Dice-Like Nanostructure of a CuS@PbS Composite for High-Performance Supercapacitor Electrode Applications

Abstract

Abstract:A cost-effective and uniform crystal with different structures was fabricated using a facile chemical bath deposition technique for electrochemical supercapacitor (SC) applications. In this study, CuS, PbS, and CuS@PbS composite electrodes were fabricated for SCs. The morphology and structure of the electrodes were analyzed by field emission-scanning electron microscopy, transmission electron microscopy, X-ray diffraction, and X-ray photoelectron spectroscopy. The CuS@PbS composite electrode delivered outstanding electrochemical performance in SCs with a high specific capacitance of 1004.42 F g −1 at a current density of 2.85 A g −1 , good cycling stability (only 2.9% loss after 3000 cycles at 2.85 A g −1 ), higher energy density of 33.89 Wh kg −1 at a power density of 714.28 W kg −1 , and an excellent rate capability compared to other electrodes. These results show that the CuS@PbS composite can be used to improve the surface morphology and is a promising positive electrode material for SC applications.

Facile Fabrication of Polyaniline/Pbs Nanocomposite for High-Performance Supercapacitor Application

“…It can be used in many applications, such as solar cells, catalysts, sensors, and photodetectors. Few studies have recently investigated how combining PbS with other active materials increases PbS’s energy storage performance [ 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 ]. For example, Cheol-Hwan Mun et al synthesized a NiS-PbS composite that exhibits a higher specific capacity of 125.89 mA h g −1 at a current density of 2 A g −1 [ 22 ].…”

Facile Synthesis of Coral Reef-Like ZnO/CoS2 Nanostructure on Nickel Foam as an Advanced Electrode Material for High-Performance Supercapacitors

“…Table 1 compares the performance of the ZnO/CoS 2 /NF nanocomposite with electrodes from the recent literature [10,20,[31][32][33][34][35][36][37]. As shown in Figure 5f, the synthesized electroactive materials resulted in the impedance of ZnO/CoS 2 /NF nanocomposite being more aligned vertically in the low-frequency area compared with ZnO/NF.…”

“…The electrolyte employed was a 3 M KOH homogeneous solution. Cyclic voltammetry measurements were performed at various scan rates (10,20,30,40,50,60,70,80,90, and 100 mV•s −1 ) in a potential range between −0.5 and 0.6 V. Equation (1) from galvanostatic charge-discharge analysis was used to calibrate the specific capacity of the synthesized nanocomposite, where C S is the specific capacity in C•g −1 , I denotes the discharge current in A, ∆t is the discharge time difference in s, and m denotes the mass of the electroactive material in g.…”

“…SCs can be classified as follows on the basis of the storage process: pseudocapacitors (faradaic charge transfer) and electrochemical double-layer capacitors (EDLCs) (nonfaradaic charge transfer, e.g., graphene, CNTS, and AC) [8][9][10][11][12]. Carbon-derived materials generally suffer from drawbacks such as long ion diffusion length, unregulated pore shape, and dimensions limiting the accumulation of charge in the EDLC, leading to lower storage values.…”

“…The electrolyte ions facilitating the electrode also aid in enhancing the performance of the electroactive material. Low charge transfer and excellent conductivity are the two main reasons for the improved capacity values of CoS 2[30].Table1compares the performance of the ZnO/CoS 2 /NF nanocomposite with electrodes from the recent literature[10,20,[31][32][33][34][35][36][37]. As shown in Figure5f, the synthesized electroactive materials resulted in the impedance of ZnO/CoS 2 /NF nanocomposite being more aligned vertically in the low-frequency area compared with ZnO/NF.…”