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Electrolyte additive, electrolyte and energy storage device

An electrolyte additive and electrolyte technology, applied in the field of energy storage, to achieve the effects of reducing expansion, increasing energy density, and prolonging cycle life

Pending Publication Date: 2022-04-08
惠州锂威新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the cycle life and expansion rate of lithium-ion batteries provided by this method need to be further improved.

Method used

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  • Electrolyte additive, electrolyte and energy storage device
  • Electrolyte additive, electrolyte and energy storage device
  • Electrolyte additive, electrolyte and energy storage device

Examples

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Embodiment Construction

[0038] The electrolyte additive, electrolyte and energy storage device of the present invention will be further described in detail below in conjunction with specific examples. The present invention can be embodied in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0039] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field of the invention. The terms used herein in the description of the present invention are for the purpose of describing specific embodiments only, and are not intended to limit the present invention.

[0040] The optional range of the term "and / or" used herein includes any one of two or more of the relevant listed items, and also includes any and all comb...

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PUM

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Abstract

The invention relates to an electrolyte additive. The electrolyte additive comprises a silicon-containing compound and a fluorine-containing compound, the silicon-containing compound is selected from one or more of compounds with structural characteristics as shown in the following formula (I); the fluorine-containing compound is selected from one or more of fluoroethylene carbonate, fluorocarboxylate with the carbon atom number of 2-7 and fluoroether with the carbon atom number of 2-7. The electrolyte additive can effectively prolong the cycle life of an energy storage device and improve the high-temperature storage performance of the energy storage device.

Description

technical field [0001] The invention relates to the technical field of energy storage, in particular to an electrolyte additive, electrolyte and an energy storage device. Background technique [0002] Energy storage devices, such as lithium-ion batteries, have the characteristics of environmental friendliness, high working voltage, large specific capacity, long cycle life and low self-discharge rate, and have been widely used in smart wearables, computers, smartphones, cameras, drones, etc. and electric vehicles. In order to meet people's needs, it is urgent to develop energy storage devices with higher energy density. This requires the positive and negative electrode materials of energy storage devices to have higher specific capacity and higher voltage platform, and at the same time, it is necessary to extend the life of energy storage devices and reduce their expansion in cycles. However, directly increasing the voltage platform of the positive electrode or using anode ...

Claims

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Application Information

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IPC IPC(8): H01M10/0567H01M10/0525H01M10/42H01M10/058
CPCY02P70/50
Inventor 孙结岩李涛马斌陈杰
Owner 惠州锂威新能源科技有限公司
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