Journal of Electrochemical Science and Technology

  • 제3권2호
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  • Pages.72-79
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  • 2012
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  • 2093-8551(pISSN)
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  • 2288-9221(eISSN)
한국전기화학회 (The Korean Electrochemical Society)
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Synthesis and Performance of Li2MnSiO4 as an Electrode Material for Hybrid Supercapacitor Applications

  • Karthikeyan, K. (Faculty of Applied Chemical Engineering, Chonnam National University) ;
  • Amaresh, S. (Faculty of Applied Chemical Engineering, Chonnam National University) ;
  • Son, J.N. (Faculty of Applied Chemical Engineering, Chonnam National University) ;
  • Lee, Y.S. (Faculty of Applied Chemical Engineering, Chonnam National University)
  • 투고 : 2012.05.10
  • 심사 : 2012.06.08
  • 발행 : 2012.06.30
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초록

$Li_2MnSiO_4$ was synthesized using the solid-state method under an Ar atmosphere at three different calcination temperatures (900, 950, and $1000^{\circ}C$). The optimization of the carbon coating was also carried out using various molar concentrations of adipic acid as the carbon source. The XRD pattern confirmed that the resulting $Li_2MnSiO_4$ particles exhibited an orthorhombic structure with a $Pmn2_1$ space group. Cyclic voltammetry was utilized to investigate the capacitive behavior of $Li_2MnSiO_4$ along with activated carbon (AC) in a hybrid supercapacitor with a two-electrode cell configuration. The $Li_2MnSiO_4$/AC cell exhibited a high discharge capacitance and energy density of $43.2Fg^{-1}$ and $54Whkg^{-1}$, respectively, at $1.0mAcm^{-2}$. The $Li_2MnSiO_4$/AC hybrid supercapacitor exhibited an excellent cycling stability over 1000 measured cycles with coulombic efficiency over > 99 %. Electrochemical impedance spectroscopy was conducted to corroborate the results that were obtained and described.

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피인용 문헌

  1. High-energy X-ray powder diffraction and atomic-pair distribution-function studies of charged/discharged structures in carbon-hybridized Li2MnSiO4 nanoparticles as a cathode material for lithium-ion batteries vol.263, 2014, https://doi.org/10.1016/j.jpowsour.2014.03.065