Articles
  • Improving rate capabilities of hybrid supercapacitor using Li4Ti5-xZrxO12/activated carbon
  • Seung-Hwan Leea, Tae-Hoon Jeoungb, Sung-Pill Namb and In-Ho Imc,*
  • a Center for Advanced Life Cycle Engineering, University of Maryland, Room 1103, Building 89, College Park, MD, USA b Advanced Power Grid Research Division, Korea Electrotechnology Research Institute c Dept. of Electrical Engineering, Shin Ansan University
Abstract
The Li4Ti5-xZrxO12 (x = 0, 0.15, 0.3, 0.45 and 0.6) anodes were prepared using a simple solid-state method. We investigated the electrochemical performance of hybrid supercapacitor using Zr4+ doped Li4Ti5O12 anode and activated carbon cathode. When Zr entered Li4Ti5O12, the higher lattice parameters and conductivities of Li4Ti5-xZrxO12 (x = 0.15, 0.3, and 0.45) obviously improved the electrochemical performance of hybrid supercapacitor. Among them, the Li4Ti4.55Zr0.45O12 anode has a superior specific capacitance of 69 Fg−1 at 0.5 Ag−1 rates. Also, the power and energy densities were 212.3W kg−1 and 65.2Wh kg−1, respectively.

Keywords: Hybrid supercapacitor, Li4Ti5O12, Zr Doping, Power and energy densities.

This Article

  • 2016; 17(3): 139-143

    Published on Mar 31, 2016