Simple electrodeposition of manganese dioxide onto sliver nanoparticles/carbon nanotubes carbon fibers and their application in electrochemical capacitors

• Main Authors: Yu-Che Liu, 劉宇哲
• Other Authors: Kuan-Jiuh Lin
• Format: Others
• Language: zh-TW
• Published: 2017
• Online Access: http://ndltd.ncl.edu.tw/handle/11681581668123093826

碩士 === 國立中興大學 === 化學系所 === 105 === In this work, normal commercial 3K carbon fiber cloth was chosen as the substrate for the subsequent electrodeposition of MnO2 onto it and further applied in the application of flexible supercapacitors. Surface defect modification and subsequently decoration of silver nanoparticles/multi-wall carbon nanotube nanocomposites (Ag/CNT) onto it were been carried out for the modification of the carbon fiber clothes for enhancing the attached capability between substrates and MnO2 materials. In this work, a 3D honeycomb porous MnO2 networks constructed from interconnected MnO2 nanosheets deposited onto Ag/CNT coated texiles (denoted as MnO2-Ag/CNT-CFC*) by a “dipping and drying” process and subsequent electrodeposition was reported. The capacitive performances of the prepared MnO2-Ag/CNT-CFC* was studied by cyclic voltammetry (CV) and galvanostatic charge/discharge measurements in a neutral 0.5 M Na2SO4 aqueous electrolyte. With such porous MnO2 networks and good conductivity of Ag NPs, good specific capacity of 385 F/g at 1A/g and excellent specific capacitance retention of approximately 80% after 5000 cycles at 10 A/g could be performed. These impressive results suggest that this nanocomposite is a promising candidate for use in high performance flexible energy storage applications and will be benefit for building a novel energy storage system.