Influence of Stirring Time on the Electrochemical Properties of NiCo <sub>2</sub> S <sub>4</sub> Hexagonal Plates and NiCo−OH Nanoparticles as High‐Performance Pseudocapacitor Electrode Materials
Muhammad Sajjad, Chen Xu, Linlin Guan, Shuyu Zhang, Yangjing Jiao, Shuangshuang Zhang, Yu‐Ting Lin, Yang Ren, Xiaowei Zhou, Zhu Liu
Abstract
Abstract This study investigated the morphology dependent electrochemical behavior tuned with different stirring times (1, 5, 10, 20, 40 min, and 1 hr.) for NiCo 2 S 4 hexagonal plate (NCS hexagonal plate) and NiCo−OH nanoparticles (NiCo−OH NPs). The altered nanostructure properties are well supported by in‐depth structural and morphological analysis. When used as electrodes for supercapacitor, both NCS hexagonal plates and NiCo−OH NPs (prepared at stirring time of 20 min and 5 min, respectively) exhibit maximum specific capacitances of 833 and 733 mF cm −2 at the current density of 10 mA cm −2 along with superior rate and stable cycling performance due to their beneficial structural features. Moreover, the stability study showed 69.0 % and 67.0 % capacitance retention after 5000 cycles, indicating excellent stability of the samples. These outstanding properties manifest that the unique hierarchical structures promised as a suitable electrode material for the energy storage field shortly.