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Hollow spherical tantalum-doped Cu<7>S<4> material as well as preparation method and application thereof

A spherical and hollow technology, applied in the manufacture of hybrid/electric double layer capacitors, hybrid capacitor electrodes, etc., can solve the problems of large amount of ruthenium oxide, failure to modify the electronic structure, high cost, etc.

Active Publication Date: 2020-06-23
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the amount of ruthenium oxide is large and the cost is high, which is not conducive to large-scale production. At the same time, the physical combination of the two materials cannot modify the respective electronic structures and cannot further improve the electrochemical performance.

Method used

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  • Hollow spherical tantalum-doped Cu&lt;7&gt;S&lt;4&gt; material as well as preparation method and application thereof
  • Hollow spherical tantalum-doped Cu&lt;7&gt;S&lt;4&gt; material as well as preparation method and application thereof
  • Hollow spherical tantalum-doped Cu&lt;7&gt;S&lt;4&gt; material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] A. Dissolve 5mmol copper nitrate, 0.5mmol tantalum pentachloride and 0.2g sodium lauryl sulfate in 20ml ethylene glycol to form a mixed solution A, dissolve 0.2g sodium hydroxide in 10ml ethylene glycol solution to form a mixed solution Solution B, uniformly mix solution A and solution B to obtain mixed solution C; transfer to a high-pressure reactor, react at 180°C for 12 hours, filter, wash the filter cake with deionized water until neutral, and dry to obtain the precursor powder ;

[0044] B. Evenly disperse 30 mg of the precursor powder obtained in step A in 30 ml of sodium sulfide ethylene glycol solution with a sodium sulfide content of 0.1 mol / L, and keep it in a water bath at 55°C for 3 hours at a constant temperature; filter and use the filter cake Wash with ionic water until neutral, and dry in vacuum for 12 hours to get Ta / Cu 7 S 4 Material. Determination of Ta / Cu by X-ray Photoelectron Spectroscopy 7 S 4 The content of each element, the results are show...

Embodiment 2

[0048] A. Dissolve 5mmol copper nitrate, 0.625mmol tantalum pentachloride and 0.15g sodium lauryl sulfate in 20ml ethylene glycol to form a mixed solution A, dissolve 0.2g sodium hydroxide in 10ml ethylene glycol solution to form a mixed solution For solution B, mix solution A and solution B uniformly to obtain mixed solution C; transfer to a high-pressure reactor, react at 160°C for 10 hours, filter, wash the filter cake with deionized water until neutral, and dry to obtain the precursor powder ;

[0049] B. Evenly disperse 40 mg of the precursor powder obtained in step A in 30 ml of ethylene glycol solution of sodium sulfide with a sodium sulfide content of 0.1 mol / L, and keep it in a water bath at 55°C for 4 hours at a constant temperature; filter and use the filter cake Wash with ionic water until neutral, and dry in vacuum for 12 hours to get Ta / Cu 7 S 4 Material. Determination of Ta / Cu by X-ray Photoelectron Spectroscopy 7 S 4 The content of each element in it, amon...

Embodiment 3

[0051] A. Dissolve 5mmol copper nitrate, 0.5mmol tantalum pentachloride and 0.15g sodium lauryl sulfate in 20ml ethylene glycol to form a mixed solution A, dissolve 0.16g sodium hydroxide in 10ml ethylene glycol solution to form a mixed solution For solution B, mix solution A and solution B evenly to obtain mixed solution C; transfer to a high-pressure reactor, react at 160°C for 8 hours, filter, wash the filter cake with deionized water until neutral, and dry to obtain the precursor powder ;

[0052] B. Evenly disperse 50 mg of the precursor powder obtained in step A in 30 ml of ethylene glycol solution of sodium sulfide with a sodium sulfide content of 0.1 mol / L, and keep it at a constant temperature for 2.5 hours in a water bath at 55° C.; filter and use the filter cake Wash with deionized water until neutral, and dry in vacuum for 8 hours to obtain Ta / Cu 7 S 4 Material. Determination of Ta / Cu by X-ray Photoelectron Spectroscopy 7 S 4 The content of each element in it,...

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Abstract

The invention provides a hollow spherical tantalum-doped Cu<7>S<4> material as well as a preparation method and application thereof. The chemical formula of the hollow spherical tantalum-doped Cu<7>S<4> material prepared by the invention is expressed as Ta / Cu<7>S<4>, wherein the atomic percentage content of Ta element is 1.6-3.2%; and the material is of a hollow sphere structure, and the diameterof the material is 2-10 microns. The preparation method used in the invention comprises: dissolving copper nitrate, tantalum pentachloride, sodium hydroxide and lauryl sodium sulfate in ethylene glycol to form a mixed solution, and carrying out solvothermal treatment to obtain precursor powder; and uniformly dispersing the obtained precursor powder in an ethylene glycol solution of sodium sulfide,carrying out a heating vulcanization reaction to generate Ta / Cu<7>S<4>, and carrying out filtering, cleaning and vacuum drying to obtain a target product. The material has relatively high specific capacity and excellent rate capability, and is suitable for being applied to a supercapacitor negative electrode material.

Description

Technical field: [0001] The invention relates to the technical field of supercapacitor electrode materials, in particular to a Ta / Cu 7 S 4 An electrode material and a preparation method thereof, the material is mainly used as an anode material of a supercapacitor. Background technique: [0002] Supercapacitors, also known as electrochemical capacitors, are mainly adsorbed on the electrodes through the directional movement of anions and cations in the electrolyte under the condition of an external electric field, thereby forming an electric double layer effect between the two plates or through electrode materials and electrolysis. The purpose of energy storage is achieved through the oxidation-reduction reaction of liquid-liquid interaction. Generally, according to different energy storage mechanisms, supercapacitors can be divided into electric double layer capacitors and faraday pseudocapacitors. The main electrode material of electric double layer supercapacitor is carb...

Claims

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Application Information

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IPC IPC(8): H01G11/86H01G11/30H01G11/26
CPCH01G11/26H01G11/30H01G11/86Y02E60/13
Inventor 雷晓东韩旭朝张东彬孔祥贵蒋美红
Owner BEIJING UNIV OF CHEM TECH
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