Dissertation > Excellent graduate degree dissertation topics show

Preparation of porous titanium oxide nanotube array / polyaniline composite electrode and its application in hybrid capacitor.

Author: YangBin
Tutor: SongZuo
School: Nanjing University of Technology and Engineering
Course: Materials Science
Keywords: Electrochemical capacitor Hybrid capacitor TiO2 Polyaniline Neutralelectrolyte
CLC:
Type: Master's thesis
Year: 2014
Downloads: 19
Quote: 0
Read: Download Dissertation

Abstract


In this paper, polyaniline is in situ electrochemical polymerized in TiO2nanotube arrays prepared by anodic oxidation to prepare composite electrode of electrochemical capacitors, and tested its electrochemical properties. Matched with the electrode of tantalum electrolytic capacitor to prepare electrolytic-electrochemical hybrid capacitors, and studied the performance of the hybrid capacitor. It was found that the polyaniline/TiO2nanotube arrays composite electrode has electrochemical activity in a neutral electrolyte after treatment.A hybrid capacitor with high energy density and high working voltage, consisting of the anode electrode of tantalum electrolytic capacitor and the cathode electrode of polyaniline/TiO2nanotube arrays, was developed successfully. The PANI/TiO2nanotube arrays composite electrode as the capacitor cathode was prepared by in situ electrochemical polymerization of aniline in porous anodic titania nanotube arrays on titanium foil substrates. The composites electrode showed good rate capability with a specific capacitance of10mF·cm-2while a high power density of0.55mW·cm-2was obtained. Employing a dielectric coated anode electrode, the single-cell hybrid capacitor could withstand high working voltages as high as100V. Because the PAN1/TiO2composite cathode requires little volume due to its high specific capacitance, available space can be used to enlarge the anode electrode, leading to an increase in specific capacitance of the hybrid capacitor. The as-prepared hybrid capacitor exhibited a volumetric energy density of1.11J·cm-3and a gravimetric energy density of0.12J·g-1, which was about four times and three times higher than that of a tantalum electrolytic capacitor, respectively. Short circuit charge-discharge cycle test for the hybrid capacitor at100V demonstrated that its capacitance did not decrease and ESR did not increase after10000cycles, showing excellent cycle stability and power performance. Its peak power density of847.5W·g-1due to a short circuit discharge can be estimated. In addition, electrochemical impedance spectroscopy data indicated that the hybrid capacitor also had good impedance characteristics and frequency characteristics.The polyaniline/TiO2nanotube arrays composite electrode owns electrochemical activity and excellent cycle stability in neutral electrolyte such as PBS buffer solution and CP-120organic neutral solution after electrochemical reduction mixed treatment in NH4Cl solution. Obviously, it greatly expanded the range of applications of polyaniline. Studied the application of this composite electrode in biosensor. Found that it can sensitively detect the ascorbic acid.

Related Dissertations

  1. Studies on the Synthesis and Technology of Dipentaerythritol and Its Derivative,TQ223.164
  2. Preparation of Based on the Phenolic Resin of Activated Carbon and Adsorption-Photopcatalytical Character of Supported TiO2,TQ424.19
  3. The Preparation and Research of Magnetically Separable TiO2 Photocatalyst Nanofibers,TB383.1
  4. The Study of Preparation and Photocatalytic Activity of TiO2 by Electrospinning,O614.411
  5. The Preparation and Electrochemical Tests of Carbon Foam,O613.71
  6. The Preparation of Polyaniline-Metal Complex and the Study on Its Catalytical Property,O634
  7. Of Bi N Co-doped TiO \u003csub\u003e 2 \u003c/ sub\u003e of the preparation and performance,O614.411
  8. Preparation and Anticorrosion Properties of Doped Polyaniline/Epoxy Coating,TQ637
  9. Investigation of Fabrication, Characterization and Property of Fuctional Titanium Dioxide Nanoporous Materials,TB383.1
  10. Investigation of Preparation and Properties of Ordered Porous TiO2,TB383.2
  11. Preparation and Performance of V2O5-WO3/MOx/Cordierite Catalyst Modified with Cu、Mn、Ce for DeNOx,X701
  12. Preparation of One-dimensional Nano TiO2 and Study on the Decolorization of Dyeing Wastewater,TB383.1
  13. Preparation and Property Study of Polyaniline/Polyester Composite Conductive Fabric,TS195.6
  14. Photodegradation of Orange Ⅱ by Mesoporous TiO2,X791
  15. Research on Electrochemical Synthesis and Application of Conductive Polyaniline,O633.21
  16. Ni / TiO 2 -SiO 2 Preparation, Characterization and Hydrogenation of Maleic Anhydride,TQ225.2
  17. Polyaniline / short fiber reinforced natural rubber properties,TQ330.1
  18. Nano LaFeO 3 Controllable Synthesis and TiO 2 bridged construct composite photocatalyst,O643.36
  19. SnO 2 / CNTs composite Controllable Preparation and Gas Sensitivity Study,TB383.1
  20. Preparation of polyaniline nanostructures , characterization and biomedical applications,TB383.1
  21. Total doped TiO 2 Visible Preparation, Characterization and Properties,O643.36

CLC: >
© 2012 www.DissertationTopic.Net  Mobile