Cu-Ag/carbon nanometer fiber composite material and preparation method and application thereof

A carbon nanofiber and composite material technology, applied in the field of carbon fiber, can solve the problems of low specific capacitance and poor cycle performance, and achieve the effects of large specific capacitance, improved conductivity, and optimized process reaction conditions

Active Publication Date: 2019-08-02
JIANGSU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to solve the technical problems of low specific capacitance and poor cycle performance when carbon nanofibers are used as carbon-based electrodes, a Cu-Ag / carbon nanofiber composite material and its preparation method and application are provided

Method used

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  • Cu-Ag/carbon nanometer fiber composite material and preparation method and application thereof
  • Cu-Ag/carbon nanometer fiber composite material and preparation method and application thereof
  • Cu-Ag/carbon nanometer fiber composite material and preparation method and application thereof

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Embodiment 1

[0032] The preparation method of Cu-Ag / carbon nanofiber composite material comprises the following steps:

[0033] (1) Preparation of spinning solution: Weigh 1.102g of polyacrylonitrile and dissolve it in 12mL of N,N-dimethylformamide solvent, stir well to obtain solution A; weigh 1.332g of copper acetate and pour it into solution A , stirred at room temperature for 3 hours to obtain a mixed solution B; weighed 1.331 g of silver acetate and poured it into the mixed solution B, and stirred at room temperature for 2 hours to obtain a mixed solution C;

[0034] (2) Preparation of the precursor: place the mixed solution C in the syringe, and perform electrospinning at a voltage of 15kV, a flow rate of 1mL / h and a height of 15cm. After the electrospinning is completed, dry at room temperature overnight. Precursor Cu-Ag / PAN nanofibers were prepared;

[0035] (3) Preparation of Cu-Ag / carbon nanofiber composite material: the precursor obtained in step (2) was placed in a porcelain b...

Embodiment 2

[0043] The preparation method of Cu-Ag / carbon nanofiber composite material comprises the following steps:

[0044] (1) Preparation of spinning solution: Weigh 0.302g of polyacrylonitrile and dissolve it in 12mL of N,N-dimethylformamide solvent, stir well to obtain solution A; weigh 1.331g of copper acetate and pour it into solution A , stirred at room temperature for 3 hours to obtain a mixed solution B; weighed 1.332 g of silver acetate and poured it into the mixed solution B, stirred at room temperature for 2 hours to obtain a mixed solution C;

[0045] (2) Preparation of the precursor: place the mixed solution C in the syringe, and perform electrospinning at a voltage of 15kV, a flow rate of 1mL / h and a height of 20cm. After the electrospinning is completed, dry at room temperature overnight. Prepare Cu-Ag / PAN nanofibers;

[0046] (3) Preparation of Cu-Ag / carbon nanofiber composite material: the nanofibers obtained in step (2) are placed in a porcelain boat, 2 Under the c...

Embodiment 3

[0050] The preparation method of Cu-Ag / carbon nanofiber composite material comprises the following steps:

[0051] (1) Preparation of spinning solution: Weigh 0.801g of polyacrylonitrile and dissolve it in 12mL of N,N-dimethylformamide solvent, stir well to obtain solution A; weigh 1.332g of copper acetate and pour it into solution A , stirred at room temperature for 3 hours to obtain a mixed solution B; weighed 1.335 g of silver acetate and poured it into the mixed solution B, and stirred at room temperature for 3.5 hours to obtain a mixed solution C;

[0052] (2) Preparation of the precursor: place the mixed solution C in the syringe, and perform electrospinning at a voltage of 20kV, a flow rate of 0.8mL / h and a height of 10cm, and dry overnight at room temperature after electrospinning , making Cu / PAN nanofibers;

[0053] (3) Preparation of Cu-Ag / carbon nanofiber composite material: place the nanofiber obtained in step (2) in a porcelain boat, and heat it from room tempera...

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Abstract

The invention relates to a Cu-Ag / carbon nanometer fiber composite material prepared by a static spinning method and then charing. The Cu-AG / CNF composite material prepared by the method is higher in specific surface area and conductivity, due to the higher specific surface area, more active sites can be generated so that electrons or ions are easier to migrate, when the material serves as an anodematerial of a super capacity, the electrode material is high in specific capacitance and circulation performance, long in service life and low in pollution, Cu and Ag loaded on the carbon fibers canhelp improve the electrode conductivity to certain extent, the coulombic efficiency is improved, and finally the circulating performance of the electrode is improved; and the technical reaction condition is optimized, a synthesis technology is simplified greatly and the cost is reduced.

Description

technical field [0001] The invention relates to the field of carbon fibers, in particular to a Cu-Ag / carbon nanofiber composite material and its preparation method and application. Background technique [0002] Carbon-based materials have been widely used in various forms of supercapacitor electrode materials, although carbon-based electrodes have excellent cycle stability, long life and high power density, compared with metal oxides, the specific capacitance of carbon-based electrodes is usually Although the application of metal oxides on supercapacitor electrodes has certain advantages, especially its high theoretical specific capacitance, there are still some shortcomings, such as low conductivity and volume changes during charging and discharging. The deficiency usually leads to poor rate performance and long-term stability of the electrode, which limits its practical application in supercapacitors; therefore, combining carbon-based materials with metal particles to form...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/24H01G11/30H01G11/36H01G11/86
CPCH01G11/24H01G11/30H01G11/36H01G11/86Y02E60/13
Inventor 苏蕾张春勇江霖程洁红邓煜雨黄琳娜刘凤洁舒莉秦恒飞朱炳龙
Owner JIANGSU UNIV OF TECH
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