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CoS/CoNi(OH)<4> porous nanocomposite and preparation method thereof

A nanocomposite material, 2·6H2O technology, applied in nanotechnology, nanotechnology, hybrid/electric double layer capacitor manufacturing, etc., can solve the problem of unsatisfactory cycle stability, achieve scientific and reasonable preparation method, novel appearance, good effect

Inactive Publication Date: 2018-12-07
NORTHEAST DIANLI UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, its cycle stability is not ideal. At a current density of 3A / g, after 3000 cycles, the specific capacitance only maintains 73.8%.

Method used

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  • CoS/CoNi(OH)&lt;4&gt; porous nanocomposite and preparation method thereof
  • CoS/CoNi(OH)&lt;4&gt; porous nanocomposite and preparation method thereof
  • CoS/CoNi(OH)&lt;4&gt; porous nanocomposite and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0025] Embodiment 1, a kind of CoS / CoNi(OH) 4 The preparation method of the porous nanocomposite material, the preparation steps are:

[0026] (1) Add 1mmol Co(NO 3 ) 2 ·6H 2O was dissolved in 25 mL of methanol to obtain Co(NO 3 ) 2 ·6H 2 O solution; 4mmol 2-methylimidazole was dissolved in 25mL methanol to obtain a 2-methylimidazole solution; under stirring conditions, the Co(NO 3 ) 2 ·6H 2 The O solution and the 2-methylimidazole solution were quickly mixed, stirred for 30 minutes, and left to stand at room temperature for 24 hours. The resulting product was washed with methanol and then vacuum-dried at 60°C for 12 hours to obtain ZIF-67; wherein, ZIF- 67 is cobalt ion metal organic framework; Co(NO 3 ) 2 ·6H 2 O is cobalt nitrate;

[0027] (2) Weigh 0.36mmol of ZIF-67 as a precursor, and ultrasonically disperse it in 25mL of absolute ethanol to obtain a uniformly dispersed ZIF-67 absolute ethanol dispersion; weigh 0.06mmol of TAA and dissolve it in 25mL of absol...

Embodiment 2

[0029] Embodiment 2, a kind of CoS / CoNi(OH) 4 The preparation method of the porous nanocomposite material, the preparation steps are:

[0030] (1) Add 1mmol Co(NO 3 ) 2 ·6H 2 O was dissolved in 25 mL of methanol to obtain Co(NO 3 ) 2 ·6H 2 O solution; 4mmol 2-methylimidazole was dissolved in 25mL methanol to obtain 2-methylimidazole solution, and under stirring conditions, the Co(NO 3 ) 2 ·6H 2 The O solution and the 2-methylimidazole solution were quickly mixed, stirred for 30 minutes, and left to stand at room temperature for 24 hours. After washing with methanol, the obtained product was vacuum-dried at 60° C. for 12 hours to obtain ZIF-67;

[0031] (2) Weigh 0.36mmol of ZIF-67 as a precursor, and ultrasonically disperse it in 25mL of absolute ethanol to obtain a uniformly dispersed ZIF-67 absolute ethanol dispersion; weigh 0.13mmol of TAA and dissolve it in 25mL of absolute ethanol, Obtain the TAA solution; under the condition of stirring, quickly add the TAA solu...

Embodiment 3

[0033] Embodiment 3, a kind of CoS / CoNi(OH) 4 The preparation method of the porous nanocomposite material, the preparation steps are:

[0034] (1) Add 1mmol Co(NO 3 ) 2 ·6H 2 O was dissolved in 25 mL of methanol to obtain Co(NO 3 ) 2 ·6H 2 O solution, 4mmol 2-methylimidazole was dissolved in 25mL methanol to obtain a 2-methylimidazole solution, and under stirring conditions, the Co(NO 3 ) 2 ·6H 2 The O solution and the 2-methylimidazole solution were quickly mixed, stirred for 30 minutes, and left to stand at room temperature for 24 hours. After washing with methanol, the obtained product was vacuum-dried at 60° C. for 12 hours to obtain ZIF-67;

[0035] (2) Weigh 0.36mmol of ZIF-67 as a precursor, and ultrasonically disperse it in 25mL of absolute ethanol to obtain a uniformly dispersed ZIF-67 absolute ethanol dispersion; weigh 0.26mmol of TAA and dissolve it in 25mL of absolute ethanol, Obtain the TAA solution; under the condition of stirring, quickly add the TAA so...

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Abstract

The invention relates to a CoS / CoNi(OH)<4> porous nanocomposite used in the technical field of super capacitor electrode materials. The CoS / CoNi(OH)<4> porous nanocomposite is characterized in that ZIF-67 used as a reaction precursor is partially vulcanized by using TAA first; then, Ni(NO3)<2>.6H<2>O is added, and etching precipitation reaction is conducted between the Ni(NO<3>)<2>.6H<2>O and theremaining ZIF-67; and the finally obtained CoS / CoNi(OH)<4> porous nanocomposite is of a chip level packaged porous hollow rhombohedral dodecahedron multistage structure with the diameter between 500nmand 600nm, and the nanocomposite has a novel shape and excellent properties. A scientific, reasonable, simple, practical and low-cost preparation method which is suitable for large-scale industrial production and has a good effect is further disclosed.

Description

technical field [0001] The invention relates to the field of supercapacitor electrode material preparation, in particular to a CoS / CoNi(OH) 4 Porous nanocomposites and methods for their preparation. Background technique [0002] Energy is an important material basis for the survival and development of human beings. However, with the rapid development of the global economy, fossil energy is becoming increasingly exhausted, prompting people to turn their attention to the development and rational use of renewable clean energy. From the perspective of energy utilization, electric energy has become an indispensable source of human material production and social development. In order to effectively use electric energy, it is urgent to improve and develop new energy conversion and energy storage devices. Supercapacitor is a new type of energy storage device between traditional capacitors and rechargeable batteries. Because of its advantages such as high power density, long cycle l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/24H01G11/26H01G11/30H01G11/46H01G11/86B82Y30/00
CPCB82Y30/00H01G11/24H01G11/26H01G11/30H01G11/46H01G11/86Y02E60/13
Inventor 关晓辉黄莫寒杨柳
Owner NORTHEAST DIANLI UNIVERSITY
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