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Vol. 5 No. 1 (2013)

Vapor Phase Polymerization Deposition Conducting Polymer Nanocomposites on Porous Dielectric Surface as High Performance Electrode Materials

https://doi.org/10.1007/BF03353730
Yajie Yang
State Key Laboratory of Electronic Thin Films and Integrated Devices, School of Optoelectronic Information, University of Electronic Science and Technology of China (UESTEC), Chengdu 610054, China
Luning Zhang
State Key Laboratory of Electronic Thin Films and Integrated Devices, School of Optoelectronic Information, University of Electronic Science and Technology of China (UESTEC), Chengdu 610054, China
Shibin Li
State Key Laboratory of Electronic Thin Films and Integrated Devices, School of Optoelectronic Information, University of Electronic Science and Technology of China (UESTEC), Chengdu 610054, China
Zhiming Wang
State Key Laboratory of Electronic Thin Films and Integrated Devices, School of Optoelectronic Information, University of Electronic Science and Technology of China (UESTEC), Chengdu 610054, China
Jianhua Xu
State Key Laboratory of Electronic Thin Films and Integrated Devices, School of Optoelectronic Information, University of Electronic Science and Technology of China (UESTEC), Chengdu 610054, China
Wenyao Yang
State Key Laboratory of Electronic Thin Films and Integrated Devices, School of Optoelectronic Information, University of Electronic Science and Technology of China (UESTEC), Chengdu 610054, China
Yadong Jiang
State Key Laboratory of Electronic Thin Films and Integrated Devices, School of Optoelectronic Information, University of Electronic Science and Technology of China (UESTEC), Chengdu 610054, China

Corresponding Author: Shibin Li

shibinli@uestc.edu.cn

Nano-Micro Letters, Vol. 5 No. 1 (2013), Article Number: 40-46

Abstract

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. 12Ω 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.

Keywords

Vapor-phase polymerization Conducting polymers Graphene Nanocomposites Solid tantalum electrolyte capacitor
Yang, Yajie, Luning Zhang, Shibin Li, Zhiming Wang, Jianhua Xu, Wenyao Yang, and Yadong Jiang. 2013. “Vapor Phase Polymerization Deposition Conducting Polymer Nanocomposites on Porous Dielectric Surface As High Performance Electrode Materials”. Nano-Micro Letters 5 (1):40-46. https://doi.org/10.1007/BF03353730.
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