Wh/kg for EDLCs, the LICs display 50-60 Wh/kg at high C-rates and cycle-life up to 0.5 million cycles . Nevertheless, their power density is much lower than the EDLCs and the main bottleneck is the low efficiency of battery-like electrodes or anodes. Since the second electrode in these devices is made from high surface area carbon, the rate of charge storage at this electrode is high due to the physical charging of electric double-layer (EDL).