Facile synthesis of the Mn3O4 polyhedron grown on N-doped honeycomb carbon as high-performance negative material for lithium-ion batteries

Because of their large volume variation and inferior electrical conductivity,Mn3O4-based oxide anode materials have short cyclic lives and poor rate capability,which obstructs their development.In this study,we successfully prepared a Mn3O4/N-doped honeycomb carbon composite using a smart and facile synthetic method.The Mn3O4nanopolyhedra are grown on N-doped honeycomb carbon,which evidently mitigates the volume change in the charging and discharging processes but also improves the electrochemical reaction kinetics.More import antly,the Mn–O–C bond in the Mn3O4/N-doped honeycomb carbon composite benefits electrochemical reversibility.These features of the Mn3O4/N-doped honeycomb carbon (NHC) composite are responsible for its superior electrochemical performance.When used for Li-ion batteries,the Mn3O4/N-doped honeycomb carbon anode exhibits a high reversible capacity of 598 mAh·g-1after 350 cycles at 1 A·g-1.Even a2 A·g-1,the Mn3O4/NHC anode still delivers a high capacity of 472 mAh·g-1.This work provides a new prospect for synthesizing and developing manganese-based oxide materials for energy storage.