Sucrose-derived hard carbon wrapped with reduced graphene oxide as a high-performance anode for sodium-ion batteries

The sucrose dehydrated by H 2 SO 4 and composited with GO, followed by annealing in NH 3 /Ar at 800 °C, generates N-HC/rGO hybrid with more ultra-micropores, which makes the electrochemical performance of the hybrid better than hard carbon alone.