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Electrolyte and electrochemical device and electronic device using same

An electrochemical and electrolyte technology, applied in the field of energy storage, can solve problems such as deteriorating the internal impedance of the battery

Active Publication Date: 2021-06-29
NINGDE AMPEREX TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, low porosity usually deteriorates the internal impedance of the battery, especially the cathode impedance

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0137] The performance evaluation of the examples and comparative examples of the lithium-ion battery according to the present application will be described below.

[0138] 1. Preparation of lithium ion battery

[0139] 1. Preparation of positive electrode

[0140] Lithium cobaltate LCO (LiCO 2 ), conductive agent (Super Conductive carbon) and polyvinylidene fluoride (PVDF) were dissolved in N-methylpyrrolidone (NMP) solvent system at a weight ratio of 97:1.4:1.6, and stirred under the action of a vacuum mixer until the system became uniform and transparent, and prepared Positive slurry. The positive electrode slurry is uniformly coated on the aluminum foil of the positive electrode current collector, and the aluminum foil is dried at 85°C, then compacted by a roller press, cut into pieces, and cut, and then dried for 4 hours under a vacuum condition of 85°C to obtain positive electrode.

[0141] 2. Preparation of negative electrode

[0142] Artificial graphite, conduct...

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Abstract

The present application relates to an electrolytic solution and electrochemical devices and electronic devices using the same. Specifically, the application provides an electrolyte solution, which includes one or more compounds of formula (I): wherein: R 1 selected from fluorine atoms, C containing one or more fluorine atoms 1 -C 10 Alkyl or C containing one or more fluorine atoms 6 -C 16 Aryl; R 2 selected from substituted or unsubstituted C 1 -C 10 Alkylene, substituted or unsubstituted C 6 -C 16 Arylene; R 3 selected from hydrogen atom, fluorine atom, ‑O‑R 0 , substituted or unsubstituted C 1 -C 10 Alkyl, substituted or unsubstituted C 6 -C 16 Aryl, where R 0 is substituted or unsubstituted C 1 -C 10 alkyl; and when substituted, the substituent is selected from fluorine atoms. The electrolyte solution of the present application can improve the low-temperature discharge performance, high-temperature storage performance, float charge and overcharge performance of the high energy density secondary battery, and reduce the DC resistance of the secondary battery.

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 it. Background technique [0002] Electrochemical devices (e.g., lithium-ion batteries) have been widely used due to their environmental friendliness, high operating voltage, large specific capacity, and long cycle life, and have become the most promising new green chemical power sources in the world today. Soft-pack batteries with small packaging thickness and light weight are favored by people. With the rapid development of automotive technology and consumer electronics technology, high-frequency and high-power operating conditions have made people put forward higher requirements for the energy density of lithium-ion batteries. At present, the improvement of energy density is often achieved by increasing the compaction of the positive and negative electrodes. However, low porosity usually deter...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/0566H01M10/0567H01M10/0525
CPCH01M10/0525H01M10/0566H01M10/0567H01M2300/0025Y02E60/10
Inventor 管明明栗文强郑建明
Owner NINGDE AMPEREX TECH