Mesoporous Ce₂Zr₂O₇/PbS Nanocomposite with an Excellent Supercapacitor Electrode Performance and Cyclic Stability

Abstract

It remains a challenge to fabricate a suitable electrode with high specific capacitance (Csp) and excellent cyclic stability that can enhance the electrochemical performance of the supercapacitor. In the present work, Ce2Zr2O7/PbS nanocomposite has been synthesized and its electrochemical properties has been evaluated for supercapacitor electrode application. The high BET surface area (46 m2/g) and small pore size (11.15 nm) enable better intercalation of electrolyte and confer better capacitive performance on the surface of the nanocomposite electrode. The nanocomposite electrode exhibits an excellent pseudocapacitive performance in 0.1 M KOH electrolyte having specific capacitance of 219 F/g at a current density of 1 A/g. Furthermore, it presents an excellent cycling stability and retains ∼100% Csp after 1000 cyclic voltammetry (CV) cycles. The better electrochemical performance and 100% retention of Csp up to 1000 cycles is attributed to the unique microstructure of nanocomposite i. e., due to the combination of the conductive nature of sulfide and stability of the oxide nanomaterials. These results suggest that Ce2Zr2O7/PbS nanocomposite can be an excellent candidate to be used as an electrode material in supercapacitor devices.

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

“…The following supporting information can be downloaded at https: //www.mdpi.com/article/10.3390/nano12050817/s1, Figure S1: The Ragone plot shows the specific energy vs. specific power for the PANI/PbS in HCl and the PANI/PbS with Na 2 SO 4 [5,23,24,26,28,87].…”

“…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 ].…”

“…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 ]. Nasreen et al developed a Ce 2 Zr 2 O 7 /PbS nanocomposite with a maximum specific capacitance of 219 F g −1 at 1 A g −1 [ 23 ]. Using a one-step method, Yuming et al developed a fractal fern-like PbS architecture and obtained a high specific capacitance of 498 F g −1 [ 24 ].…”

MOF‐Derived Ni(OH)2 Nanocubes/GO For High‐Performance Supercapacitor

“…In order to solve the above problems, a large number of researchers have focused on introducing electricity‐conducting materials, such as transition metal sulfide, conductive polymer, metal and carbon . Among them, carbon‐based composite materials as electrode materials for supercapacitors are a promising topic.…”