Electrolyte and electrochemical device

An electrolyte and compound technology, applied in electrochemical generators, electrolytes, organic electrolytes, etc., can solve the problems of cycle performance and storage performance to be improved, achieve improved electrochemical performance, reduce storage gas production, and good film forming effect Effect

Active Publication Date: 2021-01-15
CONTEMPORARY AMPEREX TECH CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0118] (2) Preparation of the compound shown in formula I-2:

[0119] The reaction equation is:

[0120]

[0121] The specific preparation process is:

[0122] Mix anhydrous sodium carbonate, raw material P-4 and raw material P-3 in absolute ethanol, react and stir for 2h to 5h; wash with hot ethanol several times to obtain the crude product, and recrystallize to obtain the compound shown in formula I-2.

[0123] (3) Preparation of the compound shown in formula I-3:

[0124] The reaction equation is:

[0125]

[0126] The specific preparation process is:

[0127] Mix anhydrous sodium carbonate, raw materials P-5 and raw materials P-3 in absolute ethanol, react and stir for 2h to 5h; wash with hot ethanol several times to obtain a crude product, and recrystallize to obtain the compound shown in formula I-3.

[0128] The electrochemical device according to the second aspect of the present application will be described below.

[0129] The electrochemical device accordi...

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Abstract

This application provides an electrolyte and an electrochemical device, in which the electrolyte comprises an additive A and an additive B, wherein the additive A is present in an amount of 0.01% to 10% by mass in the electrolyte and the additive B is present in an amount of 0.1% to 10% by mass in the electrolyte and the electrolyte has a conductivity of 6mS / cm to 10mS / cm at 25°C. The present invention can improve the cycle performance and storage performance of the electrochemical device, in particular, improve the cycle performance and storage performance of the electrochemical device under high temperature and high voltage conditions while keeping the low temperature performance.

Description

technical field [0001] The present application relates to the field of energy storage materials, in particular, to an electrolyte and an electrochemical device. Background technique [0002] Lithium-ion secondary batteries are widely used in electric vehicles and consumer electronics products 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 secondary batteries is: high voltage, high power, long cycle life, long storage life and excellent safety performance. [0003] Lithium-ion secondary batteries currently widely use an electrolyte system in which lithium hexafluorophosphate is used as a conductive lithium salt and cyclic carbonate and / or chain carbonate is used as an organic 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 sto...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/0567H01M10/0525H01M10/42
CPCH01M10/0525H01M10/0567H01M10/4235H01M2300/0025H01M10/0569H01M2300/004Y02E60/10H01G11/60H01G11/64
Inventor 蒋耀胡春华伊天成苗露梁成都
Owner CONTEMPORARY AMPEREX TECH CO
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