“…Recently the researches have been also focused on the advance of an alternate class of supercapacitors based on fast reversible Faradaic reactions. Generally, identified as "pseudocapacitors" they consist of various transition oxides [3][4][5][6][7][8][9][10][11][12][13][14][15][16], transition metal nitrides [17], and conducting polymers [18][19][20][21]. The surface functional groups changes the electrochemical performance (such as capacitance, electrical conductivity, and selfdischarge) of carbon materials in two different ways.…”