Exploration of a Bimetallic NiSe₂@CoSe₂ Nanosphere as a Proficient Electrode for Electrochemical Activity

Abstract

According to a resourceful survey, bimetallic selenides with their hierarchical nanostructures have gained widespread attention despite their enhanced electrical conductivity. Consequently, the incorporated morphology, structure, and constituent modulation of the foremost electrode endows it with a privileged trial for the transportation and diffusion of ions. The structural and morphological study agrees with the configuration of mono- and bimetallic selenides analytically. Herein, cobalt (Co) ions in their composite heterostructures find a fundamental role in the configuration of the nanostructure having fine conducting nature. Therefore, a nanosphere is merged arbitrarily to form a conductive network, which might ease charge transfer. Furthermore, the heterostructured NiSe2@CoSe2 electrode displayed an improved specific capacitance of 531 F g–1 at a current density of 1 A g–1, and an outstanding long-term durability of 99.88% was achieved over 5000 charge–discharge cycles. The nanostructure morphology and structure of the fabricated electrode predominantly stimulate its application in energy-related attributes because of large active sites, improved surface-to-volume ratio, and limited transport length of the ions. In addition, an assembled full cell NiSe2@CoSe2//AC with a paramount operating voltage of 1.5 V using 1 M KOH achieved an increased energy density of 41 Wh kg–1 at a power density of 738 W kg–1 with a retention of 99.86% over 5000 cycles. The highly assembled asymmetric device lights up a blue light-emitting diode (LED), demonstrating a voltage of 1.63 V. The existing protocol entails an excellent reference for various metal selenides for efficient storage appliances.

Designing of the CoFeX (X= Se, P, S) Flower-like Structures on Nickel Foam as Efficient Positive Electrodes for a High-Performance Hybrid Supercapacitor

“…By utilizing their desirable SC and vast voltage range (1.6 V), an energy density as high as 61.40, 52.18, and 45.46 W h/kg for the CoFe 2 Se 4 @NiF//AC@NiF, CoFeP@NiF//AC@NiF, and CoFeS 2 @NiF//AC@NiF devices, respectively, can be attained. However, upon power density increments to 15,999.6, 16,001.48, and 15,991.3 W/kg at 20 A/g for CoFe 2 Se 4 @NiF//AC@NiF, CoFeP@NiF//AC@NiF, and CoFeS 2 @NiF//AC@NiF devices, respectively, these devices still present high energy densities of 44.33, 34.67, and 27.34 W h/kg, which greatly overtake those of other hybrid supercapacitors reported. ,,− …”

Heterostructures by Templated Synthesis of Layered Double Hydroxide to Modulate the Electronic Structure of Nickel Sites for a Highly Efficient Oxygen Evolution Reaction

“…The peaks located around 601cm −1 and 470 cm −1 are attributed to the stretching vibration of Ni–OH and metal‐Se coordination bond, respectively. [ 17 ] Figure a,b show typical N 2 adsorption‐desorption isotherms and pore‐size distribution curves for NiFe‐LDH and (Co, Ni)Se 4 @NiFe‐LDH, respectively. Both isotherms show typical H3‐type hysteresis loops, indicating the presence of mesopores.…”

Exploring the potential of CuCoFeTe@CuCoTe yolk-shelled microrods in supercapacitor applications

“…6e, the values of energy densities of the AC||CCFT-CCTYSMR are better than several devices. [67][68][69][70][71][72][73] The cycling durability and CE of our device were evaluated through repeated charging and discharging at 25 A g −1 . From Fig.…”