Performance of Electrochemically Synthesized Nickel-Zinc and Nickel-Iron (Ni–Zn//Ni–Fe) Nanowires as Battery Type Supercapacitor

Abstract

Herein, a high performance Ni-Fe composite nanowires array based supercapacitor anode was fabricated via electrochemical deposition using polycarbonate membrane. The synthesized nanowires demonstrate outstanding electrochemical performance with good specific capacitance of 1255.17 Fg −1 at 3 Ag −1 and 80% capacitive retention at the end of 5000 charge-discharge cycles. In addition, an asymmetrical supercapacitor (Ni-Zn//Ni-Fe) was also fabricated that demonstrates 95.23% of capacitive retention after 2000 cycles. The fabricated supercapacitor device showed energy density of 63.62 Wh kg −1 at a power density of 0.64 KW kg −1 . Further, the practical performance of a single asymmetrical supercapacitor device was demonstrated by lighting up a 2.2 V green LED. These results reveal the potential of the synthesized nanowires in potable energy storage gadgets.

Electrode Materials for Supercapacitors in Hybrid Electric Vehicles: Challenges and Current Progress

“…The excellent theoretical capacitance of nickel-based electrode materials has been gaining attention recently. Their high chemical stability, easy availability, low cost, better theoretical capacitance, and non-toxic nature make them a promising material in the application for high-performance supercapacitors [173][174][175][176]. Methods like electrodeposition, hydrothermal, solvothermal, etc.…”

Structurally Stable Ni(OH)2 Composite with Super Long‐term Cycling Life for Aqueous High‐performance Supercapacitor

“…Transition metal-based materials have shown a great promise in the development of supercapacitors, especially Ni(OH) 2 -based materials, due to their low cost and high reversible oxidation/reduction properties (theoretical specific capacitance ~3750 F g À 1 ). However, the special charge storage mechanism and incompatible interface of Ni(OH) 2 -based electrodes lead to unoptimistic cycle stability and rate performance of supercapacitors, limiting their further development [6][7][8][9][10][11]. To address these issues, various strategies such as designing composite with conductive material, introducing chemically stable substrates and constructing nanoscale materials have proven to be effective.…”

Novel Conductive Ag-Decorated NiFe Mixed Metal Telluride Hierarchical Nanorods for High-Performance Hybrid Supercapacitors

“…Fe is the most abundant element in the Earth’s crust and hence, is available at low cost . Moreover, Fe-based electrodes are environmentally safer than other transition metal-based electrodes . However, the poor conductivity of Fe is affecting the overall performance of the device and hindering its usage in SCs.…”

“…38 Moreover, Fe-based electrodes are environmentally safer than other transition metal-based electrodes. 39 However, the poor conductivity of Fe is affecting the overall performance of the device and hindering its usage in SCs. Therefore, enhancement in the conductivity by combining with conducting materials, such as Ni ultimately improves the conductivity and performance of the SC.…”