Electrolyte for secondary battery and secondary battery comprising same
A technology for secondary batteries and electrolytes, applied in secondary batteries, secondary battery repair/maintenance, organic electrolytes, etc., can solve problems such as drive battery deterioration, low ionic conductivity, low ionic conductivity, and battery charge-discharge performance. , to achieve the effect of improving performance
Active Publication Date: 2020-03-31
LG ENERGY SOLUTION LTD +1
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- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0012] The prior art literature has contributed to some extent to improve the driving performance and stability of multivalent ion batteries, however, the effect is not enough
In addition, the electrolyte still has low ionic conductivity and battery charge-discharge performance, and electrolytes using sulfone-based solvents show high viscosity and low ionic conductivity at room temperature due to their high boiling point, which causes deterioration during driving the battery , and ultimately lead to limited battery performance
Method used
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Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0108] to dipropyl sulfone (DPSO 2 ) and tetrahydrofuran (THF) in an organic solvent mixed at a volume ratio of 1:1, MgCl was added at a concentration of 0.8M 2 As an electrolyte salt, and 2% by weight of tris(trimethylsilyl)phosphite was added as an additive to prepare an electrolyte for a secondary battery.
Embodiment 2
[0110] An electrolyte was prepared in the same manner as in Example 1, except that hexamethyldisilazane was added instead of tris(trimethylsilyl)phosphite as an additive at the same content.
Embodiment 3
[0112] An electrolyte was prepared in the same manner as in Example 1, except that heptamethyldisilazane was added instead of tris(trimethylsilyl)phosphite as an additive at the same content.
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Abstract
The present invention relates to an electrolyte for a secondary battery and a secondary battery comprising the same, and more specifically, to an electrolyte for secondary battery which comprises electrolytic salts, organic solvents, and additives, wherein the additives comprise at least one kind of compound selected from a group consisting of compounds having an N-Si-based bond and compounds having an O-Si-based bond. Since the electrolyte for a secondary battery includes an additive comprising specific chemical bonds, it is possible to improve the efficiency and lifetime characteristics of the multivalent metal secondary battery by suppressing film formation on a surface of the multivalent metal.
Description
technical field [0001] This application requirement for the rights and interests of the South Korean patent application number 10-2017-0103526 submitted to the South Korean Intellectual Property Office on August 16, 2017. The public content of the Korean patent application is incorporated into this article in a cited manner. [0002] The invention involves a secondary battery for a secondary battery and a secondary battery containing the electrolyte. Background technique [0003] As electronic devices and communication devices have recently become smaller, lighter, and more complicated, the necessity of electric vehicles in environmental problems has been highly prominent, and the secondary battery that can be used as the energy of these products has been in -depth. Research. In many secondary batteries, lithium secondary batteries can be manufactured as small and light, and have many advantages in terms of energy density, discharge voltage and output power stability, and t...
Claims
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IPC IPC(8): H01M10/0567H01M10/42H01M10/054C07F19/00C07F7/10
CPCH01M10/054H01M10/0567C07F7/10Y02E60/10H01M10/4235H01M2300/0025C07F9/1415C07F19/00
Inventor 朴昶勋李镐春姜成振张民哲金度延金炫志
Owner LG ENERGY SOLUTION LTD