Abstract:

The homogeneous solution prepared from agaric was used as carbon sources，and porous sheet composites of N，S co-doped agaric carbon and CoS（CoS/NSAC） were prepared by hydrothermal synthesis and high temperature calcination after adding ZIF-67 precursor.The results showed that the materials had large specific surface area and high electrical conductivity with good electrochemical properties.The CoS/NSAC achieved a specific capacity of 484.8 F/g^{at current density of 0.5 A/g.Its capacity retention rate was 78.8% after 5 000 cycles at a high current density of 20 A/g.The asymmetric supercapacitor assembled with this materials had excellent electrochemical performance with a specific capacity of 154 F/g at current density of 0.6 A/g.When the power density was 362.3 W/kg，the energy density was 7.4 W·h/kg and the capacity retention rate was 81.95% after 1 800 cycles.}

Key words: biomass agaric, cobalt sulfide, N，S co-doped, composites, supercapacitor