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Three-dimensional heterojunction-structured nickel cobalt sulfide electrode material and preparation method and application thereof

A technology of cobalt-nickel sulfide and heterostructure, which is applied in the manufacture of hybrid capacitor electrodes and hybrid/electric double layer capacitors, etc., to achieve the effects of favorable charge transmission, stable performance, and excellent supercapacitor performance

Active Publication Date: 2017-05-17
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The object of the present invention is to overcome prior art and adopt more complicated two-step method to prepare three-dimensional sheet-like NiCo 2 S 4 Electrode material defects, providing a three-dimensional heterostructure of NiCo 2 S 4 Preparation method of electrode material

Method used

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  • Three-dimensional heterojunction-structured nickel cobalt sulfide electrode material and preparation method and application thereof
  • Three-dimensional heterojunction-structured nickel cobalt sulfide electrode material and preparation method and application thereof
  • Three-dimensional heterojunction-structured nickel cobalt sulfide electrode material and preparation method and application thereof

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Embodiment 1

[0027] 1. Put the carbon paper in a mixed methanol solution of 0.5mol / L thiourea and 0.0.08mol / L sodium sulfide in advance to react at 180°C for 2h, then take it out and wash it with deionization, and dry it at 90°C for 10h to obtain sulfur doping Modified carbon paper support.

[0028] 2. Add 0.42mol / L of Co(NO 3 ) 2 ·6H 2 O, 0.21mol / L Ni(NO 3 ) 2 ·6H 2 O and 0.9mol / L of thiourea were dissolved in methanol, stirred and mixed evenly, and then transferred to the autoclave. At the same time, a sulfur-doped modified carbon paper carrier was placed in the autoclave, and the autoclave was sealed and placed in Reaction at 180°C for 4h.

[0029] 3. Take out the carbon paper, wash it with deionized water, and dry it at 90°C for 10 hours to obtain the NiCo loaded with carbon paper as the electrode carrier. 2 S 4 Active component electrode material. figure 1 SEM images of the carbon paper carrier before and after sulfur modification. in, figure 1 (a) is the SEM image of unmod...

Embodiment 2

[0031] 1. Put the carbon cloth in a mixed methanol solution of 0.5mol / L thiourea and 0.1mol / L sodium chloride in advance to react at 180°C for 2h, then take it out and wash it with deionization, and dry it at 80°C for 12h to obtain sulfur doping Modified carbon cloth support.

[0032] 2. Add 0.28mol / L of Co(NO 3 ) 2 ·6H 2 O, 0.14mol / L Ni(NO 3 ) 2 ·6H 2 O and 0.6mol / L of thiourea were dissolved in water, stirred and mixed evenly, and then transferred to the autoclave. At the same time, a sulfur-doped modified carbon cloth carrier was placed in the autoclave, and the autoclave was sealed and placed at 180 ℃ reaction 2h.

[0033]3. Take out the carbon cloth, wash it with deionized water, and dry it at 80°C for 12 hours to obtain the NiCo loaded with sulfur-doped modified carbon cloth as the electrode carrier. 2 S 4 electrode material. figure 2 For the NiCo prepared in Example 2 2 S 4 SEM image. From figure 2 It can be seen that the prepared NiCo 2 S 4 The materia...

Embodiment 3

[0035] 1. Pre-place the carbon paper in a mixed ethanol solution of 0.8mol / L thiourea and 0.12mol / L sodium sulfide at 120°C for 8h, then take it out and wash it with deionization, and dry it at 60°C for 16h to obtain the sulfur-doped modification. permanent carbon paper carrier.

[0036] 2. Add 0.14mol / L of CoCl 2 ·6H 2 O, 0.07mol / L NiCl 2 ·6H 2 O and 0.3mol / L thioacetamide were dissolved in methanol, stirred and mixed evenly, and then transferred to an autoclave, and a sulfur-doped modified carbon paper carrier was placed in the autoclave at the same time, and the autoclave was sealed. Placed at 220°C for 1h.

[0037] 3. Take out the carbon paper, wash it with deionized water, and dry it at 60°C for 16 hours to obtain the NiCo loaded with sulfur-doped modified carbon paper as the electrode carrier. 2 S 4 electrode material.

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Abstract

The invention discloses a three-dimensional heterojunction-structured nickel cobalt sulfide (NiCo<2>S<4>) electrode material and a preparation method thereof. The preparation method comprises the following steps of modifying a carbon material carrier, and then mixing the carrier with a cobalt salt, a nickel salt and a sulfur source, next, performing a hydrothermal reaction in a high-voltage reaction kettle, and performing washing and drying to obtain the three-dimensional heterojunction-structured NiCo<2>S<4> electrode material. The three-dimensional heterojunction-structured NiCo<2>S<4> electrode material is prepared by adopting a one-step method; the method has the advantages of stable performance and high process repeatability; and the prepared three-dimensional heterojunction-structured NiCo<2>S<4> electrode material has excellent super-capacitance performance.

Description

technical field [0001] The invention belongs to the field of preparation of supercapacitor electrode materials, in particular to a three-dimensional heterogeneous cobalt nickel sulfide (NiCo 2 S 4 ) Electrode materials and their preparation methods and applications. Background technique [0002] Supercapacitor is a new type of energy storage device between traditional capacitors and batteries, which has the advantages of high power, long life, and no pollution. "Explore" magazine listed it as one of the world's seven technological discoveries in 2006, and considered supercapacitors to be a revolutionary development in the field of energy storage. Electrode materials are the core part of supercapacitors, which directly affect the performance and application prospects of supercapacitors. The development of electrode materials with environmental protection, low cost, good stability and good electrochemical performance has become a research hotspot. At present, transition met...

Claims

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Application Information

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IPC IPC(8): H01G11/24H01G11/30H01G11/86
CPCY02E60/13H01G11/24H01G11/30H01G11/86
Inventor 铁津津孙明陈丰叶飞余林
Owner GUANGDONG UNIV OF TECH
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