Perovskite rare earth porous hollow microspheres of SmFeO3/MWCNT battery type asymmetric hybrid supercapacitors
M. Isacfranklin, R. Yuvakkumar, G. Ravi, M. Thambidurai, Hung D. Nguyen, Dhayalan Velauthapillai
Abstract
The rapid advancements made by science and technology in the present world are astonishing and have a way of stimulating our imagination. Modern research centres on search for unique cathode electrodes to improve energy density in hybrid supercapacitors (HSCs). A battery-type perovskite rare earth-based SmFeO 3 /MWCNT electrode is being investigated as cathode electrode for future-generation energy storage devices. Herein, perovskite rare earth-based metal oxides and its carbon composites (SmFeO 3 , SmFeO 3 /GC,SmFeO 3 /MWCNT) are flourishingly synthesized via one-step solvothermal technique as cathode materials for hybrid supercapacitors . The asymmetric solid-state supercapacitor SmFeO 3 /MWCNT//CNT device is constructed with an excellent 216.68 F/g specific capacitance, 67.71 Wh/kg energy and 749.97 W/kg power density at 1 A/g current density . An improved cycling performance of 79.83% capacity retention and 99.84% coulombic efficiency after 20000 long-cycles is reported. This work revealed that SmFeO 3 /MWCNT//CNT AHSSCs offer boundless ability as good electrode for practical energy storage applications.