Antimony/porous biomass carbon nanocomposites have been prepared by a chemical reduction method and applied as anodes for sodium-ion batteries. The porous biomass carbon derived from a black fungus had a large Brunauer-Emmett-Teller (BET) surface area of 2233 m g in which antimony nanoparticles were uniformly distributed in the porous carbon. The as-prepared antimony/porous biomass carbon nanocomposites exhibited a high reversible sodium storage capacity of 567 mA h g at a current density of 100 mA g , extended cycling stability, and good rate capability.
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