Cotton Stalk-Derived Porous Carbon as Anode Material for Sodium-Ion Batteries

Biomass-derived carbon material has the advantages of economy and high reversible capacity, and become the research hotspot of anode material for sodium-ion batteries (SIBs). Herein, a facile process to prepare carbon material derived from pyrolysis of cotton stalks was reported. As an anode material for SIBs, the sample shows reversible capacity of 76 mA h g⁻¹ after 500 cycles at 0.05 A g⁻¹. In addition, it has specific capacity of 70 mA h g⁻¹ after 1000 cycles at a current density of 0.1 A g⁻¹. This paper provides a new idea to produce carbon material from biomass waste for energy storage and makes a certain contribution to the sustainable development of waste resources.