標題: Electrochemical Properties of CNT/MnO2 Hybrid Nanostructure with Low-Temperature Hydrothermal Synthesis as High-Performance Supercapacitor
作者: Li, Wei-Shuo
Chang, Man-Lin
Chuang, Kai-Chi
Li, Yi-Shao
Luo, Jun-Dao
Cheng, Huang-Chung
電子工程學系及電子研究所
Department of Electronics Engineering and Institute of Electronics
公開日期: 25-六月-2019
摘要: Multi-walled carbon nanotubes (CNTs)/manganese dioxide (MnO2) nanocomposites were fabricated using the low-temperature hydrothermal method with no oxidant addition as hybrid supercapacitors. The electrochemical behaviors of CNTs-MnO2 were systematically investigated by cyclic voltammetry, galvanostatic charge-discharge and electrochemical impedance spectroscopy. The specific capacitance was promoted from 30.3 F g(-1) to 405.15 F g(-1) with a hydrothermal reaction time of 5 min. Compared to pristine CNTs, the improvement ratio of the specific capacitance of a hydrothermal reaction time of 5 min was 13.4 times under the condition of a 1 M Na2SO4 electrolyte at a scan rate of 100 mVs(-1). The CNTs-MnO2 electrode also demonstrated better cycling stability after 1000 cycles. Moreover, this study demonstrates that CNTs-MnO2 electrodes have a low-temperature facile synthesis, high specific capacitance, and good cycle stability. Thus, these good supercapacitors electrodes are promising for the development in energy-storage devices in the future. (c) 2019 The Electrochemical Society.
URI: http://dx.doi.org/10.1149/2.1551910jes
http://hdl.handle.net/11536/152219
ISSN: 0013-4651
DOI: 10.1149/2.1551910jes
期刊: JOURNAL OF THE ELECTROCHEMICAL SOCIETY
Volume: 166
Issue: 10
起始頁: 0
結束頁: 0
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