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Electrolyte, electrochemical device, and electronic device

An electrolyte and compound technology, applied in the field of electrochemistry, can solve problems such as degradation of cycle performance and storage performance, oxidation of electrolyte, and structural damage of positive and negative electrodes

Pending Publication Date: 2020-12-15
NINGDE AMPEREX TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

When the electrochemical device is stored and cycled at a high voltage of 4.4V and above, it is easy to damage the structure of the positive and negative electrodes and oxidize the electrolyte, resulting in degradation of cycle performance and storage performance

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

Experimental program
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Effect test

preparation example Construction

[0105] (4) Preparation of separator

[0106] Boehmite was mixed with polyacrylate and dissolved in deionized water to form a coating slurry. Subsequently, the coating slurry is evenly coated on both surfaces of the porous substrate by a dimple coating method, and dried to obtain the required isolation film.

[0107] (5) Preparation of lithium ion battery

[0108] Stack the positive electrode, separator, and negative electrode in order, so that the separator is between the positive and negative electrodes to play the role of isolation, and then wind up to obtain the bare cell; after welding the tabs, place the bare cell in the outer packaging foil aluminum In the plastic film, the above-mentioned prepared electrolyte is injected into the dried bare cell, and the lithium-ion battery is obtained through processes such as vacuum packaging, standing, formation, shaping, and capacity testing.

[0109] Prepared electrolyte and lithium-ion battery are tested according to the followi...

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Abstract

The embodiment of the invention provides an electrolyte, an electrochemical device and an electronic device, and in some embodiments, the electrolyte comprises at least one of compounds shown in a formula I: formula I, wherein R is selected from one of a hydrogen group, a fluorine group, an alkyl group, an alkenyl group, an alkynyl group, an aryl group, a substituted alkyl group, a substituted alkenyl group, a substituted alkynyl group or a substituted aryl group. The electrolyte provided by the invention can effectively improve the cycle performance and high-temperature storage performance ofan electrochemical device adopting the electrolyte under high voltage.

Description

technical field [0001] The present application relates to the field of electrochemical technology, in particular to an electrolyte, an electrochemical device and an electronic device. Background technique [0002] Electrolyte is an important part of electrochemical devices (such as lithium-ion batteries). The electrolyte plays the role of transporting charges between the positive and negative electrodes of the battery. Performance, operating temperature range, and safety performance have a greater impact. [0003] With the improvement of the requirements for electrochemical devices, the development of electrochemical devices with high energy density is gradually promoted, and the upper limit voltage of electrochemical device design is also increased. At present, the rated voltage of lithium cobalt oxide system electrochemical devices can reach 4.45V-4.5V. When the electrochemical device is stored and cycled at a high voltage of 4.4V and above, it is easy to damage the stru...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0565H01M10/0525H01M10/42
CPCH01M10/0525H01M10/0565H01M10/4235H01M2300/0085Y02E60/10
Inventor 王翔栗文强刘建郑建明
Owner NINGDE AMPEREX TECH
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