Ultrasonication-assisted fabrication of porous ZnO@C nanoplates for lithium-ion batteries

Lithium-ion batteries have made significant commercial and academic progress in recent decades. Zinc oxide (ZnO) has been widely studied as a lithium-ion battery anode due to its high theoretical capacity of 987 mAh g-1, natural abundance, low cost, environmental friendliness. However, ZnO suffers from poor electronic conductivity large volume variation during the discharge/charge process, leading deterioration long-term cycling. Herein, porous ZnO@C nanoplates are developed offer short ion diffusion pathways good conduction networks for both Li ions electrons. The provide abundant active sites electrochemical reactions with minimized charge transfer impedance. As result, deliver higher performance storage compared bare anode. Furthermore, introduction reduced graphene (rGO), ZnO@C@rGO composite achieves 229.3 g-1 at current density 2 A g-1.