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CdS @ Ni3S2 core-shell heterostructure composite material, preparation method and application thereof

A technology of heterostructures and composite materials, applied in the field of composite materials, can solve the problems affecting the application of supercapacitors, poor cycle stability, small capacitance, etc.

Active Publication Date: 2017-02-22
ANHUI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the past few decades, scientists have conducted extensive research on transition metal oxides, hydroxides, and conductive polymer materials, but there are still phenomena of small capacitance and poor cycle stability, which affect the actual performance of supercapacitors. application

Method used

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  • CdS @ Ni3S2 core-shell heterostructure composite material, preparation method and application thereof
  • CdS @ Ni3S2 core-shell heterostructure composite material, preparation method and application thereof
  • CdS @ Ni3S2 core-shell heterostructure composite material, preparation method and application thereof

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preparation example Construction

[0021] The invention provides a CdS@Ni 3 S 2 A method for preparing a core-shell heterostructure composite material, comprising:

[0022] 1) nickel foam is placed in acid solution for acidification;

[0023] 2) Put the acidified nickel foam in the closed reaction solution for hydrothermal reaction, then wash and dry to prepare CdS@Ni 3 S 2 Core-shell heterostructure composites;

[0024] Wherein, the reaction solution contains water, cadmium sulfide and thiourea.

[0025] In the above preparation method, the specific type of acid solution can be selected in a wide range, but in order to make the surface of foamed nickel clean, and then make the prepared CdS@Ni 3 S 2 The core-shell heterostructure composite material has more excellent capacitance, specific capacitance and stability. Preferably, in step 1), the acid solution is selected from one or more of hydrochloric acid solution, sulfuric acid solution or phosphoric acid solution.

[0026] In the above preparation meth...

Embodiment 1

[0039] 1) Pretreatment of foamed nickel: Soak foamed nickel (2cm×2cm, 1.3mm, weight 0.1488g) in 2mol / L hydrochloric acid solution for 20 minutes and then wash it with deionized water at 25°C 10min;

[0040] 2) Dissolve 0.25mmol cadmium sulfide and 1mmol thiourea in 35ml deionized water and stir for 30 minutes to form a mixed solution, then immerse the acidified nickel foam in the mixed solution, then transfer the reaction system to a 50ml reactor and seal it Carry out hydrothermal reaction (reaction at 160°C for 12h), take it out after cooling, wash with deionized water and absolute ethanol three times respectively, and dry at 60°C to prepare CdS@Ni 3 S 2 Core-shell heterostructure composite A1.

Embodiment 2

[0042] Prepare CdS@Ni according to the method of Example 1 3 S 2 Core-shell heterostructure composite material A2, the difference is: nickel foam meets the following conditions: the specification is 2cm×3cm, the thickness is 1mm, and the weight is 0.148g; the content of cadmium sulfide in the mixed solution is 0.12mmol, and the content of thiourea is 0.8mmol; the condition of the hydrothermal reaction is to react at 150°C for 10h.

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Abstract

The invention discloses a CdS @ Ni3S2 core-shell heterostructure composite material, a preparation method and an application thereof. The preparation method comprises the following steps of 1) placing foam nickel in an acid solution for acidizing; and 2) placing the acidized foam nickel in a closed reaction solution for a hydrothermal reaction, and then cleaning and drying so as to acquire a CdS @ Ni3S2 core-shell heterostructure composite material, wherein the reaction solution contains water, cadmium sulfide and thiourea. The CdS @ Ni3S2 core-shell heterostructure composite material prepared through the method possesses an excellent capacitance, a specific capacitance and stability and the CdS @ Ni3S2 core-shell heterostructure composite material can be used as an electrode material of a super capacitor or a lithium ion battery. Besides, operation of the preparation method is simple, a raw material is easy to get and cost is low.

Description

technical field [0001] The present invention relates to composite materials, in particular to a CdS@Ni 3 S 2 Core-shell heterostructure composites and their preparation methods and applications. Background technique [0002] Due to the consumption of fossil fuels and the increasingly serious environmental pollution, energy has become a major problem facing the world in recent years. In order to meet the ever-increasing energy demand, it is necessary to develop green energy storage devices with high power and excellent stability. Supercapacitors are one of the most ideal green energy storage materials because of their high power density, long cycle life, and safe operation. At present, improving capacitance, enhancing cycle stability, and designing excellent electrode structures are an integral part of the development of supercapacitors. In the past few decades, scientists have conducted extensive research on transition metal oxides, hydroxides, and conductive polymer mat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/86H01G11/24H01G11/30H01M4/36H01M4/58
CPCH01G11/24H01G11/30H01G11/86H01M4/366H01M4/5815Y02E60/10Y02E60/13
Inventor 王秀华石波
Owner ANHUI NORMAL UNIV
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