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A Porous and Interconnected Polypyrrole Film with High Conductivity and Ion Accessibility as Electrode for Flexible All‐Solid‐State Supercapacitors
Author(s) -
Mao Jingwen,
Liu Congcong,
Cheng Chi,
Zhang Weimin,
Liao XiaoZhen,
Wang Jiulin,
Li Linsen,
Yang Xiaowei,
He YuShi,
Ma ZiFeng
Publication year - 2019
Publication title -
chemelectrochem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.182
H-Index - 59
ISSN - 2196-0216
DOI - 10.1002/celc.201901514
Subject(s) - polypyrrole , supercapacitor , materials science , electrode , capacitance , nanoporous , conductive polymer , conductivity , polymerization , electrochemistry , nanotechnology , porosity , electrical conductor , polymer , chemical engineering , composite material , optoelectronics , chemistry , engineering
Nanoporous electrodes with high electrical conductivity and good mechanical properties are attractive for high‐performance flexible supercapacitors. In this work, we report a flexible polypyrrole (PPy) film electrode synthesized by a modified versatile vapor‐phase polymerization (VPP) strategy. Differing from conventional VPP protocols that are likely to form smooth polymer films, it could easily engineer the PPy film with porous and interconnected structure by simply optimizing the concentration of oxidant and the polymerization time. The film electrode showed an exceptionally high electrical conductivity up to 94 S cm −1 . The unique porous PPy films constructed by interconnected electronic/ionic conductive networks achieved a specific capacitance of 494 F g −1 (corresponding to 836 mF cm −2 ) at a current density of 1 A g −1 . The fabricated all‐solid‐state supercapacitor device with the PPy electrodes exhibited a specific capacitance of 300 F g −1 at 1 A g −1 and a high energy density of 26.67 kW kg −1 . The high electrochemical performance and outstanding mechanical properties present the film electrode promising potential for flexible energy devices in various applications.