Electrolyte, electrochemical device and electronic device

An electrochemical and electrolyte technology, applied in the field of electronics, can solve problems such as less obvious effects, and achieve the effects of inhibiting deposition, reducing oxidation consumption, and improving high-temperature storage performance

Active Publication Date: 2022-04-01
NINGDE AMPEREX TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the current technology for improving electrochemical devices can improve the high-temperature storage performance and electrochemical impedance of electrochemical devices to a certain extent, the effect is not obvious, and further improvements are expected

Method used

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  • Electrolyte, electrochemical device and electronic device
  • Electrolyte, electrochemical device and electronic device
  • Electrolyte, electrochemical device and electronic device

Examples

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Effect test

Embodiment 1

[0057] Preparation of positive electrode: Dissolve positive electrode active material lithium cobaltate, conductive agent acetylene black, and binder polyvinylidene fluoride in N-methylpyrrolidone (NMP) solution at a weight ratio of 96:2:2 to form positive electrode slurry material. Aluminum foil is used as the positive electrode current collector, the positive electrode slurry is coated on the positive electrode current collector, and the positive electrode is obtained after drying, cold pressing, and cutting. The compacted density of the positive electrode is 4.15g / cm 3 .

[0058] Preparation of negative electrode: Negative electrode active material graphite, binder styrene-butadiene rubber (SBR), thickener sodium carboxymethyl cellulose (CMC), conductive agent conductive carbon black in a weight ratio of 85:2:2:11 Dissolve in deionized water to form negative electrode slurry. Copper foil with a thickness of 10 μm is used as the negative electrode current collector, and t...

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Abstract

The present application provides electrolyte solutions, electrochemical devices and electronic devices. The electrolytic solution includes a boron-containing lithium salt compound and a polynitrile compound, wherein the boron-containing lithium salt compound includes at least one of a compound of formula I or a compound of formula II: wherein, R 1 and R 4 each independently selected from C 1 -C 10 Alkylene, C 1 -C 10 Haloalkylene, C 4 -C 20 Aryl or haloaryl; R 2 , R 3 , R 5 , R 6 each independently selected from H, halogen, C 1 -C 10 Alkyl or C 1 -C 10 Haloalkyl. The electrolyte of the present application includes a boron-containing lithium salt compound and a polynitrile compound. The boron-containing lithium salt compound and the polynitrile compound have a synergistic effect and can improve the high-temperature storage performance of the electrochemical device while reducing the impedance of the electrochemical device.

Description

technical field [0001] The present application relates to the field of electronic technology, in particular to an electrolyte, an electrochemical device and an electronic device. Background technique [0002] With the development and progress of electrochemical devices (eg, lithium-ion batteries), higher and higher requirements are placed on their high-temperature storage performance and electrochemical impedance. Although the current technology for improving electrochemical devices can improve the high-temperature storage performance and electrochemical impedance of electrochemical devices to a certain extent, the effect is not obvious, and further improvements are expected. Contents of the invention [0003] Embodiments of the present application provide an electrolyte, which includes a boron-containing lithium salt compound and a polynitrile compound, wherein the boron-containing lithium salt compound includes at least one of the compounds of formula I or formula II: ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/0567H01M10/0525H01M10/42
CPCY02E60/10
Inventor 袁晓熊亚丽彭谢学唐超
Owner NINGDE AMPEREX TECH
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