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Influence of Stirring Time on the Electrochemical Properties of NiCo 2 S 4 Hexagonal Plates and NiCo−OH Nanoparticles as High‐Performance Pseudocapacitor Electrode Materials
Author(s) -
Sajjad Muhammad,
Xu Chen,
Guan Linlin,
Zhang Shuyu,
Jiao Yangjing,
Zhang Shuangshuang,
Lin Yuting,
Ren Yang,
Zhou Xiaowei,
Liu Zhu
Publication year - 2020
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201904944
Subject(s) - pseudocapacitor , materials science , electrode , electrochemistry , supercapacitor , hexagonal crystal system , nanoparticle , capacitance , chemical engineering , horizontal scan rate , nanotechnology , current density , nanostructure , crystallography , cyclic voltammetry , chemistry , physics , quantum mechanics , engineering
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.