Journal
ELECTROCHIMICA ACTA
Volume 106, Issue -, Pages 135-142Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2013.05.058
Keywords
Electrochemical capacitors; Poly(3,4-ethylenedioxythiophene); Manganese oxide; Multiwall carbon nanotubes; Pseudocapacitance
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Funding
- Energy Efficiency & Resources of the Korea Institute of Energy Technology Evaluation and Planning (KETEP)
- Korea government Ministry of Knowledge Economy [20122010100090, 20122010100140]
- Korea Evaluation Institute of Industrial Technology (KEIT) [20122010100090] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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The effect of the presence of poly(3,4-ethylenedioxythiophene) (PEDOT) on the pseudocapacitive properties of manganese oxide (MnO2) is investigated using PEDOT/MnO2/multiwall carbon nanotube-based (MWNT) coaxial composites containing different PEDOT contents. To prepare these PEDOT/MnO2/MWNT coaxial composites, a nanometer-thick outer layer of PEDOT was electrochemically polymerized onto the MnO2/MWNT composite, without affecting the morphology of MnO2. The pseudocapacitive properties of the MnO2/MWNT and PEDOT/MnO2/MWNT composites were evaluated by cyclic voltammetry. By analysis of the voltammetric charge, the outermost PEDOT layer on the MnO2/MWNT composite was found to improve the rate capability mainly through acting as an electrically conductive layer, rather the specific capacitance of the MnO2/MWNT composite. (c) 2013 Elsevier Ltd. All rights reserved.
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