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Manufacturing method of aluminum sulfide cobalt-graphene oxide composite flexible carbon nanofiber

A graphene composite, carbon nanofiber technology, applied in the manufacture of hybrid/electric double-layer capacitors, hybrid capacitor electrodes, etc., can solve the problems of restricting the application of multi-element transition metal sulfides, poor electrical conductivity, poor electrical conductivity, etc., and achieve positive electrode. The effect of good material properties, wide operating voltage, good electrochemical performance

Inactive Publication Date: 2019-12-13
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Binary metal oxides have high theoretical specific capacitance, but poor electrical conductivity limits the application of the material
Among them, multi-element transition metal sulfides have high theoretical specific capacitance and excellent electrochemical performance, but poor electrical conductivity also restricts the further application of multi-element transition metal sulfides.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The preparation method of aluminum cobalt sulfide-graphene oxide composite carbon flexible nanofiber:

[0023] (1) Add 0.85g of polyacrylonitrile and 0.15g of urea into 9g of N,N-dimethylformamide solvent, stir at 25°C for 12h to obtain a spinning dope, and spin for 6h (specific spinning parameters: use an inner diameter of The metal needle of 0.8mm is used as the nozzle, the spinning voltage is 20KV, the vertical distance from the needle to the receiving screen is 20cm, the spinning temperature is 25°C, and the relative humidity of the air is 20RH%. Acrylonitrile nanofiber membrane: put the polyacrylonitrile nanofiber membrane into an oven, raise the temperature to 250°C at a rate of 1°C / min in an air atmosphere, keep it warm for 1h, and perform pre-oxidation treatment.

[0024] (2) Add liquid sulfur into the evaporator through a sulfur pump, evaporate and gasify to obtain sulfur vapor, and at the same time add hydrogen into the evaporator through a hydrogen compressor...

Embodiment 2

[0028] The preparation method of aluminum cobalt sulfide-graphene oxide composite carbon flexible nanofiber:

[0029] (1) Add 0.90g of polyacrylonitrile and 0.10g of urea into 9g of N,N-dimethylformamide solvent, stir at 20°C for 14h to obtain spinning dope, and spin for 7h (specific spinning parameters: use an inner diameter of The metal needle of 0.8mm is used as the nozzle, the spinning voltage is 20KV, the vertical distance from the needle to the receiving screen is 20cm, the spinning temperature is 25°C, and the relative humidity of the air is 20RH%. Acrylonitrile nanofiber membrane: put the polyacrylonitrile nanofiber membrane in an oven, raise the temperature to 250°C at a rate of 2°C / min in an air atmosphere, keep it warm for 1.5h, and perform pre-oxidation treatment.

[0030] (2) Add liquid sulfur to the evaporator through a sulfur pump, evaporate and gasify to obtain sulfur vapor, and at the same time add hydrogen to the evaporator through a hydrogen compressor, full...

Embodiment 3

[0034] The preparation method of aluminum cobalt sulfide-graphene oxide composite carbon flexible nanofiber:

[0035] (1) Add 0.70g of polyacrylonitrile and 0.30g of urea into 9g of N,N-dimethylformamide solvent, stir at 30°C for 16h to obtain the spinning dope, and spin for 5h (specific spinning parameters: use an inner diameter of The metal needle of 0.8mm is used as the nozzle, the spinning voltage is 20KV, the vertical distance from the needle to the receiving screen is 20cm, the spinning temperature is 25°C, and the relative humidity of the air is 20RH%. Acrylonitrile nanofiber membrane: put the polyacrylonitrile nanofiber membrane into an oven, raise the temperature to 275°C at a rate of 1.5°C / min in an air atmosphere, keep it warm for 2 hours, and perform pre-oxidation treatment.

[0036](2) Add liquid sulfur into the evaporator through a sulfur pump, evaporate and gasify to obtain sulfur vapor, and at the same time add hydrogen into the evaporator through a hydrogen co...

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Abstract

The invention relates to the metal sulfide-carbon material technology field and discloses a manufacturing method of an aluminum sulfide cobalt-graphene oxide composite flexible carbon nanofiber. The method comprises the following steps of 1) pre-oxidizing a carbon nanofiber film by using a polyacrylonitrile nanofiber film obtained by electrostatic spinning; 2) taking the carbon nanofiber film as acarrier, and growing hydroxide precursors of Co and Al on the carbon nanofiber film through a hydrothermal method; 3) carrying out heat treatment in a hydrogen sulfide atmosphere to vulcanize the hydroxide precursors of Co and Al to obtain a CoAl2S4 hollow tube, and 4) depositing a metal compound on the surface of the CoAl2S4 hollow tube. The aluminum sulfide cobalt-graphene oxide composite flexible carbon nanofiber manufactured by the method of the invention has good performance when being used as a composite film positive electrode material of a supercapacitor; and an asymmetric water system supercapacitor assembled based on a positive electrode material and an activated carbon load carbon fiber negative electrode material can show good electrochemical performance and a wider operatingvoltage.

Description

technical field [0001] The invention relates to the technical field of metal sulfide-carbon materials, in particular to a method for preparing aluminum cobalt sulfide-graphene oxide composite flexible carbon nanofibers. Background technique [0002] Carbon nanofibers refer to carbon fibers with nanoscale. According to their structural characteristics, they can be divided into carbon nanotubes, namely hollow carbon nanofibers and solid carbon nanofibers. They are quasi-one-dimensional carbon materials between carbon nanotubes and ordinary carbon fibers. With a high degree of crystal orientation, good electrical and thermal conductivity, carbon nanofibers have low density, high specific modulus, high specific strength, high electrical conductivity, thermal stability and other characteristics of ordinary carbon fibers grown by chemical vapor deposition. , also has the advantages of small number of defects, large aspect ratio, large specific surface area, and compact structure. ...

Claims

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Application Information

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IPC IPC(8): H01G11/40H01G11/30H01G11/26H01G11/86
CPCH01G11/26H01G11/30H01G11/40H01G11/86Y02E60/13
Inventor 万军民韩益辉陈斌杰周艳王秉彭志勤
Owner ZHEJIANG SCI-TECH UNIV