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Lithium ion battery electrolyte

A lithium-ion battery and electrolyte technology, which is applied in the direction of lithium batteries, secondary batteries, organic electrolytes, etc., can solve the problems of insufficient cycle performance of flame-retardant electrolytes, and achieve good cycle performance, flame-retardant safety, and stable cycle performance , The effect of small change in internal resistance

Active Publication Date: 2018-09-14
NANTONG CAPCHEM ELECTRONICS MATERIALS CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by this invention is to provide an improved lithium-ion battery electrolyte for the insufficient cycle performance of the flame-retardant electrolyte in the prior art

Method used

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Examples

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Embodiment 1

[0032] In a nitrogen-protected glove box (moisture 6 ), then add other additives and flame retardant additives of the specified species and content in Table 1, and obtain the lithium-ion battery electrolyte of embodiment 1 after stirring.

Embodiment 2～5

[0034] Under the same conditions as in Example 1, the ingredients of each example specified in Table 1 are formulated to obtain the lithium-ion battery electrolytes of Examples 2 to 5 respectively.

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Abstract

In order to solve the problem that in the prior art, electrolyte cannot simultaneously realize the electrochemical performance such as flame retardant performance and circulation cycle, the inventionprovides lithium ion battery electrolyte. The lithium ion battery electrolyte is prepared from lithium salt, an organic solvent and additives, wherein the additives include a phosphonitrile compound and perfluoro(2-methyl-3-pentanone). The lithium ion battery electrolyte provided by the invention has good cycle performance and flame retardant safety; a lithium ion battery using the electrolyte hasstable cycle performance at normal temperature and 45 DEG C; air expansion cannot occur when the lithium ion battery is stored in a 60-DEG C heat box; the internal resistance is small; good storage performance and cycle performance are maintained.

Description

technical field [0001] The invention belongs to the technical field of lithium-ion battery electrolytes, in particular to a lithium-ion battery electrolyte containing two flame-retardant additives. Background technique [0002] Lithium-ion batteries are composed of positive electrodes, negative electrodes, diaphragms, and electrolytes. Lithium-ion battery electrolytes accommodate and conduct ions between the positive and negative electrodes of the battery, enabling lithium-ion batteries to obtain high voltage and high specific energy. Guarantee of other advantages. Lithium-ion battery electrolytes are generally prepared from solvents, lithium salts, and additives in certain proportions. Lithium hexafluorophosphate (LiPF) is the most mature lithium salt used in the production of commercial lithium-ion batteries. 6 ), solvents are mainly carbonates and a small amount of carboxylic esters, such as: ethylene carbonate (EC), propylene carbonate (PC), dimethyl carbonate (DMC), e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0567H01M10/0525
CPCH01M10/0525H01M10/0567H01M2300/0025H01M10/052H01M10/0568H01M10/0569H01M10/4235H01M2300/0028Y02E60/10
Inventor 殷俊葛晓军郝敬磊丁祥欢
Owner NANTONG CAPCHEM ELECTRONICS MATERIALS CO LTD
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