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

A non-aqueous electrolyte, lithium-ion battery technology, used in secondary batteries, circuits, electrical components, etc., to achieve high process maturity, simple preparation, and the effect of inhibiting oxidation

Active Publication Date: 2016-10-05
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 disadvantages: sulfones, nitriles, and ionic liquids are used as electrolyte solvents for lithium-ion batteries, all of which have application drawbacks
The difficulty of this technique lies in finding suitable additive molecules

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

[0033] The test cells were assembled according to the conventional cell preparation method. Take LiNi 0.5 mn 1.5 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 tri(isopropyl)arsenate, and its mass percentage is 1%. The battery is charged and discharged at a rate of 0.2C within the voltage range of 3-4.9V.

Embodiment 2

[0035] The same method as in Example 1 was used to prepare and test the battery, except that the high-voltage additive was tris(1,1,1,3,3,3-hexafluoroisopropyl) arsenate, and its mass percentage was 1 %.

Embodiment 3

[0037] The battery was prepared and tested in the same manner as in Example 1, except that the high-voltage additives were tris(1,1,1,3,3,3-hexafluoroisopropyl) arsenate and tris(isopropyl ) a mixture of arsenate, the mass ratio is 1:1, and the total mass percentage is 1%.

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Abstract

The invention provides a high-voltage electrolyte and a high-voltage nonaqueous electrolyte. The high-voltage nonaqueous electrolyte comprises a solute, a solvent and a high-voltage additive, wherein a structure of the high-voltage additive is one or two shown in a following formula: wherein R1, R2 and R3 are selected from halogen, hydrogen, hydroxyl, oxygen metallide, alkyl, oxygen alkyl, one or two of halogen-substitute alkyl or halogen-substitute oxygen alkyl. The high-voltage nonaqueous electrolyte can be used under more than 4.5V high voltage. In addition, the invention also provides a lithium ion battery of the high-voltage nonaqueous electrolyte.

Description

technical field [0001] The invention relates to a high-voltage electrolytic solution, 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 materials is the most effective way to ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/0567H01M10/0525
CPCH01M10/0525H01M10/0567H01M10/4235Y02E60/10
Inventor 杨同勇
Owner HONOR DEVICE CO LTD
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