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Topological energy storage material and preparation method thereof

A technology for energy storage materials and composite energy storage materials, which is applied in the field of new topological energy storage materials and their preparation, can solve the problems of limited practical application and limited effect due to volume change, and achieves alleviation of battery heating problems, low cost and simple preparation method. Effect

Active Publication Date: 2018-06-22
SINOCAT ENVIRONMENTAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Tin-based anode has the advantages of low cost and high capacity, and has attracted widespread attention, but its volume change problem limits its practical application. Researchers have sought to use tin compounds to improve, but the effect is limited

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032]A topological energy storage material, including: a topological insulator, a high-capacity energy storage material, and a coating material coated on the outer layer of the above two materials, and the high-capacity energy storage material refers to a battery negative electrode with a specific capacity >500mAh / g Material.

[0033] Topological insulators include Bi 2 Se 3 , SnSe 2 , Sb 2 Te 3 、 Bi 2 Te 3 at least one of.

[0034] High-capacity energy storage materials are selected from Sn, SnSe 2 , at least one of oxides of Sn.

[0035] The coating material is at least one selected from graphite, graphene, carbon nanotubes, hard carbon and soft carbon.

[0036] The preparation process is to prepare a topological insulator, compound the topological insulator with a high-capacity energy storage material, and finally coat it; or prepare a topological insulator, coat the topological insulator, and then compound and then coat it with a high-capacity energy storage mate...

Embodiment 2

[0039] A topological energy storage material, including: a topological insulator, a high-capacity energy storage material, and a coating material coated on the outer layer of the above two materials, and the high-capacity energy storage material refers to a battery negative electrode with a specific capacity >500mAh / g Material.

[0040] The preparation method of the above-mentioned topological energy storage material comprises the following steps:

[0041] (1) First mix oleic acid and oleamide evenly, feed inert gas to remove air and raise to reaction temperature at the same time; the volume ratio of oleic acid and oleamide added in step (1) is controlled at 100:2, oleic acid and oleic acid The reaction temperature of the amide mixed solution is 250 degrees Celsius;

[0042] (2) Dibenzyl diselenide and triphenyl bismuth are added in oleic acid and oleamide mixed liquid, keep temperature and make bismuth selenide nano-sheet, add tin acetylacetonate and dibenzyl diselenide subs...

Embodiment 3

[0045] A topological energy storage material, including: a topological insulator, a high-capacity energy storage material, and a coating material coated on the outer layer of the above two materials, and the high-capacity energy storage material refers to a battery negative electrode with a specific capacity >500mAh / g Material.

[0046] The preparation method of the above-mentioned topological energy storage material comprises the following steps:

[0047] (1) First, oleic acid and oleamide are mixed evenly, and an inert gas is introduced to remove the air while rising to the reaction temperature; the volume ratio of oleic acid and oleamide added in step (1) is controlled between 100:4, and the oleic acid The reaction temperature of the mixed solution with oleamide is between 280 degrees Celsius;

[0048] (2) Dibenzyl diselenide and triphenyl bismuth are added in oleic acid and oleamide mixed liquid, keep temperature and make bismuth selenide nano-sheet, add tin acetylacetona...

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Abstract

The invention provides a topological energy storage material and a preparation method thereof. The topological energy storage material comprises a topological insulator, a high-capacity energy storagematerial and a coating material coating outer layers of the front two materials, wherein the high-capacity energy storage material is a negative electrode material, with the specific capacity of over500mAh / g, for a battery; the topological insulator comprises at least one of Bi2Se3, SnSe2, Sb2Te3 and Bi2Te3; the high-capacity energy storage material is selected from at least one of Sn, the SnSe2and an oxide of the Sn; and the coating material is selected from at least one of graphite, graphene, a carbon nanotube, hard carbon and soft carbon. According to the topological energy storage material, a composite nanomaterial with excellent rate capability is developed by combining excellent electron conduction capacity of the surface of the topological insulator with high specific energy characteristic of a tin-based material, and the composite material is coated with a little of graphite, so that capacity attenuation caused by a volume change in the charging and discharging processes isimproved and the material has better electrochemical properties.

Description

technical field [0001] The present invention relates to the technical field of application of the novel "topological energy storage" concept in energy storage materials, in particular to a novel topological energy storage material comprising topological insulators (Topological insulators) and a preparation method thereof. Background technique [0002] According to the different conductivity properties, materials can be divided into two categories: "metal" and "insulator". Furthermore, according to the topological properties of the electronic state, "insulator" and "metal" can be further divided into more detailed divisions. Topological insulators are a class of insulators that are distinguished from other common insulators according to such new standards. Therefore, the body of a topological insulator is insulating like the insulators that people generally recognize, but there are always conductive edge states on its boundary or surface, which is the most unique property dif...

Claims

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Application Information

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IPC IPC(8): H01M4/62
CPCH01M4/624Y02E60/10
Inventor 吴孟强陈治徐自强陈诚涂铖阳陈金琛杨俭
Owner SINOCAT ENVIRONMENTAL TECH
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