Lithium-ion battery and its electrolyte

A technology of lithium ion battery and electrolyte, applied in the field of lithium ion battery and its electrolyte, can solve the problems of large impedance of protective film and affecting battery performance, etc.

Active Publication Date: 2018-05-29
CONTEMPORARY AMPEREX TECH CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the protective film formed by the existing additives has a large impedance, which often affects the performance of the battery, such as capacity, cycle, etc.

Method used

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  • Lithium-ion battery and its electrolyte
  • Lithium-ion battery and its electrolyte
  • Lithium-ion battery and its electrolyte

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Electrolyte and lithium ion battery are prepared according to the same method as Comparative Example 1, the difference is that 0.05% mass ratio of N-propynyl o-benzoylsulfonimide is added to the solvent of the electrolytic solution, and its structural formula is as follows :

[0044]

Embodiment 2

[0046] The electrolyte and the lithium ion battery were prepared in the same manner as in Comparative Example 1, except that 0.1% by mass of N-propynyl-phthalimide was added to the solvent of the electrolyte.

Embodiment 3

[0048] The electrolyte and the lithium ion battery were prepared in the same manner as in Comparative Example 1, except that 0.5% by mass of N-propynyl-phthalimide was added to the solvent of the electrolyte.

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PUM

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Abstract

The present invention discloses a lithium ion battery and an electrolyte thereof, wherein the electrolyte comprises a non-aqueous solvent and a lithium salt dissolved in the non-aqueous solvent, the non-aqueous solvent contains a N-substituted saccharin compound, the structural formula of the compound is represented by a formula I, R1 is selected from alkyl, unsaturated alkyl, aryl, acyl and sulfonyl, and R2, R3, R4 and R5 are respectively and independently any one selected from hydrogen, fluorine, chlorine, bromine and iodine. Compared with the lithium ion battery electrolyte in the prior art, the lithium ion battery electrolyte of the present invention contains the N-substituted saccharin compound so as to improve the high temperature storage performance of the battery while improve the first time capacity. The formula I is defined in the specification.

Description

technical field [0001] The invention belongs to the field of lithium ion batteries, and more specifically, the invention relates to a lithium ion battery and an electrolyte thereof. Background technique [0002] With the popularization of consumer electronics products such as notebook computers, mobile phones, handheld game consoles, tablet computers, etc., everyone's requirements for their batteries are becoming more and more stringent. For example, the batteries are required to be small and light, and must have high capacity, long cycle life and stable performance. Among secondary batteries, lithium-ion batteries have higher energy density than other types of batteries, and this advantage also makes them occupy a mainstream position in the market. [0003] In recent years, non-aqueous solvent lithium-ion batteries are also facing a rather severe test, because when people increase the energy density of the battery (such as increasing the battery voltage) in order to meet p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/0569
CPCY02E60/10
Inventor 叶士特付成华王小梅褚春波
Owner CONTEMPORARY AMPEREX TECH CO
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