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Nickel selenide/carbon nanotube composite nanometer material and preparation and application thereof

A carbon nanotube composite and nanomaterial technology, which is applied to nickel selenide/carbon nanotube composite nanomaterials and the fields of preparation and application thereof, can solve the problems of poor conductivity of selenide, difficulty in storing batteries, and the like, and achieve capacity reduction. Attenuation, increasing particle and electron conductivity, mitigating effect of volume change

Inactive Publication Date: 2017-05-24
吴中区穹窿山天仲高分子材料技术研究所
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Electrode materials for pseudocapacitor supercapacitors mainly use transition metal oxides, permetal sulfides, and conductive polymers. Metal selenides have attracted widespread attention because of their unique nanostructures and high theoretical capacitance. However, selenides have poor electrical conductivity. Applications that are difficult to apply to energy storage batteries

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  • Nickel selenide/carbon nanotube composite nanometer material and preparation and application thereof

Examples

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Effect test

Embodiment 1

[0019] A nickel selenide / carbon nanotube composite nanomaterial is a nanowire with a length of 30 nanometers, wherein nano-spherical nickel selenide with an average particle diameter of 10 nm is attached to the carbon nanotube.

[0020] The preparation method of the nickel selenide / carbon nanotube composite nanomaterial comprises the following steps:

[0021] (1) Add 1 g of carbon nanotubes into a mixed solution of 300 mL of concentrated nitric acid and concentrated sulfuric acid, heat and reflux at 120 ° C for 8 hours, then filter with microporous filter paper, and repeatedly wash until the pH is 7, and obtain activated carbon with a concentration of 5.8 mg / mL nanotube suspension;

[0022] (2) Dissolve 0.2mol sodium selenite and 0.1mol nickel chloride in 50mL water, stir well, add activated carbon nanotube suspension to the mixed solution, ultrasonically disperse for 10-20min, and then transfer to 60mL polytetrafluoroethylene In a lined stainless steel reactor, after reactin...

Embodiment 2

[0025] A nickel selenide / carbon nanotube composite nanomaterial is a nanowire with a length of 10 nanometers, wherein nano-spherical nickel selenide with an average particle diameter of 5 nm is attached to the carbon nanotube.

[0026] The preparation method of the nickel selenide / carbon nanotube composite nanomaterial comprises the following steps:

[0027] (1) Add 1 g of carbon nanotubes into a mixed solution of 300 mL of concentrated nitric acid and concentrated sulfuric acid, heat and reflux at 120°C for 12 hours, then filter with microporous filter paper, and wash repeatedly until the pH is 7 to obtain activated carbon with a concentration of 0.1 mg / mL nanotube suspension;

[0028] (2) Dissolve 0.15mol sodium selenosulfate and 0.05mol nickel perchlorate in 50mL water, stir evenly, add activated carbon nanotube suspension into the mixed solution, ultrasonically disperse for 10-20min, and then transfer to 60mL polytetrafluoroethylene In a fluorine-lined stainless steel rea...

Embodiment 3

[0031] A nickel selenide / carbon nanotube composite nanomaterial is a nanowire with a length of 50 nanometers, wherein nano-spherical nickel selenide with an average particle diameter of 20nm is attached to the carbon nanotube.

[0032] The preparation method of the nickel selenide / carbon nanotube composite nanomaterial comprises the following steps:

[0033] (1) Add 1 g of carbon nanotubes into a mixed solution of 300 mL of concentrated nitric acid and concentrated sulfuric acid, heat and reflux at 140°C for 6 hours, then filter with microporous filter paper, and wash repeatedly until the pH is 7 to obtain activated carbon nanotubes with a concentration of 20 mg / mL. tube suspension;

[0034] (2) Dissolve 0.2mol selenium dioxide and 0.1mol nickel nitrate in 50mL water, stir well, add activated carbon nanotube suspension to the mixed solution, ultrasonically disperse for 10-20min, then transfer to 60mL polytetrafluoroethylene lining In a stainless steel reaction kettle, after r...

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Abstract

The invention provides a nickel selenide / carbon nanotube composite nanometer material and a preparation and an application thereof, and relates to the technical field of nanometer materials. The nickel selenide / carbon nanotube composite nanometer material is a nanometer wire which is 10-50 nanometers long, wherein nanometer spherical nickel selenide with the average particle size being 5-20nm is attached onto carbon nanotubes. The nickel selenide / carbon nanotube composite nanometer material of uniform shape is synthesized by a hydrothermal method, and the material has a large specific surface area. The carbon nanotubes effectively alleviate the size change of nickel selenide in the process of charging and discharging, and reduce electrode capacity attenuation. Moreover, the carbon nanotubes can increase the conductivity of selenide nickel electrodes. When the prepared nickel selenide / carbon nanotube composite nanometer material is used as the negative electrode of a super capacitor, the super capacitor has high charge and discharge specific capacitance and a long cycle life. Moreover, there is a rich source of raw materials, the production cost is low and controllable, and the material is suitable for industrialized production.

Description

technical field [0001] The invention relates to the technical field of nanomaterials, in particular to a nickel selenide / carbon nanotube composite nanomaterial and its preparation and application. Background technique [0002] Supercapacitor is an energy storage device between ordinary capacitors and chemical batteries. It has the advantages of both, such as high power density, high energy density, long cycle life, fast charge and discharge, and instantaneous high current discharge. And the characteristics of no pollution to the environment. It involves multiple disciplines such as materials, energy, chemistry, and electronic devices, and has become one of the hotspots of interdisciplinary research. As a new type of energy storage device with green environmental protection and excellent performance, supercapacitors are widely used in many fields, including national defense, military industry, and civilian fields such as electric vehicles, computers, and mobile communication...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/24H01G11/30H01G11/36H01G11/86B82Y30/00B82Y40/00
CPCY02E60/13H01G11/24B82Y30/00B82Y40/00H01G11/30H01G11/36H01G11/86
Inventor 周春毅
Owner 吴中区穹窿山天仲高分子材料技术研究所
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