Optimizing Performance in Supercapacitors through Surface Decoration of Bismuth Nanosheets

• DOI: 10.1021/acsami.3c17699
• Publication Date: 2024-03-20T15:01:24Z
• Authors: Yiyu Zhu; Zhen Wang; Xinyuan Zhu; Ziyu Feng; Chaoyang Tang; Qian Wang; Ying Yang; Lei Wang; Lele Fan; Jiwei Hou
• Keywords: Bismuth; Chemical bath deposition; Deposition; Specific surface area

Bismuth (Bi) exhibits a high theoretical capacity, excellent electrical conductivity properties, and remarkable interlayer spacing, making it an ideal electrode material for supercapacitors. However, during the charge discharge processes, Bi is prone to volume expansion pulverization, resulting in decline capacitance. Deposition of nonmetal on its surface considered effective way modulate morphology electronic structure. Herein, we employed chemical vapor deposition technique fabricate Se-decorated nanosheets nickel foam (NF) substrate. Various characterizations indicated that Se regulated their state, while sustaining pristine phase Electrochemical tests demonstrated exhibited 51.1% improvement capacity compared with (1313 F/g 869 at current density 5 A/g). The energy active assembled asymmetric supercapacitor could reach 151.2 Wh/kg power 800 W/kg. These findings suggest decoration promising strategy enhance nanosheets.