-aqueous electrolyte for a lithium secondary battery.

[0093] (2) Manufacture of positive electrode

[0094] To 100 parts by weight of N-methyl-2-pyrrolidone (NMP) solvent, 40 parts by weight of solids were added to prepare a positive electrode mixture slurry by mixing the positive electrode active material ( Li(Ni 0.5 Mn 0.3 Co 0.2 )O 2 ): conductive agent (carbon black): binder (polyvinylidene fluoride (PVDF)). Then, a positive electrode current collector (Al thin film) with a thickness of 100 μm was coated with the positive electrode mixture slurry, and dried and rolled to manu...

Embodiment 2

[0100] During the preparation of the non-aqueous electrolyte for a lithium secondary battery in Example 1, lithium disulfide was produced by the same method as described in Example 1, except that the compound of Formula 1-2 was used instead of the compound of Formula 1-1 as an additive Non-aqueous electrolyte for secondary battery and lithium secondary battery containing the same.

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Abstract

The present invention relates to an additive comprising at least one compound selected from the group consisting of compounds represented by chemical formulas 1 and 2; and a non-aqueous electrolyte for a lithium secondary battery and a lithium secondary battery which comprise the same.

Description

technical field [0001] Cross References to Related Applications [0002] This application claims the benefit of Korean Patent Application No. 10-2017-0155471 filed with the Korean Intellectual Property Office on November 21, 2017, the disclosure of which is hereby incorporated by reference in its entirety. technical field [0003] The present invention relates to an additive, a non-aqueous electrolyte for a lithium secondary battery containing the additive, and a lithium secondary battery containing the non-aqueous electrolyte, and more particularly, to improving the life characteristics and high-temperature storage performance of a lithium secondary battery additives, non-aqueous electrolytes for lithium secondary batteries containing the additives, and lithium secondary batteries containing the non-aqueous electrolytes. Background technique [0004] With the development of technology and the increase in demand for mobile devices, the demand for secondary batteries as ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0567H01M10/42H01M10/052C07F9/14C07F9/09
CPCH01M10/0567C07F9/09C07F9/14H01M10/0525Y02E60/10H01M10/4235H01M10/052C07F9/091H01M10/0568H01M10/0569H01M2300/0037
Inventor 俞成勋李哲行姜有宣
Owner LG ENERGY SOLUTION LTD
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