One-step synthesis of Co9S8/NiS composite with enhanced charge storage performance for supercapacitors application

• Published in: Ionics 2021, Vol.27 (7), p.3143-3152
• Main Authors: Yan, Liqing, Shen, Hailong, Yan, Faxin, Han, Yu, Huang, Haifu, Wei, Geng, Liang, Xianqing, Zhou, Wenzheng, Guo, Jin
• Format: Article
• Language: English
• Subjects: Charge materials; Chemistry; Chemistry and Materials Science; Coated electrodes; Cobalt sulfide; Condensed Matter Physics; Electrochemistry; Electrode materials; Energy Storage; Metal foams; Nickel sulfide; Optical and Electronic Materials; Original Paper; Renewable and Green Energy; Supercapacitors
• ISSN: 0947-7047; 1862-0760
• DOI: 10.1007/s11581-021-04072-3

In this work, a Co 9 S 8 /NiS composite is successfully electrodeposited on Ni foam using a cyclic voltammetry method. This method is one of several effective strategies for the in-situ growth of self-supporting arrays for electrode material, which facilitates the effective combination of Co 9 S 8 and NiS coated on the skeleton of Ni foam without any binder. The presence of wrinkle stripes on the surface of Co 9 S 8 /NiS composite provides abundant active sites. As expected, the Co 9 S 8 /NiS composite exhibits a high capacitance (2288 F g −1 and 2.52 F cm −2 at 1.0 A g −1 ). Furthermore, Co 9 S 8 -NiS/NF//N-rGO/NF HSCs device delivers a maximum specific energy of 47.41 Wh kg −1 at the specific power of 400 W kg −1 . This work demonstrates the great potential of the Co 9 S 8 /NiS composite in supercapacitors and provides an effective reference scheme for the preparing the metal sulfide materials with enhanced charge storage performance.