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Nickel selenide-trinickel diselenide nanorod composite material, and preparation method and application thereof

A technology of composite materials and nickel selenide, which is applied in the direction of nanotechnology, nanotechnology, hybrid/electric double layer capacitor manufacturing, etc., to achieve the effect of cheap and easy-to-obtain raw materials, simple process flow, and good electrochemical performance

Inactive Publication Date: 2021-10-01
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In recent years, with the in-depth research on nickel-based electrode materials, the composite materials formed by combining them with transition metal compounds have also attracted much attention. Most of the research is Ni 3 S 2 / CoS, NiS / Ni 3 S 2 、NiS / NiMoO 4 and other composite electrode materials, but for Ni 3 Se 2 / NiSe nanorod composite structure is rarely involved

Method used

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  • Nickel selenide-trinickel diselenide nanorod composite material, and preparation method and application thereof
  • Nickel selenide-trinickel diselenide nanorod composite material, and preparation method and application thereof
  • Nickel selenide-trinickel diselenide nanorod composite material, and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0021] Dissolve 0.8mmoL of Se powder into 20mL of anhydrous ethylenediamine to form a uniform solution A, then add 10mL of anhydrous ethanol mixed homogeneous solution to solution A, and stir thoroughly with magnetic stirring to form a uniform solution B. Finally, transfer the uniform solution B to a 100mL polytetrafluoroethylene reactor and add the treated foam nickel (3cm×2cm×1.5mm), and react in a blast drying oven at 180°C for 10h to prepare the composite material Ni 3 Se 2 / NiSe.

Embodiment 2

[0023] On the basis of Example 1, the reaction temperature was adjusted to be 160 degrees centigrade, and the time was 12 hours.

Embodiment 3

[0025] On the basis of Example 1, the reaction temperature was adjusted to be 190 degrees centigrade, and the time was 8 hours.

[0026] The following composite structure Ni 3 Se 2 / NiSe electrode material is example, to the Ni of the present invention preparation 3 Se 2 / NiSe nanorod composite structure electrode material (Example 1) for characterization. SEM picture as figure 1 As shown, it can be clearly seen that nanorods grow in situ on the surface of nickel foam, and the growth on the nickel foam is very uniform and has a firm structure. figure 2 is the X-ray powder diffraction (XRD) pattern of the electrode material. The data at 29.6°, 29.9°, 37.2°, 47.7° and 52.7° correspond to Ni 3 Se 2 (JCPDS No.85-0754) characteristic peak, the corresponding crystal planes of the peaks are (110), (012), (003), (211) and (122) crystal planes respectively; and at 31.0°, 34.0° , 38.7°, 48.0°, 50.4° and 55.1° correspond to the characteristic peaks of NiSe (JCPDS No.18-0887), an...

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Abstract

The invention discloses a nickel selenide-trinickel diselenide nanorod composite material, and a preparation method and application thereof. Foamed nickel serves as a nickel source, Se powder serves as a selenium source, a Ni3Se2 / NiSe nanorod composite structure electrode material is generated on the surface of the foamed nickel in situ through a one-step solvothermal method, the nickel selenide-trinickel diselenide nanorod composite material has excellent electrochemical performance, and the maximum specific capacity of the nickel selenide-trinickel diselenide nanorod composite material is 1068.0 [mu]Ahcm<-2>. The transition metal selenide prepared by the method has more active sites compared with a common transition metal selenide, has better electrochemical performance when being used as an electrode material, is cheap and easily available in raw materials and simple in process flow, and is expected to realize industrial preparation of the transition metal selenide.

Description

technical field [0001] The invention belongs to the technical field of new composite materials, more specifically, relates to a Ni 3 Se 2 / NiSe nanorod composite positive electrode material and a preparation method thereof, which are mainly applied to the positive electrode material of supercapacitors. [0002] technical background [0003] Supercapacitor refers to a new type of energy storage device between traditional capacitors and rechargeable batteries. It not only has the characteristics of fast charging and discharging of capacitors, but also has the energy storage characteristics of batteries. Compared with other energy storage devices, the outstanding advantages are high power density, short charge and discharge time, long cycle life, and wide operating temperature range. It is the largest capacitor in the world that has been put into mass production. Therefore, it has great potential application value in electrochemical energy storage fields such as mobile communi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/30H01G11/86B82Y30/00B82Y40/00
CPCH01G11/30H01G11/86B82Y30/00B82Y40/00Y02E60/13
Inventor 陈亚楠陈方帅邓意达胡文彬
Owner TIANJIN UNIV
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