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Preparation method of NiCo<2>S<4>/carbon nanotube composite electrode material

A carbon nanotube composite and carbon nanotube technology, which is applied in the field of composite materials, can solve unseen problems and achieve high specific capacitance value, good electrochemical performance stability, and strong binding force

Inactive Publication Date: 2015-11-04
CHINA JILIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] NiCo 2 S 4 Combinations with carbon materials such as graphene, graphite oxide, carbon fiber, and carbon cloth have been reported in the field of supercapacitors, but NiCo 2 S 4 A report on the application of composite electrode materials with carbon nanotubes in the field of supercapacitors

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  • Preparation method of NiCo&lt;2&gt;S&lt;4&gt;/carbon nanotube composite electrode material
  • Preparation method of NiCo&lt;2&gt;S&lt;4&gt;/carbon nanotube composite electrode material
  • Preparation method of NiCo&lt;2&gt;S&lt;4&gt;/carbon nanotube composite electrode material

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specific Embodiment approach 1

[0017] Specific implementation mode one: a kind of NiCo 2 S 4 The preparation method of the carbon nanotube composite electrode material is specifically completed according to the following steps.

[0018] 1. Preparation of carbon nanotube / nickel foam matrix: First, cut the nickel foam that has been ultrasonically cleaned with dilute hydrochloric acid, acetone, and absolute ethanol to 1*2cm; weigh 50mg of carbon nanotubes and 4.5mg of 60wt% polytetrafluoroethylene Dissolve it in 10ml of absolute ethanol and stir it into a slurry, then evenly coat it on the surface of 1*2cm nickel foam, and dry it in vacuum at 80°C to obtain a carbon nanotube / nickel foam matrix; the mass of carbon nanotubes loaded on the nickel foam 2mg / cm 3 .

[0019] 2. Preparation of electrodeposition solution: mix 1mmol Ni(NO 3 ) 2 ·6H 2 O and 2mmol Co(NO 3 ) 2 ·6H 2 O was dissolved in 100ml distilled water to prepare Ni 2+ / Co 2+ A mixed metal solution with a molar ratio of 1:2 was added, and 30...

specific Embodiment approach 2

[0021] Specific embodiment two: a kind of NiCo 2 S 4 The preparation method of the carbon nanotube composite electrode material is specifically completed according to the following steps.

[0022] 1. Preparation of carbon nanotube / nickel foam matrix: First, cut the nickel foam that has been ultrasonically cleaned with dilute hydrochloric acid, acetone, and absolute ethanol to 1*2cm; weigh 50mg of carbon nanotubes and 4.5mg of 60wt% polytetrafluoroethylene Dissolve it in 10ml of absolute ethanol and stir it into a slurry, then evenly coat it on the surface of 1*2cm nickel foam, and dry it in vacuum at 80°C to obtain a carbon nanotube / nickel foam matrix; the mass of carbon nanotubes loaded on the nickel foam 4mg / cm 3 .

[0023] 2. Preparation of electrodeposition solution: mix 2mmol Ni(NO 3 ) 2 ·6H 2 O and 4mmol Co(NO 3 ) 2 ·6H 2 O was dissolved in 100ml distilled water to prepare Ni 2+ / Co 2+ 100 mmol of thioacetamide was added to the mixed metal solution with a mola...

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Abstract

The invention provides a preparation method of NiCo<2>S<4> / carbon nanotube composite electrode material and relates to a preparation method for compounding carbon nanotube / foamed nickel with NiCo<2>S<4> nano-particles through electrochemical deposition. The preparation method comprises: a first step of preparing a carbon nanotube / foamed nickel substrate: evenly stirring carbon nanotubes, 60wt% of polytetrafluoroethylene and ethyl alcohol according to a certain ratio, applying the mixture to the surface of foamed nickel, and performing vacuum drying at the temperature of 80 DEG to obtain the carbon nanotube / foamed nickel substrate; a second step of preparing an electro-deposition liquid: dissolving Ni(NO<3>)<2>.6H<2>O, Co(NO<3>)<2>.6H<2>O and thioacetamide in distilled water according to a ratio, and evenly stirring the mixture to obtain the electro-deposition liquid; and a third step of, by taking the carbon nanotube / foamed nickel substrate as a working electrode, a platinum electrode as a counter electrode, and a saturated calomel electrode as a reference electrode, performing electrochemical deposition in the electro-deposition liquid through cyclic voltammetry to obtain the NiCo<2>S<4> / carbon nano tube composite electrode material. The composite electrode material NiCo<2>S<4> obtained by the method of the invention has a large binding force with the carbon nanotubes, and has relative high specific capacitance and excellent electrochemical performance stability while being used as the electrode of a supercapacitor.

Description

technical field [0001] The invention relates to the field of composite materials, in particular to a NiCo 2 S 4 A preparation method of electrochemical deposition composite of nanoparticles on carbon nanotubes / nickel foam. Background technique [0002] In recent years, supercapacitors have attracted extensive attention due to their many advantages such as high power density, short charging time, and long cycle life. Electrode material is a key factor affecting the performance of supercapacitors, with RuO 2 Such noble metal oxides have large specific capacitance due to their pseudocapacitive principle, but their high price and toxicity limit their commercial applications. Some cheap metal sulfides instead of noble metals as supercapacitor electrode materials have become a research hotspot. NiCo 2 S 4 It is a typical spinel structure composite metal sulfide with Co 3+ / Co 2+ and Ni 3+ / Ni 2+ The redox pair can obtain a higher working voltage window and specific capac...

Claims

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Application Information

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IPC IPC(8): H01G11/86H01G11/30H01G11/36
CPCY02E60/13
Inventor 徐靖才王攀峰王新庆彭晓领洪波金顶峰金红晓李静
Owner CHINA JILIANG UNIV
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