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Electrolyte solution and electrochemical device and electronic device using same

An electrolyte and ion technology, applied in the field of energy storage, can solve the problems of unstable negative electrode, high viscosity of flame retardant, deterioration of lithium-ion battery kinetic performance and storage performance, etc.

Active Publication Date: 2021-12-10
NINGDE AMPEREX TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] When safety is improved by adding flame retardants to the electrolyte, the kinetic performance and storage performance of lithium-ion batteries will deteriorate due to the high viscosity of the flame retardants and their instability to the negative electrode

Method used

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  • Electrolyte solution and electrochemical device and electronic device using same
  • Electrolyte solution and electrochemical device and electronic device using same
  • Electrolyte solution and electrochemical device and electronic device using same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0202] The performance evaluation of the examples and comparative examples of the lithium-ion battery according to the present application will be described below.

[0203] 1. Preparation of lithium ion battery

[0204] 1. Preparation of negative electrode

[0205] Graphite, styrene-butadiene rubber (SBR) and sodium methylcellulose (CMC) are fully stirred and mixed in an appropriate amount of deionized water according to a weight ratio of 97:1:2, so that it forms a uniform negative electrode slurry, wherein the negative electrode slurry The solids content was 54% by weight. The slurry was coated on the negative electrode current collector (copper foil), dried at 85°C, then cold-pressed, cut into pieces, cut, and then dried under vacuum at 120°C for 12 hours to obtain the negative electrode.

[0206] 2. Preparation of positive electrode

[0207] The positive electrode active material lithium cobaltate (LiCoO 2 ), the conductive agent Super P and the binder polyvinylidene fl...

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Abstract

The present application relates to an electrolytic solution and electrochemical devices and electronic devices using the same. Specifically, the present application provides an electrolyte solution, which includes an ionic liquid, and the ionic liquid includes at least two ionic liquid components. The electrolyte containing the combination of specific ionic liquid components of the present application helps to improve the kinetic performance, storage performance and safety performance of electrochemical devices.

Description

technical field [0001] The present application relates to the field of energy storage, in particular to an electrolyte and an electrochemical device and an electronic device using the same. Background technique [0002] Electrochemical devices (e.g., lithium-ion batteries) are widely used in wearable devices, smartphones, drones, and even electric vehicles due to their environmental friendliness, high operating voltage, large specific capacity, and long cycle life. The new green chemical power source with the most development potential in the world today. High-frequency and high-power operating conditions make people put forward higher requirements for the safety performance (thermal abuse, mechanical abuse, etc.) and service life of lithium-ion batteries. [0003] When the safety is improved by adding flame retardants to the electrolyte, the kinetic performance and storage performance of lithium-ion batteries will be deteriorated due to the high viscosity of the flame reta...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/0566H01M10/0525
CPCH01M10/0525H01M10/0566H01M2300/0025Y02E60/10
Inventor 管明明刘建禹熊亚丽郑建明
Owner NINGDE AMPEREX TECH