Polyaniline/graphene oxide nanofiber composite material, and preparation method and application of composite material

A nanofiber and composite material technology, applied in the direction of hybrid capacitor electrodes, etc., can solve the problems of low specific capacitance and poor electrochemical cycle stability, and achieve the effects of high specific capacitance, simple preparation process, and excellent electrochemical cycle stability.

Inactive Publication Date: 2019-07-26
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Aiming at the problems of low specific capacitance and poor electrochemical cycle stability in current polyaniline, the present invention provides a polyaniline / graphene oxide nanofiber composite material and a preparation method thereof

Method used

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  • Polyaniline/graphene oxide nanofiber composite material, and preparation method and application of composite material
  • Polyaniline/graphene oxide nanofiber composite material, and preparation method and application of composite material
  • Polyaniline/graphene oxide nanofiber composite material, and preparation method and application of composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] (1) Add 0.15 g GONF to 150 mL deionized water and sonicate for 45 min at room temperature to prepare a dispersion of GONF. Add 8 g of cobalt chloride to the above dispersion, and mechanically stir for 90 min at room temperature. The product was washed repeatedly with deionized water until the filtrate was colorless, and then freeze-dried at -50 °C for 48 h to prepare Co 2+ -GONF.

[0019] (2) Add 0.15 g Co 2+ -GONF was added to 250 mL of 1 mol / L hydrochloric acid aqueous solution, and sonicated for 45 min at room temperature to prepare Co 2+ - Dispersion of GONF. Add 2.5 g of aniline to the above dispersion, stir magnetically at room temperature for 45 min to prepare mixed solution I; add 7 g APS to 35 mL of 1 mol / L hydrochloric acid aqueous solution, and stir magnetically at room temperature for 15 min to prepare mixed solution II ; Add the mixed solution II to the mixed solution I drop by drop at a rate of 15 drops / min, and react with magnetic stirring at 2 °C for...

Embodiment 2

[0023] (1) Add 0.1 g GONF to 100 mL deionized water and sonicate for 30 min at room temperature to prepare GONF dispersion. Add 3 g of cobalt chloride to the above dispersion, and stir mechanically at room temperature for 60 min. The product was washed repeatedly with deionized water until the filtrate was colorless, and then freeze-dried at -50 °C for 48 h to prepare Co 2+ -GONF.

[0024] (2) Add 0.1 g Co 2+ -GONF was added to 150 mL of 1 mol / L hydrochloric acid aqueous solution, and sonicated for 30 min at room temperature to prepare Co 2+- Dispersion of GONF. Add 1 g of aniline to the above dispersion and stir magnetically for 30 min at room temperature to prepare mixed solution I; add 2 g APS to 20 mL of 1 mol / L hydrochloric acid aqueous solution and stir magnetically for 5 min at room temperature to prepare mixed solution II ; Add the mixed solution II to the mixed solution I dropwise at a rate of 10 drops / min, and react with magnetic stirring at 0 °C for 24 h. h, pr...

Embodiment 3

[0026] (1) Add 0.2 g GONF to 200 mL deionized water and sonicate for 60 min at room temperature to prepare GONF dispersion. Add 12 g of cobalt chloride to the above dispersion, and stir mechanically at room temperature for 120 min. The product was washed repeatedly with deionized water until the filtrate was colorless, and then freeze-dried at -50 °C for 48 h to prepare Co 2+ -GONF.

[0027] (2) Add 0.2 g Co 2+ -GONF was added to 300 mL of 1 mol / L hydrochloric acid aqueous solution, and sonicated at room temperature for 60 min to prepare Co 2+ - Dispersion of GONF. Add 4 g of aniline to the above dispersion, stir magnetically at room temperature for 60 min to prepare mixed solution I; add 12 g APS to 50 mL of 1 mol / L hydrochloric acid aqueous solution, and stir magnetically at room temperature for 20 min to prepare mixed solution II ; Add the mixed solution II to the mixed solution I drop by drop at a rate of 20 drops / min, and react with magnetic stirring at 5 °C for 12 h,...

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Abstract

The invention discloses a polyaniline / graphene oxide nanofiber composite material and a preparation method thereof, and belongs to the technical field of preparation of electrode materials for supercapacitors. The composite material is characterized in that the composite material is prepared by taking phenylamine as a monomer, taking a graphene oxide nanofiber as a support framework, taking ammonium persulfate as an oxidant, utilizing a chemical oxypolymerization reaction, and guiding the phenylamine monomer via a cobalt ion to perform polymerization on the graphene oxide nanofiber. The composite material prepared by the method has high specific capacitance and excellent electrochemical cycling stability, is simple in preparation technology, is mainly used for preparing an electrode of a supercapacitor, and has significant economic values and social benefits.

Description

technical field [0001] The invention belongs to the technical field of preparation of electrode materials for supercapacitors, and in particular relates to a polyaniline / graphene oxide nanofiber composite material and a preparation method and application thereof. Background technique [0002] Polyaniline is an important electrode material for supercapacitors, which has the advantages of non-toxicity, simple synthesis, low cost, and excellent chemical stability. However, the specific capacitance of polyaniline is low, and in the process of charging and discharging, the repeated intercalation and extraction of dopant ions cause the repeated expansion and contraction of the structure of polyaniline, which causes the structure of polyaniline to collapse microscopically, resulting in the The specific capacitance decays rapidly, and the electrochemical cycle stability is poor. Li Zixuan (Li Zixuan; Preparation and electrochemical performance of graphene / polyaniline / cobalt tetroxi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/30H01G11/36H01G11/40H01G11/48H01G11/24C08G73/02
CPCC08G73/0266H01G11/24H01G11/30H01G11/36H01G11/40H01G11/48Y02E60/13
Inventor 李宝铭王婷玉周逸凡
Owner FUZHOU UNIV
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