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Electrolyte and electrochemical device and electronic device containing electrolyte

An electrolyte and atom technology, applied in the field of electrochemistry, can solve the problems of accelerating the decomposition of electrolyte, affecting the service life and cycle performance of lithium-ion batteries, etc., to suppress continuous decomposition, improve high-temperature storage performance and cycle performance, and achieve good high-temperature storage. Effects of performance and cycle performance

Pending Publication Date: 2022-08-02
NINGDE AMPEREX TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, while increasing the energy density of lithium-ion batteries, it often accelerates the decomposition of electrolyte, which affects the service life and cycle performance of lithium-ion batteries.

Method used

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  • Electrolyte and electrochemical device and electronic device containing electrolyte
  • Electrolyte and electrochemical device and electronic device containing electrolyte
  • Electrolyte and electrochemical device and electronic device containing electrolyte

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0114]

[0115] Ethylene carbonate (EC), propylene carbonate (PC), diethyl carbonate (DEC), ethyl propionate (EP), propyl propionate (PP) were mixed in an argon atmosphere glove box with a water content of less than 10 ppm. ), mixed uniformly according to the mass ratio of 1:1:1:1:1 to form the base solvent. Then add the compound formula (I-1) represented by the formula (I), the compound formula (II-1) represented by the formula (II) and the fully dried lithium salt LiPF to the above-mentioned base solvent. 6 , and stir evenly to dissolve the lithium salt. Based on the total mass of the electrolyte, the mass percentage of formula (I-1) is 0.1%, the mass percentage of (II-1) is 0.001%, and the lithium salt LiPF 6 The mass percentage of 12.5%, and the remainder is the mass percentage of the base solvent.

[0116]

[0117] The cathode material lithium cobalt oxide (LiCoO 2 ), conductive agent conductive carbon black, conductive paste, and binder polyvinylidene fluoride (PV...

Embodiment 2 to Embodiment 17

[0125] The preparation steps of , , , and are the same as those in Example 1, and the relevant preparation parameters and The changes in performance parameters are shown in Table 1.

Embodiment 18 to Embodiment 47

[0127]

[0128] In addition to adding the compound represented by formula (I) and the compound represented by formula (II) to the base solvent, at least one of sulfur-oxygen double bond compounds, polynitrile compounds or boron-based lithium salt compounds is also added. The changes of parameters and performance parameters are shown in Table 2, and the rest are the same as in Example 1.

[0129] The preparation steps of , , and are the same as those in Example 1.

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Abstract

The invention relates to an electrolyte and an electrochemical device and an electronic device comprising the electrolyte, and the electrolyte comprises cyano compounds represented by a formula (I) and a formula (II).

Description

technical field [0001] The present application relates to the technical field of electrochemistry, and in particular, to an electrolyte, an electrochemical device and an electronic device containing the electrolyte. Background technique [0002] Lithium-ion batteries have the advantages of high energy storage density, high open circuit voltage, low self-discharge rate, long cycle life, and good safety. product. [0003] With the continuous expansion of the use of lithium-ion batteries, the market has put forward higher requirements for lithium-ion batteries, such as requiring lithium-ion batteries to have longer life and better cycle performance while having high energy density. However, while improving the energy density of lithium-ion batteries, the decomposition of the electrolyte is often accelerated, thereby affecting the service life and cycle performance of lithium-ion batteries. Therefore, in view of this, developing a suitable electrolyte has become a technical pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0566H01M10/0525
CPCH01M10/0566H01M10/0525H01M2300/0025Y02E60/10
Inventor 彭谢学唐超
Owner NINGDE AMPEREX TECH
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