Uniformly highly dispersed hollow NiCo2S4 nanospheres anchored on carbon cloth as cathodes for high-performance hybrid supercapacitors

In this paper, we successfully anchor NiCo2S4 (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.