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High-voltage electrolyte, high-voltage non-aqueous electrolyte and its lithium-ion battery

A non-aqueous electrolyte and lithium-ion battery technology, which is applied in the direction of non-aqueous electrolyte batteries, non-aqueous electrolytes, lithium batteries, etc., can solve the problems of high-voltage additive materials, such as the difficulty of high-voltage additive materials, and achieve oxidation inhibition, high process maturity, and preparation simple effect

Active Publication Date: 2016-08-03
HONOR DEVICE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, this prior art has the following deficiencies: sulfones, nitriles, and ionic liquid solvents all have application drawbacks as lithium-ion battery electrolyte compatibilizers
However, the difficulty of this technology is that it is not easy to find suitable high-voltage additive materials

Method used

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  • High-voltage electrolyte, high-voltage non-aqueous electrolyte and its lithium-ion battery
  • High-voltage electrolyte, high-voltage non-aqueous electrolyte and its lithium-ion battery
  • High-voltage electrolyte, high-voltage non-aqueous electrolyte and its lithium-ion battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] The test cells were assembled according to the conventional cell preparation method. Take LiNi 0.5 mn1.5 o 4 is the positive electrode, metal lithium is the negative electrode, the positive and negative electrode current collectors are aluminum foil and copper foil respectively, and the electrolyte composition is EC / EMC (30:70) 1mol / L LiPF 6 Solution, the high-voltage additive is the substance prepared by the following process, and its mass percentage is 0.6%. The battery is charged and discharged at a rate of 0.2C within the voltage range of 3-4.9V.

[0038]

Embodiment 2

[0040] A battery was prepared and tested in the same manner as in Example 1, except that the high-voltage additive was a substance with the following structure, and its mass percentage was 0.6%.

[0041]

Embodiment 3

[0043] The same method as in Example 1 was used to prepare and test the battery, except that the high-voltage additive was a mixture of high-voltage additives selected in Example 1 and Example 2, with a mass ratio of 1:1 and a total mass percentage of 0.6%. .

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Abstract

Provided is a high voltage non-aqueous electrolyte, comprising a solute, a solvent, and a high voltage additive; the high voltage additive is represented by the structure X—(R—Z) n—R—Y, wherein X and Y are one or more of the following structures: see formula (I); Z is one or more of the following structures: see formula (II); R is one or more of C1-C10 alkyl, alkenyl, alkynyl, oxyalkyl, oxyalkenyl, oxyalkynyl and halogenated compounds thereof; n is 0-10; and R1 and R2 are halogen, hydrogen, alkyl, oxyalkyl, or halogen substituted alkyl or oxyalkyl. The high voltage non-aqueous electrolyte can be applied under the voltage above 4.5 V. Also provided is a lithium ion battery comprising the high voltage non-aqueous electrolyte.

Description

technical field [0001] The invention relates to a high-voltage electrolytic solution containing a high-voltage additive, a high-voltage non-aqueous electrolytic solution and a lithium ion battery composed of the same. Background technique [0002] Compared with other batteries, lithium-ion batteries have the advantages of light weight, small size, high working voltage, high energy density, high output power, high charging efficiency, no memory effect, long cycle life, etc., not only in mobile phones, notebook computers and other fields It has been widely used, and is also considered to be one of the best choices for electric vehicles and large energy storage devices. However, at present, electronic digital products such as smart phones and tablet computers have higher and higher requirements on the energy density of batteries, making it difficult for commercial lithium-ion batteries to meet the requirements. Using high-capacity cathode materials or high-voltage cathode mate...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/0566H01M10/0567H01M10/0525
CPCH01M10/0525H01M10/0566H01M10/0567H01M2300/0025H01M10/052Y02E60/10
Inventor 杨同勇
Owner HONOR DEVICE CO LTD