Journal of Electrochemical Science and Technology

  • 제11권1호
  • /
  • Pages.50-59
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  • 2020
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  • 2093-8551(pISSN)
  • /
  • 2288-9221(eISSN)
한국전기화학회 (The Korean Electrochemical Society)
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PEDOT:PSS Enhanced Electrochemical Capacitive Performance of Graphene-Templated δ-MnO2

  • Sinan, Neriman (Graduate School of Natural and Applied Sciences, Advanced Technologies-Materials Science and Engineering Program, Bursa Technical University) ;
  • Unur, Ece (Department of Energy Systems Engineering, Bursa Technical University)
  • 투고 : 2019.03.06
  • 심사 : 2019.08.16
  • 발행 : 2020.02.28
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초록

Birnessite-type manganese dioxide (δ-MnO2) with hierarchical micro-/mesoporosity was synthesized via sacrificial graphene template approach under mild hydrothermal conditions for the first time. Graphene template was obtained by a surfactant (cetyltrimethylammonium bromide, CTAB) assisted liquid phase exfoliation (LPE) in water. A thin PEDOT:PSS (poly (3,4-ethylene dioxythiophene): poly (styrene sulfonate)) layer was applied to improve electrical conductivity and rate capability of MnO2. The MnO2 (535 F g-1 at 1 A g-1 and 45 F g-1 at 10 A g-1) and MnO2/PEDOT:PSS nanocomposite (550 F g-1 at 1 A g-1 and 141 F g-1 at 10 A g-1) delivered electrochemical performances superior to their previously reported counterparts. An asymmetric supercapacitor, composed of MnO2/PEDOT:PSS (positive) and Fe3O4/Carbon (negative) electrodes, provided a maximum specific energy of 18 Wh kg-1 and a maximum specific power of 4.5 kW kg-1 (ΔV= 2 V, 1M Na2SO4) with 85% capacitance retention after 1000 cycles. The graphene-templated MnO2/PEDOT:PSS nanocomposite obtained by a simple and green approach promises for future energy storage applications with its remarkable capacitance, rate performance and cycling stability

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피인용 문헌

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