Investigation of electrochemical performance of gadolinium trichloride in asymmetric supercapacitor applications

The commercial Gadolinium tri chloride (GdCl3) electrode material exhibits high specific capacitance of 207.52Fg−1 in three electrode system at 1A/g with potential window 1.0 V. The GdCl3//Activated carbon (AC) asymmetric supercapacitor device in two electrode system achieves 188.14Fg−1 specific capacitance at 1 A/g with high potential window 1.7V. It possess high energy density 75.51Wh/kg, power density 850W/kg. and electrochemical stability of 92% of its initial capacitance after 5000 cycles. These demonstrate GdCl3 as an useful material for electrochemical energy storage devices. Further, electron paramagnetic resonance study on GdCl3 reveals g-factor 1.98 and line width ΔH = 221.8mT.