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Hollow-structure carbon-coated tin dioxide nanofiber material as well as preparation method and application of hollow-structure carbon-coated tin dioxide nanofiber material

A technology of tin dioxide and nanofibers, which is applied in the manufacture of hollow filaments, fiber treatment, fiber chemical characteristics, etc., can solve problems such as unsatisfactory methods, and achieve ease of dissolution, wide application prospects, and improved conductivity. Effect

Inactive Publication Date: 2015-03-25
DALIAN JIAOTONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Domestic scholars have invented a preparation method of carbon-coated vanadate composite fiber for lithium-ion battery anode materials by using electrospinning method. The application number is 201110189371.5, and the publication number is Chinese patent "CN 102280625A". However, the above methods are not ideal. Therefore, the development of an effective method to prepare electrode materials with a new structure of carbon uniformly coated with metal oxides is of great significance for improving the performance and application of supercapacitors.

Method used

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  • Hollow-structure carbon-coated tin dioxide nanofiber material as well as preparation method and application of hollow-structure carbon-coated tin dioxide nanofiber material
  • Hollow-structure carbon-coated tin dioxide nanofiber material as well as preparation method and application of hollow-structure carbon-coated tin dioxide nanofiber material
  • Hollow-structure carbon-coated tin dioxide nanofiber material as well as preparation method and application of hollow-structure carbon-coated tin dioxide nanofiber material

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Experimental program
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Effect test

Embodiment 1

[0031] (A) Preparation of hollow carbon-coated tin dioxide nanofibers

[0032] (1) Dissolve 3.1g of PAN in 20ml of DMF and stir until completely dissolved as the outer layer fluid; put 3.42g of PMMA in a mixed solution of 7ml of DMF and 3ml of THF and stir until completely dissolved, then add 1.5g of Sn(OH) to it 4 , stirred evenly, as the inner layer fluid;

[0033] (2) Mix the prepared PAN solution with PMMA / Sn(OH) 4The solution was input into the outer tube and inner tube of the coaxial electrospinning nozzle at the flow rate of 0.7ml / h and 0.4ml / h respectively, and coaxial electrospinning was carried out. The spinning voltage was 15kV and the relative humidity was 40%. The spun The fiber is received by aluminum foil paper, the receiving distance is 15cm, and the PAN / [PMMA+Sn(OH) 4 ] core-shell nanocomposite fibers;

[0034] (3) Place the core-shell nanocomposite fiber obtained in (2) in an oven at 90° C. for 2 hours to dry until the volatile organic solvents in the core...

Embodiment 2

[0040] (A) Preparation of hollow carbon-coated tin dioxide nanofibers

[0041] (1) Dissolve 3.1g PAN in 20ml DMF and stir until completely dissolved as the outer layer fluid; put 3.42g PMMA in a mixed solution of 5ml DMF and 5mlTHF and stir until completely dissolved, then add 1.5g SnCl to it 4 , stirred evenly, as the inner layer fluid;

[0042] (2) Mix the prepared PAN solution with PMMA / SnCl 4 The solution was input into the outer tube and inner tube of the coaxial electrospinning nozzle at the flow rate of 0.6ml / h and 0.3ml / h respectively, and coaxial electrospinning was carried out. The spinning voltage was 15kV and the relative humidity was 40%. The spun The fiber is received by aluminum foil paper, the receiving distance is 15cm, and the PAN / [PMMA+SnCl 4 ] core-shell nanocomposite fibers;

[0043] (3) Place the core-shell nanocomposite fibers obtained in (2) in an oven at 90° C. for 2 hours, until the volatile organic solvents in the core and shell are completely vol...

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Abstract

The invention discloses a hollow-structure carbon-coated tin dioxide nanofiber material, a preparation method and application of the hollow-structure carbon-coated tin dioxide nanofiber material in a super capacitor. The preparation method of the hollow-structure carbon-coated tin dioxide nanofiber material comprises the following steps: by taking polyacrylonitrile as an outer flow, dissolving tin metal salt or alkali in polymethyl methacrylate as an inner flow, carrying out pre-oxidization and carbonization by using a coaxial electrostatic spinning method to obtain the hollow-structure carbon-coated tin dioxide nanofiber; the outer diameter is 800-1000nm, the inner diameter is 500-700nm, a shell layer is a fiber layer with tin dioxide particles which have particle diameters being 3-15nm and are uniformly coated with carbon. The fiber material is prepared into a working electrode of the super capacitor, has high specific capacity and excellent cyclic stability, and is the electrode material of the super capacitor with excellent performance.

Description

technical field [0001] The invention relates to a carbon-coated tin dioxide nanofiber material with a hollow structure, a preparation method thereof and an application in a supercapacitor, belonging to the field of electrode materials. Background technique [0002] With the increasing demand for energy, the development of green and environmentally friendly new energy sources and more advanced energy storage devices is becoming more and more important. Supercapacitor is a new type of energy storage element between traditional capacitors and batteries, which has broad application prospects and great economic value. Electrode materials are the key factors that determine the performance of supercapacitors. At present, carbon materials, metal oxides, conductive polymers, and composite electrode materials have been studied more. Carbon materials have the advantages of high specific surface area, low cost, and long cycle life, and are used in electrochemical double-layer capacitor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F8/08D01F8/10D01F1/10D01F1/08D01D5/00D01D5/34H01G11/86H01G11/46H01G11/36
CPCY02E60/13
Inventor 吴艳波韩笑梅毕军张月宋铁犇
Owner DALIAN JIAOTONG UNIVERSITY
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