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Electrolyte, electrochemical device, and electronic device

An electrolyte and compound technology, applied in the field of electrochemical devices and electronic devices, can solve problems affecting the cycle performance and high-temperature storage of electrochemical devices, and achieve the effect of improving cycle stability and high-temperature storage performance and improving performance

Pending Publication Date: 2022-03-29
NINGDE AMPEREX TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Improving the operating voltage of electrochemical devices such as batteries is an effective way to increase their energy density. However, with the increase of operating voltage, the cycle performance and high-temperature storage performance of electrochemical devices are usually affected.

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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preparation example Construction

[0067] The positive electrode of the present invention can be prepared by a preparation method known in the art. In some embodiments, a positive electrode active material layer can be formed on a positive electrode current collector by using raw materials including lithium transition metal compound powder and a binder. For example, raw materials such as the positive electrode active material (such as the above-mentioned lithium transition metal compound powder) and the binder can be dry-mixed to form a sheet, and the obtained sheet is pressed on the positive electrode current collector to obtain a positive electrode. Alternatively, the above-mentioned raw materials can be dissolved or dispersed in a liquid medium (solvent) to form a slurry, and the formed slurry can be coated on the positive electrode current collector and dried to obtain a positive electrode; wherein, it can also be used as required Materials such as conductive materials and thickeners.

[0068] For example, ...

Embodiment

[0086] (1) Preparation of electrolyte

[0087] In an argon atmosphere glove box with a water content of 6 Dissolving in the above-mentioned mixed solvent to obtain a basic electrolyte; adding additives to the basic electrolyte to obtain an electrolyte; wherein, the additive is one or more of the salt compound shown in formula 1, the polycyano compound and the first compound , the types and contents of additives in each embodiment and comparative examples are shown in Table 1, Table 2 and Table 3, and the contents are calculated based on the total weight of the electrolyte;

[0088] (2) Preparation of battery

[0089] A separator is used to separate the positive electrode and the negative electrode, and the bare cell is formed by winding. The bare cell is placed in the outer package and injected with the above electrolyte, and then undergoes formation, aging and other processes to make a lithium-ion battery;

[0090] Among them, the positive electrode includes a positive elect...

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Abstract

An electrolyte, an electrochemical device and an electronic device, the electrolyte comprising a salt compound represented by the following formula 1: wherein X is S or O; r1, R2, R3 and R4 are respectively and independently selected from hydrogen, halogen, nitryl, sulfenyl, sulfonyl, aldehyde group, substituted or unsubstituted C1-C10 alkyl, substituted or unsubstituted C3-C10 cycloalkyl, substituted or unsubstituted C2-C10 alkenyl, substituted or unsubstituted C2-C10 alkynyl, substituted or unsubstituted C1-C10 alkoxy and substituted or unsubstituted C6-C10 aryl, in the formula, R1, R2, R3 and R4 are independently selected from hydrogen, halogen, nitryl, sulfenyl, sulfonyl, aldehyde, substituted or unsubstituted C1-C10 alkyl, substituted or unsubstituted C3-C10 cycloalkyl, substituted or unsubstituted C2-C10 alkenyl, substituted or unsubstituted C6-C10 alkynyl, substituted or unsubstituted C6-C10 alkynyl, substituted or unsubstituted C6-C10 alkynyl, substituted or unsubstituted the substituent group is one of substituted or unsubstituted C3-C10 heteroaryl groups or is formed by bonding more than two groups of the substituted or unsubstituted C3-C10 heteroaryl groups; at least one of R1, R2, R3 and R4 is selected from a sulfonate anion substituent group or a borate anion substituent group; m is selected from metal elements in the IA family, the IIA family, the IIIA family, the IB family and the IIB family in the periodic table of elements. The performance such as cycling stability and high-temperature storage performance of the electrochemical device can be improved.

Description

technical field [0001] The invention belongs to the field of electrochemical devices, and in particular relates to an electrolytic solution and an electrochemical device and an electronic device using the electrolytic solution. Background technique [0002] Improving the operating voltage of electrochemical devices such as batteries is an effective way to increase their energy density. However, with the increase of operating voltage, the cycle performance and high-temperature storage performance of electrochemical devices are usually affected. Therefore, how to improve the cycle stability and high-temperature storage performance of electrochemical devices such as batteries under high voltage is a technical problem that needs to be solved. Contents of the invention [0003] The invention provides an electrolytic solution, which can effectively improve performances such as cycle stability and high-temperature storage performance of electrochemical devices such as batteries u...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0567H01M10/052H01M10/0525
CPCH01M10/0567H01M10/052H01M10/0525H01M2300/0025
Inventor 吴大贝邱亚明崔辉唐超
Owner NINGDE AMPEREX TECH
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