Honeycomb nickel selenide nanosheet array electrode material and preparation method thereof

A nanosheet array and electrode material technology, which is applied in the manufacture of hybrid capacitor electrodes, hybrid/electric double layer capacitors, etc., can solve the problem of less research on nickel selenide, and achieve the effects of low cost, high efficiency, and simple operation

Inactive Publication Date: 2018-03-20
ANYANG NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although there have been some reports on the synthesis of metal selenides, such as: CoSe 2 , SnSe 2 ,

Method used

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  • Honeycomb nickel selenide nanosheet array electrode material and preparation method thereof
  • Honeycomb nickel selenide nanosheet array electrode material and preparation method thereof
  • Honeycomb nickel selenide nanosheet array electrode material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0023] ① Add 0.0125mol of Se powder to 500mL of Na with a concentration of 0.1mol / L 2 SO 3 solution, stirred and heated to 110°C, refluxed for 6 hours until completely dissolved, and Na with a concentration of 0.025mol / L was obtained 2 SeSO 3 solution.

[0024] ②The commercially available thickness is 1.5mm, surface density is 280-420g / m 2 The nickel foam with a pore size of 0.2-0.6 mm is cut into a size of 1×4 cm, and treated with 3 mol / L hydrochloric acid for 30 minutes to remove oxides on the surface. Wash with absolute ethanol and deionized water alternately, and dry in vacuum for later use.

[0025] ③Add 40mL of 0.025mol / L Na 2 SeSO 3 solution, and then put the nickel foam treated in step ② into it, and after heating in water at 180°C for 12 hours, the reaction kettle was naturally cooled to room temperature, washed several times with absolute ethanol and deionized water, and vacuum-dried the sample to obtain Honeycomb NiSe nanosheet arrays.

[0026] The X-ray dif...

Embodiment 2

[0028] ① Add 0.010mol of Se powder to 500mL of Na with a concentration of 0.1mol / L 2 SO 3 solution, stirred and heated to 120°C, refluxed for 6 hours until completely dissolved, and obtained Na with a concentration of 0.020mol / L 2 SeSO 3 solution.

[0029] ②Cut commercially available nickel foam into a size of 1×4cm, and ultrasonically treat it with 3mol / L hydrochloric acid for 30 minutes to remove oxides on the surface. Wash with absolute ethanol and deionized water alternately, and dry in vacuum for later use.

[0030] ③Add 40mL of 0.020mol / L Na 2 SeSO 3 solution, and then put the nickel foam treated in step ② into it. After heating in water at 160°C for 12 hours, the reaction kettle was naturally cooled to room temperature, washed several times with absolute ethanol and deionized water, and vacuum-dried the sample to obtain a honeycomb NiSe nanosheet arrays.

[0031] The obtained honeycomb nickel selenide nanosheet arrays were directly used as working electrodes of s...

Embodiment 3

[0033] ① Add 0.0083mol of Se powder to 500mL of Na with a concentration of 0.1mol / L 2 SO 3 solution, stirred and heated to 110°C, refluxed for 6 hours until completely dissolved, and Na with a concentration of 0.017mol / L was obtained 2 SeSO 3 solution.

[0034] ②Cut commercially available nickel foam into a size of 1×4cm, and ultrasonically treat it with 3mol / L hydrochloric acid for 30 minutes to remove oxides on the surface. Wash with absolute ethanol and deionized water alternately, and dry in vacuum for later use.

[0035] ③In a polytetrafluoroethylene liner autoclave with a volume of 50mL, move into the 0.017mol / L Na prepared in step ① 2 SeSO 3 solution 40mL, then put the nickel foam treated in step ② into it, heat it in water at 180°C for 24 hours, cool the reaction vessel to room temperature naturally, wash it with absolute ethanol and deionized water several times, and dry the sample in vacuum to obtain Honeycomb NiSe nanosheet arrays.

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Abstract

The invention discloses a honeycomb nickel selenide nanosheet array electrode material and a preparation method thereof, and belongs to the technical field of supercapacitor electrode material preparation. The honeycomb nickel selenide nanosheet array electrode material is prepared according the steps of mixing Se powder and an Na2SO3 solution, and preparing an Na2SeSO3 solution with certain concentration through heating and refluxing; adding the prepared Na2SeSO3 solution into a high-pressure reactor, then adding preprocessed foamed nickel into the N2SeSO3 solution, controlling the reaction temperature and time, and acquiring a honeycomb nickel selenide nanosheet array. The acquired electrode material has excellent electrochemical performance, the specific capacitance can reach up to 3105F/g when the current density is 1.0A/g, and the specific capacitance can still reach up to 1460F/g even if the current density reaches up to 10A/g. The honeycomb nickel selenide nanosheet array electrode material is prepared by adopting a one-step hydrothermal method, and is cheap in raw material, simple to operate, low in cost, high in efficiency, free of impurities and high in purity. The honeycomb nickel selenide nanosheet array electrode material is applicable to supercapacitors.

Description

technical field [0001] The invention belongs to the technical field of supercapacitor electrode materials, and in particular relates to a honeycomb nickel selenide nanosheet array electrode material and a preparation method thereof. Background technique [0002] The performance of electrode materials plays a decisive role in the application of supercapacitors. So far, transition metal compounds have attracted great attention due to their abundant redox reactions, cheap cost, and high charge storage capacity. In particular, some compounds of manganese, cobalt, and nickel, which are abundant in nature and cheap, have become the most studied electrode materials. However, transition metal compounds usually have poor electrical conductivity, which increases the sheet resistance and charge transfer resistance of electrodes, resulting in greater internal resistance loss at high current densities. Therefore, searching for transition metal compounds with higher conductivity becomes...

Claims

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Application Information

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IPC IPC(8): H01G11/24H01G11/30H01G11/86
CPCY02E60/13H01G11/24H01G11/30H01G11/86
Inventor 杜卫民杜路路赵俊红许志献李强
Owner ANYANG NORMAL UNIV
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