Uniformly highly dispersed hollow NiCo2S4 nanospheres anchored on carbon cloth as cathodes for high-performance hybrid supercapacitors
Wei Wang, Guohui Chen, Weiqi Kong, Junshu Chen, Qinlin Yu, Xiaoyan Sun, Linyu Pu, Huan Zhang, Jiaxu Gong, Yatang Dai
Abstract
In this paper, we successfully anchor NiCo 2 S 4 (NCS) hollow spheres (HS) on carbon cloth (CC) via an electrostatic adsorption-assisted template strategy. Synthesized NCS HS/CC composites show high conductivity and excellent cycle performance due to the synergistic effect of their structural properties. Compared to NCS HS, NCS HS/CC exhibits a high specific capacity of 724.9C/g, good rate performance (88.5 %, 20 A/g) and excellent cycle stability (91.06 %, 5000 cycles). In addition, the fabricated hybrid supercapacitor (HSC) devices have excellent energy/power density (35.44 Wh/kg, 800 W/kg) and superior cycling stability, with 97.5 % capacity retention after 5000 cycles at 10 A/g. This electrostatic adsorption-assisted hard template strategy provides a method for preparing electrode materials with unique structures and excellent performance.