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Electrolyte and battery

An electrolyte and electrolyte salt technology, applied in secondary batteries, circuits, electrical components, etc., can solve the problems of cycle performance and storage performance to be improved, reduce the dissolution of transition metal ions, improve cycle performance and storage performance, reduce the effect of destruction

Active Publication Date: 2021-02-23
CONTEMPORARY AMPEREX TECH CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are still many deficiencies in the above-mentioned electrolyte system. For example, under high voltage and high temperature conditions, the cycle performance and storage performance of the above-mentioned electrolyte system need to be improved.

Method used

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  • Electrolyte and battery
  • Electrolyte and battery
  • Electrolyte and battery

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0210] (1) Preparation of the compound shown in formula I-1

[0211] The reaction equation is:

[0212]

[0213]

[0214] The specific preparation process is:

[0215] Add P-2 aqueous solution with a concentration of 30% to 40% to the raw material P-1 within 20min to 60min and stir rapidly. After the dropwise addition, stir rapidly for 15h to 30h, then reflux and stir in an oil bath at 70°C to 90°C for 3h to 5h, obtain colorless fuming viscous liquid intermediate product I-1-1; continue to add K 2 CO 3 , KI, anhydrous acetonitrile, stir quickly to form a solid-liquid mixed phase, quickly add raw material P-3 at 40°C ~ 60°C, continue stirring for 10h ~ 20h, cool to room temperature, separate and purify to obtain the compound shown in formula I-1 .

[0216] (2) Preparation of the compound shown in formula I-2

[0217] The reaction equation is:

[0218]

[0219] The specific preparation process is:

[0220]Mix anhydrous sodium carbonate, raw material P-4 and raw m...

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Abstract

The application provides an electrolyte solution and a battery. The electrolytic solution contains an organic solvent and an electrolyte salt, and the electrolytic solution also contains additives A, B and C, the additive A is a polynitrile-based six-membered nitrogen heterocyclic compound with a low oxidation potential, and the additive B is an oxidation potential Higher aliphatic dinitrile or polynitrile compounds, additive C is dinitrile or polynitrile compounds with ether linkages. The electrolyte solution of the present application can improve the cycle performance and storage performance of the battery, especially improve the cycle performance and storage performance of the battery under high temperature and high voltage conditions.

Description

technical field [0001] This application relates to the field of energy storage materials, in particular, to an electrolyte and a battery. Background technique [0002] Lithium-ion batteries are widely used in electric vehicles and consumer electronics due to their advantages such as high energy density, high output power, long cycle life and low environmental pollution. The current demand for lithium-ion batteries is: high voltage, high power, long cycle life, long storage life and excellent safety performance. [0003] Lithium-ion batteries are currently widely used in an electrolyte system using lithium hexafluorophosphate as a conductive lithium salt and cyclic carbonate and / or chain carbonate as a solvent. However, there are still many deficiencies in the above-mentioned electrolyte system, for example, under the condition of high voltage and high temperature, the cycle performance and storage performance of the above-mentioned electrolyte system need to be improved. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/0567H01M10/0525
CPCH01M10/0525H01M10/0567Y02E60/10
Inventor 伊天成胡春华蒋耀钭舒适梁成都
Owner CONTEMPORARY AMPEREX TECH CO