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Updated: Jan 17, 2026

Evaluating the Electrochemical Properties of Supercapacitors using the Three-Electrode System
Published on: January 7, 2022
Amorphous Hollow NiCo(OH)xSy Spheres with Improved Electrochemical Performance for Supercapacitor Applications
Xin Liu1, Fuzhi Li1, Yaqin Zhang2
1School of Materials Science and Engineering, Hunan University of Technology, Zhuzhou 412007, China.
Abstract:
Supercapacitors demonstrate substantial application prospects in the energy storage domain owing to their high power density, swift charging-discharging capabilities, and prolonged cycle life. However, their relatively low energy density constrains their further advancement. In this study, a double-ligand NiCo(OH)xSy amorphous material with a hollow bulbous morphology was effectively fabricated using a homemade self-sacrificing precursor template. Due to the distinctive amorphous structure and the OH/S dual-ligand synergistic effect, the electrode material exhibited excellent charge storage performance (1912 F g-1 at 1 A g-1 and 79.1% retention at 20 A g-1). The asymmetric supercapacitor (NiCo(OH)xSy//PC) achieves a value of 60.97 Wh kg-1 at 375 W kg-1. After 8000 charge-discharge cycles at 5 A g-1, it showed 88.5% capacity retention and 99.6% Coulombic efficiency. These outstanding electrochemical performances suggest the considerable potential of NiCo(OH)xSy in energy storage devices.
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