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 volume change and affect its service life; at the same time, the conductivity of polyaniline is greatly affected by different doping states.

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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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Embodiment 1

[0039] The structural schematic diagram of the integrated heteropolyacid modified polyaniline / titanium nitride core-shell nanowire array composite material according to the present invention, please refer to the appendix of the specification for details figure 1 . The integrated heteropolyacid-modified polyaniline / titanium nitride core-shell nanowire array composite material is the direct growth of titanium nitride nanowire arrays (2) on the carbon substrate (1), and the heteropolyacid-modified polyaniline composite film (3) Wrapped on the surface of titanium nitride nanowires 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.

Embodiment 2

[0041] The preparation process flow chart of the integrated heteropolyacid modified polyaniline / titanium nitride core-shell nanowire array composite material according to the present invention, see the appendix of the specification for details figure 2 , mainly including (A) preparation of titanium dioxide nanowire arrays by seed-assisted hydrothermal reaction method, (B) preparation of titanium nitride nanowire arrays by high-temperature nitriding treatment, (C) one-step electrodeposition reaction method on titanium nitride nanowire arrays Three steps for preparing heteropolyacid-modified polyaniline composite film on the array surface:

[0042] (A) Preparation of titanium dioxide nanowire array (2-1) by seed crystal assisted hydrothermal reaction method: impregnate the carbon base material (1) in an ethanol solution of tetrabutyl titanate with a concentration of 0.05-0.5mol / L, and the immersion time After 5-30min, after calcination treatment, the carbon base material with p...

Embodiment 3

[0046] The mechanism diagram of electrostatic adsorption and immobilization of phosphomolybdic acid in the integrated heteropolyacid modified polyaniline / titanium nitride core-shell nanowire array composite material of the present invention, see the appendix of the specification for details image 3 . Taking heteropolyacid immobilization by electrostatic adsorption as an example, when heteropolyacid is added during polyaniline polymerization, heteropolyanions will be immobilized in polyaniline film through electrostatic adsorption to form a uniformly dispersed composite film. First, after adding heteropolyacid to the aniline precursor solution, phosphomolybdic acid ionizes hydrogen ions and heteropolyanions in the aqueous solution, aniline hydrogen ions are protonated to make the nitrogen atoms positively charged, thereby electrostatically adsorbing negatively charged Heteropolyanions enable heteropolyacids to be evenly immobilized in the polyaniline membrane at the molecular ...

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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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