A conductive polymer/snse for sodium-ion batteries x Nanoflower negative electrode composite material and preparation method thereof

A conductive polymer and sodium ion battery technology, applied in battery electrodes, batteries, negative electrodes, etc., can solve the problem of no composite material sodium battery negative electrode materials, etc., to improve electrochemical utilization, promote contact, and high charge-discharge ratio The effect of capacity

Active Publication Date: 2017-08-25
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no effective method to slow down the rapid capacity fading of tin selenides due to volume expansion during the process of deintercalating sodium.
So far, there is no technology for synthesizing tin selenide nanoflowers and effectively compounding polypyrrole and tin selenide nanoflowers to prepare composite materials, and there is no related report on related composite materials as anode materials for sodium batteries

Method used

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  • A conductive polymer/snse for sodium-ion batteries <sub>x</sub> Nanoflower negative electrode composite material and preparation method thereof
  • A conductive polymer/snse for sodium-ion batteries <sub>x</sub> Nanoflower negative electrode composite material and preparation method thereof
  • A conductive polymer/snse for sodium-ion batteries <sub>x</sub> Nanoflower negative electrode composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] First weigh 0.175g of tin tetrachloride pentahydrate, 0.055g of selenium oxide and 0.035g of o-phenanthroline into 40ml of oleylamine, stir in an oil bath at 70°C for 2h to obtain a transparent and clear solution, and then transfer the solution to high pressure In the reaction kettle, solvothermal reaction was carried out at 180 ° C for 24 h, after cooling, centrifuged and dried to obtain SnSe x nanoflowers.

[0039] Weigh 0.2g SnSe x Add nanoflowers and 0.02g cetyltrimethylammonium bromide into deionized water and sonicate for 5h, then add 0.4ml pyrrole monomer in an ice bath at 0°C and continue stirring for 2h, then slowly add 57ml dropwise to a concentration of 0.1mol / L of ammonium persulfate solution, under continuous stirring conditions, the polymerization reaction takes place for 3 hours, and the polypyrrole / SnSe x Nanoflower anode composite material.

[0040] The sodium battery composite negative electrode material prepared in this example and the sodium shee...

Embodiment 2

[0046] First weigh 0.175g of tin tetrachloride pentahydrate, 0.055g of selenium oxide and 0.018g of o-phenanthroline into 40ml of oleylamine, stir in an oil bath at 70°C for 2h to obtain a transparent and clear solution, and then transfer the solution to a high pressure In the reaction kettle, solvothermal reaction was carried out at 180 ° C for 24 h, after cooling, centrifuged and dried to obtain SnSe x nanoflowers.

[0047] Weigh 0.2g SnSe x Add nanoflowers and 0.02g cetyltrimethylammonium bromide into deionized water and sonicate for 3h, then add 0.4ml pyrrole monomer in an ice bath at 0°C and continue stirring for 1h, then slowly add 57ml dropwise to a concentration of 0.1mol / L ammonium persulfate solution, under continuous stirring conditions, the polymerization reaction takes place for 3 hours, and the polypyrrole / SnSex nanoflower negative electrode composite material can be obtained.

[0048] The tin phosphide / graphene negative electrode composite material prepared i...

Embodiment 3

[0050] First weigh 0.175g of tin tetrachloride pentahydrate, 0.055g of selenium oxide and 0.035g of o-phenanthroline into 40ml of oleylamine, stir in an oil bath at 75°C for 2h to obtain a transparent and clear solution, and then transfer the solution to high pressure In the reaction kettle, solvothermal reaction was carried out at 180 ° C for 24 h, after cooling, centrifuged and dried to obtain SnSe x nanoflowers.

[0051] Weigh 0.2g SnSe x Add nanoflowers and 0.02g of cetyltrimethylammonium bromide into deionized water and sonicate for 5h, then add 0.8ml of pyrrole monomer in an ice bath at 0°C and continue stirring for 2h, then slowly add 114ml dropwise to a concentration of 0.1mol / L ammonium persulfate solution, under continuous stirring conditions, the polymerization reaction takes place for 6 hours, and the polypyrrole / SnSe x Nanoflower anode composite material.

[0052] The tin phosphide / graphene negative electrode composite material prepared in this example and the...

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Abstract

The invention discloses a conductive polymer / SnSe<x> nanoflower anode composite material of a sodium-ion cell and a preparation method of the conductive polymer / SnSe<x> nanoflower anode composite material. The anode composite material is a three-dimensional structure material which is formed by evenly coating the surface of the SnSe<x> nanoflower with a conductive polymer; and the preparation method comprises the following steps: firstly, synthesizing the SnSe<x> nanoflower through a solvothermal method; secondly, ultrasonically dispersing the synthesized SnSe<x> nanoflower into deionized water; and finally coating the surface of the SnSe<x> nanoflower with a layer of conductive polymer through in-situ chemical polymerization reaction, so as to obtain the conductive polymer / SnSe<x> nanoflower anode composite material. The polypyrrole / SnSe<x> nanoflower composite material synthesized by the method is good in dispersity and regular and uniform in shape; through a test, the polypyrrole / SnSe<x> nanoflower composite material has high charge-discharge specific capacity, stable cycle performance and good rate capability after being prepared into a half-cell as a sodium-ion cell anode material; and the preparation method of the composite material is simple, reliable, good in process repeatability, high in operability and friendly to environment, and has a very wide application prospect.

Description

technical field [0001] The invention relates to a conductive polymer / SnSe for a sodium ion battery x The nano flower negative electrode composite material and its preparation method belong to the field of sodium ion batteries. Background technique [0002] Lithium-ion batteries are currently the dominant electrochemical energy storage system. With the rapid popularization of mobile devices such as personal computers, cameras, and mobile phones, and their good application prospects in electric vehicles and hybrid vehicles, the demand for lithium-ion batteries continues to increase. increase. However, rising lithium prices and limited reserves have become bottlenecks in mass production and large-scale commercialization. Sodium-ion batteries have attracted extensive attention due to their rich reserves of sodium resources and environmental friendliness. The research and development of sodium-ion batteries can alleviate the limited development of batteries caused by the shorta...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/58H01M4/62H01M4/136H01M4/1397
CPCH01M4/136H01M4/1397H01M4/362H01M4/58H01M4/62H01M2004/027H01M2220/10H01M2220/20Y02E60/10
Inventor 张治安赵星星张娟李劼赖延清
Owner CENT SOUTH UNIV
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