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Selenium-doped nickel-cobalt sulfide with cross-linked nanosheet structure and preparation method of selenium-doped nickel-cobalt sulfide

A nickel-cobalt sulfide and selenium doping technology, applied in nickel compounds, chemical instruments and methods, nickel sulfide, etc., can solve nickel-cobalt sulfide low conductivity, slow charge transfer kinetics, and multiple oxidation of charge transfer kinetics Reduce active sites and other issues to achieve the effects of improving electrochemical performance, solving slow reaction kinetics, enhancing electrical conductivity and redox reaction activity

Pending Publication Date: 2022-05-13
HEBEI UNIV OF ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The selenium-doped nickel-cobalt sulfide material forms a one-dimensional nanotube array, and the arrays are interwoven with nanosheets to form a network structure, which has high conductivity, large charge transfer kinetics and more oxidation Reducing active sites, solving the shortcomings of low conductivity and slow charge transfer kinetics of nickel cobalt sulfide

Method used

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  • Selenium-doped nickel-cobalt sulfide with cross-linked nanosheet structure and preparation method of selenium-doped nickel-cobalt sulfide
  • Selenium-doped nickel-cobalt sulfide with cross-linked nanosheet structure and preparation method of selenium-doped nickel-cobalt sulfide
  • Selenium-doped nickel-cobalt sulfide with cross-linked nanosheet structure and preparation method of selenium-doped nickel-cobalt sulfide

Examples

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Effect test

Embodiment 1

[0042] A method for preparing a selenium-doped nickel-cobalt sulfide electrode material with an intercrosslinked nanosheet structure. Specific steps include:

[0043] ① from nickel chloride hexahydrate (NiCl 2 ·6H 2 O), cobalt chloride hexahydrate (CoCl 2 ·6H 2 O) and urea (CO(NH 2 ) 2 ) as a raw material, with a mass ratio of 1:2:2, reacting at a temperature of 120° C. for 8 hours by a hydrothermal method to prepare a nickel-cobalt precursor;

[0044] ② Place the nickel-cobalt precursor synthesized in step ① in a high-pressure reactor containing 50mM sodium sulfide solution, and react at a temperature of 120°C for 10h to carry out ion exchange reaction to obtain nickel-cobalt sulfide (NiCoS);

[0045] 3. The nickel-cobalt sulfide of gained is subjected to heat treatment selenization reaction, and the concrete process of heat treatment selenization process is: when nickel-cobalt sulfide and selenium powder are 11:5 by mass (selenium powder introduction amount is 5mg), 35...

Embodiment 2

[0048] The difference between this embodiment and Example 1 is that, for the selenium-doped nickel-cobalt sulfide material, nickel-cobalt sulfide and selenium powder are 11:10 by mass in the heat treatment selenization process (the amount of selenium powder introduced is 10mg).

Embodiment 3

[0050] The difference between this embodiment and Example 1 is that, for the selenium-doped nickel-cobalt sulfide material, nickel-cobalt sulfide and selenium powder are 11:20 by mass in the heat treatment selenization process (the introduction amount of selenium powder is 20mg).

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Abstract

The invention relates to selenium-doped nickel-cobalt sulfide with a cross-linked nanosheet structure and a preparation method of the selenium-doped nickel-cobalt sulfide. The selenium-doped nickel-cobalt sulfide is prepared by introducing selenium into nickel-cobalt sulfide through heat treatment in a nitrogen atmosphere. The selenium-doped nickel-cobalt sulfide material forms a one-dimensional nanotube array, the arrays are interwoven through nanosheets to form a network structure, the selenium-doped nickel-cobalt sulfide material has high conductivity and high electrochemical activity, and the defects that nickel-cobalt sulfide is low in conductivity and slow in charge transfer kinetics are overcome.

Description

technical field [0001] The invention relates to a high-performance selenium-doped nickel-cobalt sulfide with an intercrosslinked nanosheet structure and a preparation method thereof, belonging to the technical field of supercapacitor energy storage. Background technique [0002] As an important energy storage material, nickel cobalt sulfide has high theoretical specific capacitance and redox reactivity, and has an important application prospect in supercapacitors. However, the current nickel-cobalt sulfides still have problems such as slow charge transfer kinetics, few active sites, and low rate performance, which seriously hinder their further applications. [0003] So far, an effective measure is: doping selenium into nickel-cobalt sulfide, and improving and optimizing nickel through the excellent characteristics of selenium itself, such as lower electronegativity, higher conductivity and redox activity. The electrochemical performance of cobalt sulfide electrode material...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/24H01G11/30C01B19/02C01G53/00C01G53/11
CPCH01G11/24H01G11/30C01G53/11C01G53/006C01B19/02C01P2002/72C01P2004/03C01P2004/04C01P2004/80C01P2004/61C01P2004/62
Inventor 张志晓刘蓉张晓荣周傲
Owner HEBEI UNIV OF ENG
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