Vapor phase polymerization deposition conducting polymer nanocomposites on porous dielectric surface as high performance electrode materials

被引：0

作者：

机构：

[1] State Key Laboratory of Electronic Thin Films and Integrated Devices, School of Optoelectronic Information, University of Electronic Science and Technology of China (UESTEC)

来源：

Li, S. (shibinli@uestc.edu.cn) | 1600年 / Shanghai Jiaotong University卷 / 05期

基金：

中国国家自然科学基金;

关键词：

Conducting polymers; Graphene; Nanocomposites; Solid tantalum electrolyte capacitor; Vapor-phase polymerization;

D O I：

10.3786/nml.v5i1.p40-46

中图分类号：

学科分类号：

摘要：

We report chemical vapor phase polymerization (VPP) deposition of poly(3,4-ethylenedioxythiophene) (PEDOT) and PEDOT/graphene on porous dielectric tantalum pentoxide (Ta2O5) surface as cathode films for solid tantalum electrolyte capacitors. The modified oxidant/oxidant-graphene films were first deposited on Ta2O5 by dip-coating, and VPP process was subsequently utilized to transfer oxidant/oxidant-graphene into PEDOT/PEDOT-graphene films. The SEM images showed PEDOT/PEDOT-graphene films was successfully constructed on porous Ta2O5 surface through VPP deposition, and a solid tantalum electrolyte capacitor with conducting polymer-graphene nano-composites as cathode films was constructed. The high conductivity nature of PEDOT-graphene leads to resistance decrease of cathode films and lower contact resistance between PEDOT/graphene and carbon paste. This nano-composite cathode films based capacitor showed ultralow equivalent series resistance (ESR) ca. 12 mΩ and exhibited excellent capacitance-frequency performance, which can keep 82% of initial capacitance at 500 KHz. The investigation on leakage current revealed that the device encapsulation process has no influence on capacitor leakage current, indicating the excellent mechanical strength of PEDOT/PEDOT-gaphene films. This high conductivity and mechanical strength of graphene-based polymer films shows promising future for electrode materials such as capacitors, organic solar cells and electrochemical energy storage devices.

引用

页码：40 / 46

页数：6

共 21 条

[1]

Heeger A.J., Semiconducting and Metallic Polymers: The Fourth Generation of Polymeric Materials (Nobel Lecture), Angew. Chem. Int. Ed., 40, 14, (2001)

[2]

Tanriverdi E.E., Uzumcu A.T., Kavas H., Demir A., Baykal A., Conductivity Study of Polyaniline-Cobalt Ferrite (PANI-CoFe2O4) Nanocomposite, Nano-Micro Lett., 3, 2, pp. 99-107, (2011)

[3]

Guenes S., Neugebauer H., Sariciftci N.S., Con-jugated Polymer-Based Organic Solar Cells, Chem. Rev., 107, 4, pp. 1324-1338, (2007)

[4]

Chronakis I.S., Grapenson S., Jakob A., Conductive Polypyrrole Nanofibers via Electrospin-ning: Electrical and Morphological Properties, Poly-mer, 47, 5, pp. 1597-1603, (2006)

[5]

Khomenko V., Frackowiak E., Beguin F.F., Determination of the Specific Capacitance of Con-ducting Polymer/nanotubes Composite Electrodes Us-ing Different Cell Configurations, Electrochim. Acta, 50, 12, pp. 2499-2506, (2005)

[6]

Graeme A., Snook P.K., Adam S.B., Conducting-polymer-based Supercapacitor Devices and Electrodes, J. Power Sources, 196, 1, pp. 1-12, (2011)

[7]

Gerhard H.W., Friedrich J., Poly(alkylenedioxythiophene)s-New, Very Sta-ble Conducting Polymers, Adv. Mater., 4, 2, pp. 116-118, (1992)

[8]

Kudoh Y., Akami K., Matsuya Y., Solid Electrolytic Capacitor with Highly Stable Conduct-ing Polymer as a Counter Electrode, Synth. Met., 102, 1, pp. 973-974, (1999)

[9]

Ci L., Suhr J., Pushparaj V., Zhang X., Ajayan P.M., Continuous Carbon Nanotube Reinforced Composites, Nano Lett., 8, 12, pp. 2762-2766, (2008)

[10]

Kelly T.L., Yano K., Wolf M.O., Supercapaci-tive Properties of PEDOT and Carbon Colloidal Mi-crospheres, ACS Appl. Mater. Interfaces, 1, 11, pp. 2536-2543, (2009)

← 1 2 3 →