Electrolyte and applied electrochemical device

An electrolyte and chemical formula technology, applied in electrochemical generators, organic electrolytes, non-aqueous electrolytes, etc., can solve the problems of reduced battery life, easy oxidation and decomposition of electrolytes, and achieve the effect of increasing high voltage

Pending Publication Date: 2021-07-16
SHENZHEN YANYI NEW MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, the electrolyte is easily oxidized and decomposed under high voltage conditions, thereby reducing the service life of the battery

Method used

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  • Electrolyte and applied electrochemical device
  • Electrolyte and applied electrochemical device
  • Electrolyte and applied electrochemical device

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0056] 1. Preparation of lithium ion battery

[0057] The positive electrode active material lithium cobalt oxide (LiCoO 2 ), the conductive agent Super P, and polyvinylidene fluoride are mixed according to the weight ratio of 96:2:2, N-methylpyrrolidone (NMP) is added, and stirred evenly under the action of a vacuum mixer to obtain the positive electrode slurry, wherein the positive electrode slurry The solid content is 72wt%. The positive electrode slurry is evenly coated on the aluminum foil of the positive electrode current collector, and the aluminum foil coated with the positive electrode material is dried at 90°C, and then the positive electrode sheet is obtained after cold pressing, cutting into pieces, and slitting. The positive electrode sheet is a conventional positive electrode sheet.

[0058] Negative electrode active material graphite, conductive additive Super P, sodium carboxymethylcellulose (CMC), and binder styrene-butadiene rubber (SBR) were mixed accordin...

specific Embodiment

[0071] Fluorine-containing cyclic (sulfite) sulfuric acid (sulfonic acid) ester compounds in Table 1 are selected from (1). 2-fluoro-1,3-propanesultone, (2). Compound 4, (3). Compound 6; Nitriles The compound is selected from: (1). Hexanetrinitrile, (2). Adiponitrile, (3). Ethylene glycol bispropionitrile ether. Specific examples are as follows:

[0072] Table 1

[0073]

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PUM

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Abstract

The invention discloses an electrolyte and an applied electrochemical device, which relate to a lithium ion battery and an electrolyte thereof. The electrolyte contains at least one of a fluorinated cyclic sulfate, a fluorinated cyclic sulfite, a fluorinated cyclic sulfonate, and a fluorinated cyclic sulfone. The electrochemical device comprises a positive plate containing a positive active material, a negative plate containing a negative active material, an isolating membrane and the electrolyte, and the electrolyte is the above electrolyte. High voltage, high magnification, high-temperature cycling stability and high-temperature storage and floating charge performance of the electrochemical device can be improved at the same time.

Description

technical field [0001] The invention relates to the field of lithium ion batteries, in particular to lithium ion batteries and electrolytes therein. Background technique [0002] With the continuous improvement of living standards, energy storage devices have become an indispensable part of modern mobile electronic products, especially lithium-ion batteries, which are more and more widely used in mobile devices such as mobile phones, computers, drones, and electric vehicles. field. At present, reducing the volume of batteries and increasing their energy density is an important direction for the development of lithium-ion batteries. Increasing the charging voltage is an important means to increase the energy density. However, at present, the electrolyte is easily oxidized and decomposed under high voltage conditions, thereby reducing the service life of the battery. In addition, the energy storage device will generate heat during the charging and discharging process, resul...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0566H01M10/0567H01M10/0568
CPCH01M10/0566H01M10/0567H01M10/0568H01M2300/0025Y02E60/10
Inventor 薄祥昆赵光振
Owner SHENZHEN YANYI NEW MATERIALS CO LTD
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