Integrated heteropolyacid modified polyaniline/titanium nitride core-shell nanowire array composite material and its preparation method and application

A technology of titanium nitride core-shell nanometer and titanium nitride nanometer, which is applied in the field of new materials and new energy, can solve the problems of large volume change, great influence of polyaniline conductivity, and influence on service life, etc., and achieve high specific capacitance, high The effect of practical value and industrial production potential

Active Publication Date: 2018-05-04
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, polyaniline achieves electrochemical energy storage through the insertion/extraction of ions, so it will produce a large volum

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  • Integrated heteropolyacid modified polyaniline/titanium nitride core-shell nanowire array composite material and its preparation method and application
  • Integrated heteropolyacid modified polyaniline/titanium nitride core-shell nanowire array composite material and its preparation method and application
  • Integrated heteropolyacid modified polyaniline/titanium nitride core-shell nanowire array composite material and its preparation method and application

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Example Embodiment

[0038] Example 1

[0039] The structural schematic diagram of the integrated heteropolyacid modified polyaniline / titanium nitride core-shell nanowire array composite material of the present invention is shown in the description attached figure 1 . The integrated heteropoly acid modified polyaniline / titanium nitride core-shell nanowire array composite material is the direct growth of titanium nitride nanowire array (2) on a carbon substrate (1), and the heteropoly acid modified polyaniline composite film (3) Wrapped on the surface of the titanium nitride nanowire to form a coaxial heterogeneous core-shell structure. The titanium nitride nanowire has a length of 0.8-1.3 μm and a diameter of 50-100 nm. The thickness of the heteropolyacid modified polyaniline composite film (3) is 20-200nm.

Example Embodiment

[0040] Example 2

[0041] The preparation process flow chart of the integrated heteropoly acid modified polyaniline / titanium nitride core-shell nanowire array composite material of the present invention, please refer to the instructions attached figure 2 , Mainly including (A) seed-assisted hydrothermal reaction method to prepare titanium dioxide nanowire arrays, (B) high-temperature nitriding method to prepare titanium nitride nanowire arrays, (C) one-step electrodeposition reaction method in titanium nitride nanowire arrays Three steps of preparing heteropolyacid modified polyaniline composite film on the surface of the array:

[0042] (A) Preparation of titanium dioxide nanowire array by seed-assisted hydrothermal reaction method (2-1): The carbon substrate material (1) is immersed in an ethanol solution of tetrabutyl titanate with a concentration of 0.05-0.5 mol / L for immersion time It is 5-30min. After calcination treatment, the carbon substrate material that physically adsor...

Example Embodiment

[0045] Example 3

[0046] The electrostatic adsorption and immobilization mechanism diagram of phosphomolybdic acid in the integrated heteropolyacid modified polyaniline / titanium nitride core-shell nanowire array composite material of the present invention is shown in the appendix of the specification image 3 . Taking the electrostatic adsorption and solid-supporting heteropoly acid as an example, the heteropoly acid is added in the polymerization process of polyaniline, and the heteropolyanion will be immobilized on the polyaniline membrane by electrostatic adsorption to form a uniformly dispersed composite membrane. First, after adding heteropoly acid to the aniline precursor solution, phosphomolybdic acid ionizes hydrogen ions and heteropoly anions in the aqueous solution. The aniline hydrogen ion is protonated to make the nitrogen atom positively charged, thereby electrostatically adsorbing the negatively charged Heteropolyanions make the heteropolyacids uniformly immobilize...

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Abstract

The invention discloses an integrated heteropolyacid-modified polyaniline/titanium nitride core-shell nanowire array composite material and a preparation method and an application thereof. The material comprises a carbon substrate (1), titanium nitride nanowire arrays (2) and a heteropolyacid-modified polyaniline composite film (3), wherein the titanium nitride nanowire arrays (2) directly grow on the carbon substrate (1) and are uniformly and vertically arranged on the surface of the carbon substrate; the heteropolyacid-modified polyaniline composite film (3) completely coats the surfaces of the titanium nitride nanowire arrays (2); and a heteropolyacid in the heteropolyacid-modified polyaniline composite film (3) is uniformly embedded into polyaniline to form a composite film layer. The invention further provides a detailed preparation method of the integrated heteropolyacid-modified polyaniline/titanium nitride core-shell nanowire array composite material and an application of the integrated heteropolyacid-modified polyaniline/titanium nitride core-shell nanowire array composite material in the field of electrochemical energy storage. Compared with the prior art, the composite material has the advantages that the heteropolyacid is immobilized by using the polyaniline, so that the problem that the heteropolyacid is easily dissolved into a water solution and cannot be easily used for an electrode material is effectively solved; and meanwhile, the capacity property of the polyaniline is improved.

Description

technical field [0001] The invention relates to an integrated heteropolyacid-modified polyaniline / titanium nitride core-shell nanowire array composite material, a preparation method thereof, and an application of supercapacitor electrochemical energy storage, belonging to the field of new materials and new energy sources. Background technique [0002] With the progress of human society, while achieving economic benefits, it is gradually facing many problems such as serious environmental pollution and exhaustion of chemical energy. Green and environmentally friendly new energy has gradually entered people's lives, among which wind power generation, photovoltaic power generation, and green and environmentally friendly electric vehicles have become social hot issues. At the same time, how to convert, store and utilize energy has become a new technical problem. Supercapacitors have attracted much attention because of their fast charging and discharging speed, high efficiency, l...

Claims

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Application Information

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IPC IPC(8): H01G11/24H01G11/30H01G11/32H01G11/48H01G11/86
CPCY02E60/13
Inventor 谢一兵路露
Owner SOUTHEAST UNIV
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