High Performance All-solid Supercapacitors Based on the Network of Ultralong Manganese dioxide/Polyaniline Coaxial Nanowires

• DOI: 10.1038/srep17858
• Publication Date: 2015-12-08T10:34:08Z
• Authors: Junli Zhou; Lin Yu; Wei Liu; Xiaodan Zhang; Wei Mu; Xu Du; Zhe Zhang; Yulin Deng
• Keywords: Coaxial

Abstract In recent years, thin, lightweight and flexible solid supercapacitors are of considerable interest as energy storage devices. Here we demonstrated all-solid (SSCs) with high electrochemical properties, low self-discharge characteristics based on manganese dioxide/polyaniline (MNW/PANI) coaxial nanowire networks. The synergistic effect MnO 2 /PANI plus the unique nanostructure ultralong nanowires a highly interconnected network effectively enhance conductivity capacitive performance SSCs device. MNW/PANI composite 62.5% exhibits an outstanding areal specific capacitance reaching 346 mF/cm at 5 mV s −1 which is significant higher than most previously reported (15.3 –109 ) close to that best graphene films state (372 ). contrast, only 190 was obtained for pure NW network. also exhibited leakage current small 20.1 μA, have great potential practical applications.