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A double metal selenide znse/cose 2 Electrode material and its preparation method and application

An electrode material and selenide technology, which is used in the manufacture of hybrid/electric double layer capacitors, hybrid capacitor electrodes, etc., can solve the problems of unsatisfactory electrochemical activity of electrode materials, etc. handy effect

Active Publication Date: 2021-08-24
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are only two morphologies of single particles (J.Mater.Chem.A, 2018, 6, 15710-15717) and nanowires (Nanomaterials 2019, 9, 1362) in the current research on Zn and Co double metal selenides. The atoms of these two morphologies have limited exposure on the surface, which makes the electrochemical activity of the prepared electrode materials not ideal enough to be applied in supercapacitors.

Method used

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  • A double metal selenide znse/cose <sub>2</sub> Electrode material and its preparation method and application
  • A double metal selenide znse/cose <sub>2</sub> Electrode material and its preparation method and application
  • A double metal selenide znse/cose <sub>2</sub> Electrode material and its preparation method and application

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] 1. Double metal selenide ZnSe / CoSe 2 Preparation of electrode material (preparation process such as figure 1 shown):

[0026] (1) Foamed nickel pretreatment: the base foamed nickel is ultrasonically cleaned with acetone, 3mol / L hydrochloric acid solution, deionized water and absolute ethanol successively to remove the nickel oxide layer on the surface to obtain the treated foamed nickel;

[0027] (2) Preparation of precursor: the treated foamed nickel and 0.025mol / L Zn(NO 3 ) 2 ·6H 2 O, 0.05mol / L Co(NO 3 ) 2 ·6H 2 O, 0.05mol / L urea, 0.1mol / L NH 4 The mixed solution of F and deionized water is placed in an autoclave, and then the autoclave is heated in an oven at 130°C for 5 hours for hydrothermal reaction, cooled to room temperature, washed with deionized water and ethanol in sequence, and dried to obtain the foamed nickel ZnSe / CoSe on 2 Precursor, that is, ZCS precursor;

[0028] (3) Selenization: The ZCS precursor and selenium powder were placed in a tube fu...

Embodiment 2

[0045] (1) Foamed nickel pretreatment: the base foamed nickel is cleaned successively with acetone, 3mol / L hydrochloric acid solution, deionized water and ethanol ultrasonically to remove the nickel oxide layer on the surface to obtain the treated foamed nickel;

[0046] (2) Preparation of precursor: the treated foamed nickel and 0.025mol / L Zn(NO 3 ) 2 ·6H 2 O, 0.05mol / L Co(NO 3 ) 2 ·6H 2 O, 0.05mol / L urea, 0.1mol / L NH 4 The mixed solution of F and deionized water is placed in an autoclave, and then the autoclave is heated in an oven at 140°C for 5 hours for hydrothermal reaction, cooled to room temperature, ultrasonically washed with deionized water and ethanol in turn, and dried to obtain foamed nickel ZnSe / CoSe on 2 Precursor, that is, ZCS precursor;

[0047] (3) Selenization: put the ZCS precursor and selenium powder in a tube furnace at a mass ratio of 1:1, and calcine and selenize at 300°C for 4 hours in an argon atmosphere to obtain the bimetallic selenide ZnSe / C...

Embodiment 3

[0049] (1) Foamed nickel pretreatment: the base foamed nickel is cleaned successively with acetone, 3mol / L hydrochloric acid solution, deionized water and ethanol ultrasonically to remove the nickel oxide layer on the surface to obtain the treated foamed nickel;

[0050] (2) Preparation of precursor: the treated foamed nickel and 0.025mol / L Zn(NO 3 ) 2 ·6H 2 O, 0.05mol / L Co(NO 3 ) 2 ·6H 2 O, 0.05mol / L urea, 0.1mol / L NH 4 The mixed solution of F and deionized water was placed in an autoclave, and then the autoclave was heated in an oven at 150°C for 5 hours for hydrothermal reaction, cooled to room temperature, washed with deionized water and ethanol in sequence, and dried to obtain the foamed nickel ZnSe / CoSe on 2 Precursor, that is, ZCS precursor;

[0051] (3) Selenization: put the ZCS precursor and selenium powder in a tube furnace at a mass ratio of 1:1, and calcine and selenize at 300°C for 4 hours in an argon atmosphere to obtain the bimetallic selenide ZnSe / CoSe ...

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Abstract

The invention discloses a double metal selenide ZnSe / CoSe 2 Electrode material, based on nickel foam, loaded with bimetallic selenide ZnSe / CoSe with 3D layered sea urchin-like morphology 2 . The invention also discloses a preparation method of the electrode material and its application in supercapacitor cathode materials. Prepared double metal selenide ZnSe / CoSe 2 The electrode material has a 3D layered sea urchin-like morphology, has an ultra-high specific capacity, and exhibits excellent cycle stability after 5000 cycles. Bimetallic selenide ZnSe / CoSe supported on nickel foam was prepared by combining hydrothermal method and calcination method with nickel foam as substrate 2 The electrode material solves the problem of poor repeatability of the electrochemical performance of the electrode material prepared by the two-step hydrothermal method in the prior art; the 3D layered sea urchin-like morphology structure greatly optimizes the electrochemical performance of the electrode material and can be used as a supercapacitor Cathode material.

Description

technical field [0001] The present invention relates to double metal selenide ZnSe / CoSe 2 Electrode material and its preparation method and application, especially a kind of double metal selenide ZnSe / CoSe for supercapacitor 2 Electrode material and its preparation method. Background technique [0002] A supercapacitor is 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 characteristics of energy storage of batteries. Compared with traditional energy storage methods, its advantages are: high power density, up to 102-104W / kg, much higher than the power density level of batteries; long cycle life, 500,000 cycles of high-speed deep charge and discharge in a few seconds After one million times, the characteristics of the supercapacitor change very little, and the capacity and internal resistance only decrease by 10% to 20%. Its capa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/24H01G11/26H01G11/30H01G11/86
CPCH01G11/24H01G11/26H01G11/30H01G11/86Y02E60/13
Inventor 程林陈闪闪
Owner SOUTHEAST UNIV