title: Vapor phase polymerization deposition of conducting polymer/graphene nanocomposites as high performance electrode materials.
abstract: In this paper, we report chemical vapor phase polymerization (VPP) deposition of novel poly(3,4-ethylenedioxythiophene) (PEDOT)/graphene nanocomposites as solid tantalum electrolyte capacitor cathode films. The PEDOT/graphene films were successfully prepared on porous tantalum pentoxide surface as cathode films through the VPP procedure. The results indicated that the high conductivity nature of PEDOT/graphene leads to the decrease of cathode films resistance and contact resistance between PEDOT/graphene and carbon paste. This nanocomposite cathode film based capacitor showed ultralow equivalent series resistance (ESR) ca. 12 mΩ and exhibited better capacitance-frequency performance than the PEDOT based capacitor. The leakage current investigation revealed that the device encapsulation process does not influence capacitor leakage current, indicating the excellent mechanical strength of PEDOT-graphene films. The graphene showed a distinct protection effect on the dielectric layer from possible mechanical damage. This high conductivity and mechanical strength graphene based conducting polymer nanocomposites indicated a promising application future for organic electrode materials.
authors.affiliation: State Key Laboratory of Electronic Thin Films and Integrated Devices, School of Optoelectronic Information, University of Electronic Science and Technology of China (UESTC), Chengdu, P R China.
authors.forename: Yajie
authors.initials: Y
authors.lastname: Yang
authors.forename: Shibin
authors.initials: S
authors.lastname: Li
authors.forename: Luning
authors.initials: L
authors.lastname: Zhang
authors.forename: Jianhua
authors.initials: J
authors.lastname: Xu
authors.forename: Wenyao
authors.initials: W
authors.lastname: Yang
authors.forename: Yadong
authors.initials: Y
authors.lastname: Jiang