N and S co-doped nanosheet-like porous carbon derived from sorghum biomass: mechanical nanoarchitecturing for upgraded potassium ion batteries

Nanosheet-like sorghum biomass obtained by mild alkaline treatment and high-energy ball milling is heteroatom-doped with N and S during pyrolysis. The resulting N, S co-doped carbon shows a significantly improved K-ion storage as an anode material in potassium ion batteries.