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Polypyrrole-titanium dioxide or titanium nitride-polyaniline coaxial three-layer nanotube array composite material, and preparation method and application thereof

A technology of polypyrrole nanotubes and nanotube arrays, which is applied in the fields of nanotechnology, nanotechnology, hybrid/electric double layer capacitor manufacturing, etc. Small area and other problems, to achieve the effect of high specific capacitance value, good cycle stability, and enhanced cycle life

Active Publication Date: 2014-10-22
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For example, the liquid-liquid interface formed by polyaniline and polypyrrole monomers is used to prepare polyaniline and polypyrrole composite membranes by electrochemical polymerization, but the polymer membranes obtained by this preparation method are usually disordered in structure and have a small contact area with the electrolyte. Small, not conducive to the full use of the properties of the two conductive polymers

Method used

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  • Polypyrrole-titanium dioxide or titanium nitride-polyaniline coaxial three-layer nanotube array composite material, and preparation method and application thereof
  • Polypyrrole-titanium dioxide or titanium nitride-polyaniline coaxial three-layer nanotube array composite material, and preparation method and application thereof
  • Polypyrrole-titanium dioxide or titanium nitride-polyaniline coaxial three-layer nanotube array composite material, and preparation method and application thereof

Examples

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Effect test

Embodiment 1

[0042] (1) Preparation of titanium dioxide and titanium nitride nanotube array skeleton materials: the titanium sheet was ultrasonically cleaned in ethanol, acetone, and deionized water for 30 minutes, and then polished in hydrogen fluoride / nitric acid / water solution with a volume ratio of 1:4:5 Treatment; in the two-electrode electrochemical reaction system, the titanium sheet is used as the anode, the platinum sheet is used as the cathode, and the ammonium fluoride of 0.2mol / L, the phosphoric acid of 0.5mol / L, the volume fraction 5% methanol and the volume fraction 40% ethylene di The aqueous solution of alcohol is the reaction electrolyte solution, using the anodic oxidation method, under the condition of constant voltage 30V, 25 ℃ constant temperature reaction for 2h, then fully rinsed with deionized water and then dried naturally to obtain a titanium dioxide nanometer with independent tube walls and open tube openings. tube array. High-temperature calcination treatment of...

Embodiment 2

[0062] The preparation method of the polypyrrole-titanium dioxide-polyaniline composite material is prepared by a step-by-step selective synthesis reaction method of chemical polymerization reaction, electrochemical polymerization reaction and photo-assisted electrochemical polymerization reaction, including the following steps:

[0063] (1) Preparation of titanium dioxide nanotube arrays: The titanium sheet was ultrasonically cleaned in ethanol, acetone, and deionized water for 30 minutes, and then polished in hydrogen fluoride / nitric acid / water solution with a volume ratio of 1:4:5; using constant potential Anodic oxidation synthesis method, in the two-electrode chemical reaction system, the titanium sheet is used as the anode and as the working electrode, the platinum sheet is used as the cathode and as the auxiliary counter electrode, with 0.25mol / L ammonium fluoride, 0.4mol / L phosphoric acid, volume An aqueous solution with a fraction of 5% methanol and a volume fraction o...

Embodiment 3

[0069] The preparation method of the polypyrrole-titanium dioxide-polyaniline composite material is prepared by a step-by-step selective synthesis reaction method of chemical polymerization reaction, electrochemical polymerization reaction and photo-assisted electrochemical polymerization reaction, including the following steps:

[0070] (1) Preparation of titanium dioxide nanotube arrays: The titanium sheet was ultrasonically cleaned in ethanol, acetone, and deionized water for 30 minutes, and then polished in hydrogen fluoride / nitric acid / water solution with a volume ratio of 1:4:5; using constant potential Anodic oxidation synthesis method, in the two-electrode chemical reaction system, the titanium sheet is used as the anode and the working electrode, the platinum sheet is used as the cathode and as the auxiliary counter electrode, with 0.15mol / L ammonium fluoride, 0.5mol / L phosphoric acid, volume An aqueous solution with a fraction of 6% methanol and a volume fraction of 4...

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Abstract

The invention provides a coaxial three-layer nanotube array composite material. The coaxial three-layer nanotube array composite material comprises a titanium dioxide or titanium nitride nanotube array frame, a polypyrrole nanotube formed through polymeric deposition at the outer wall surface of the frame, and a polyaniline nanotube formed through polymeric deposition at the inner wall surface of the frame. The invention also provides a preparation method of the coaxial three-layer nanotube array composite material and an electrochemical energy storage application of the coaxial three-layer nanotube array composite material. The composite material is prepared by taking a titanium dioxide or titanium nitride nanotube as the frame, the frame is of a hollow structure, has uniform tube spacing and can absorb volume contraction and expansion caused when a conductive polymer is charged and discharged, and the circulating life of an electrode material is prolonged; the multi-gap hollow tubular structure enables polyaniline and polypyrrole to be fully contacted with a doping agent electrolyte, such that ion diffusion and charge transfer are facilitated; and the composite material comprises P-type doped characteristic polypyrrole and n-type doped characteristic polypyrrole at the same time and fully utilizes anions and cations in a solution so as to obtain a super capacitor electrode material with high specific capacitance and good circulating stability.

Description

technical field [0001] The invention belongs to the field of electrochemical materials, and relates to a coaxial three-layer nanotube array composite material, in particular to a coaxial three-layer nanotube array structure of polypyrrole-titanium dioxide-polyaniline or polypyrrole-titanium nitride-poly Aniline composite material, more specifically, is a kind of orderly assembly composed of titanium dioxide or titanium nitride nanotube skeleton, n-type doped conductive polymer polypyrrole nanotube, p-type doped conductive polymer polyaniline nanotube The coaxial three-layer nanotube composite material also relates to a preparation method of the coaxial three-layer nanotube array composite material and its application in the field of electrochemical energy storage. Background technique [0002] A supercapacitor is a new type of energy storage device whose performance is between that of a dielectric capacitor and a battery. The device has the advantages of fast charge and disc...

Claims

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Application Information

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IPC IPC(8): H01G11/30H01G11/48H01G11/24H01G11/86B82Y30/00
CPCY02E60/13
Inventor 谢一兵王丹
Owner SOUTHEAST UNIV
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