Scalable in-situ formation of amorphous NiCoSx nanosheets on porous carbon-based nanofibers for asymmetric supercapacitors

The delicate integration of carbonaceous scaffolds and transition metal sulfides (TMSs) has recently achieved a series positive results in supercapacitors. However, these hybrids usually suffer from weak compatibility combination at the heterogeneous interface, leading to peeling TMSs capacity fading electrodes during long-term charge/discharge processes. Herein, facile scalable in-situ sulfidation technique is designed for construction stable supercapacitor electrodes, where porous NiCo/C nanofibers act as core support shell materials amorphous NiCoSx nanosheets, with formation well-defined NiCo/C@NiCoSx (CNCS) core-shell architectures. mass loading size outer nanosheets are heavily dependent on carbonization temperature inner nanofibers, which can dramatically impact electrochemical property hybrids. optimized CNCS electrode exhibits an excellent specific high rate capability. assembled asymmetric presents satisfactory energy density (38.73 W h kg−1) 800 kg−1 favorable stability capacitance retention (93.1%) after 8000 cycles. This strategy regulate interface promising development TMS-based