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Selenide @ carbon-based fiber supercapacitor electrode material and preparation method thereof

A supercapacitor, carbon-based fiber technology, applied in hybrid capacitor electrodes, nanotechnology for materials and surface science, nanotechnology, etc., can solve the problems of low specific capacitance and low energy density, and achieve improved specific capacitance and excellent performance. Mechanical properties, the effect of facilitating the transfer of charges

Active Publication Date: 2018-12-18
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention intends to compound transition metal selenides and carbon-based fibers to form composite nanofiber materials, and improve the problems of low specific capacitance and low energy density of carbon-based fibers as electrode materials

Method used

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  • Selenide @ carbon-based fiber supercapacitor electrode material and preparation method thereof
  • Selenide @ carbon-based fiber supercapacitor electrode material and preparation method thereof
  • Selenide @ carbon-based fiber supercapacitor electrode material and preparation method thereof

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Embodiment 1

[0034] The carbon-based fiber is prepared by the spinning method as the core; the corresponding selenide is grown on the carbon-based fiber by the hydrothermal method or the magnetron sputtering method as the shell, and the selenide@carbon-based fiber composite material is prepared. In this example, the inventor selected a variety of selenides to test separately, and made various selenides@carbon-based fiber composite materials. The selenides grown on carbon-based fibers include cobalt selenide, nickel selenide, selenium Any of manganese selenide, iron selenide, vanadium selenide, tin selenide, niobium selenide, titanium selenide, copper selenide. Three-electrode test, the specific capacitance of each selenide@carbon-based fiber composite is shown in Table 1. For comparison, the specific capacitance of a single carbon-based fiber is also listed in the table.

[0035]

Embodiment 2

[0037](1) Mix 1 mmol cobalt chloride hexahydrate, 1 mmol sodium selenite and 40 mL deionized water, stir for 5-15 min to form a uniform pink solution, then slowly add 5 mL hydrazine hydrate (85 % N 2 h 4 ·H 2 O) as a reducing agent, continue stirring for 5-15 minutes to obtain a precursor solution;

[0038] (2) Hang the carbon nanotube fibers in the reaction kettle, add the precursor solution, carry out the hydrothermal reaction, the reaction temperature is 120-180 ℃, the time is 12-15 h, cool to room temperature, collect the fibers, wash and dry ;

[0039] (3) In order to improve the crystallinity of cobalt selenide on the surface of the fiber, it was put into a tube furnace in an Ar atmosphere and annealed at 300-600 °C for 2 hours to obtain the cobalt selenide@carbon nanotube fiber supercapacitor electrode material .

[0040] The chemical raw materials cobalt chloride hexahydrate and sodium selenite used in the above examples are analytically pure, and the resistance o...

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Abstract

The invention discloses a selenide @ carbon-based fiber supercapacitor electrode material, which is a composite nanometer material of a core-shell structure, wherein the carbon-based fiber is taken asa core and the selenide is taken as a shell, and the selenide is grown on the surface of the carbon-based fiber. Also disclosed are a cobalt selenide @ carbon nanotube fiber composite nanomaterial and a preparation method thereof. The cobalt selenide @ carbon nanotube fiber composite nano material grows cobalt selenide material on the surface of the carbon nanotube fiber through a hydrothermal method, thereby forming the cobalt selenide @ carbon nanotube composite fiber. The synthesized selenide @ carbon-based fiber supercapacitor electrode material is tested in a three-electrode system. Theresults show that the electrode material exhibits high specific capcity of 359 Fg<-1> and good cycle stability. The invention has the advantages of simple preparation method and low cost. The preparedelectrode material of cobalt selenide @ carbon nanotube fiber supercapacitor has the advantages of large specific surface area, high specific capacitance and good cycle performance. In addition, dueto the high conductivity, strength and flexible knitting characteristics, the electrode material has great application prospects in wearable electronic equipment.

Description

technical field [0001] The invention relates to the field of supercapacitors, in particular to a preparation method of a fiber supercapacitor electrode material. Background technique [0002] With the acceleration of global industrialization, the problem of energy shortage and exhaustion has become increasingly prominent, seriously affecting the stability of long-term social development. Especially after entering the 21st century, non-renewable energy sources such as oil, natural gas, and coal are continuously consumed, and the contradiction between economic development and energy supply is becoming more and more acute. In addition, environmental problems such as the greenhouse effect caused by the burning of fossil fuels are becoming more and more serious. In order to improve The focus of the energy supply structure of human society will gradually shift to clean and environmentally friendly renewable new energy forms. Although they can alleviate problems such as energy cri...

Claims

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Application Information

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IPC IPC(8): H01G11/30H01G11/36B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00H01G11/30H01G11/36Y02E60/13
Inventor 吕建国王伟成
Owner ZHEJIANG UNIV
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