The facile conversion of iron foam into copper-coated 3D porous cobalt ferrite/iron foam for high-performance asymmetric hybrid supercapacitor

Exploring the Potential of Cobalt ferrites in the Supercapacitors Applications

“…This supercapacitor revealed outstanding capacitance and coulombic efficiency [35]. Halder et al studied NiCoFe2O4based devices for supercapacitor application with potential window -1 V to 0 V. In this device, NiCoFe2O4 is used as the electrode for positive terminal, and graphene is used as the electrode for negative terminal, which showed a high capacitive value of 169.5 Fg -1 at 1 Ag -1 current density and cycling stability of 100% after 1000 cycles, which indicated suitable material for supercapacitor applications [36].…”

The synthesis of Ni/Mn hexacyanoferrate microcubes and nanorods for high‐performance asymmetric supercapacitor in neutral electrolyte

“…The enhanced performance of asymmetric supercapacitors is due to the combination of intercalation/deintercalation occurring at the battery-type electrode and the electrostatic absorption/ desorption occurring at the capacitive-type electrode, which enlarges the operating voltage window and subsequently increases the energy density of the device. 10 Because of the rich valence states of transition metals (TM), the oxides, [4][5][6][9][10][11] sulfides, [12][13][14][15][16] hydroxides [17][18][19][20][21][22][23][24][25][26] of transition metals, and their numerous composites have been widely investigated as the supercapacitor electrode materials of faradic supercapacitor. Recently, the application of transition metal hexacyanoferrates (TM-HCFs) as the electroactive materials of supercapacitor has also been investigated by many researchers due to their excellent redox reversibility, high ionic conductivity, superior environmental benignancy, low cost, and insolubility upon oxidation/reduction.…”

“…Because of the rich valence states of transition metals (TM), the oxides, 4‐6,9‐11 sulfides, 12‐16 hydroxides 17‐26 of transition metals, and their numerous composites have been widely investigated as the supercapacitor electrode materials of faradic supercapacitor. Recently, the application of transition metal hexacyanoferrates (TM‐HCFs) as the electroactive materials of supercapacitor has also been investigated by many researchers due to their excellent redox reversibility, high ionic conductivity, superior environmental benignancy, low cost, and insolubility upon oxidation/reduction 27‐52 .…”

“…4 Even though the supercapacitors have high power density, their practical use is seriously limited due to their poor energy density. 5 The working potential window of the supercapacitor device must be increased to improve the energy density of the supercapacitors, because energy density is 0.5 CV 2 (where C is the specific capacitance, and V is the operating voltage window) which suggests that the operating voltage window is directly proportional to the energy density of the supercapacitor device. 6 The employment of the organic electrolyte instead of aqueous electrolyte could effectively increase the operating voltage window.…”