Highly porous MnO/C@rGO nanocomposite derived from MnBDC@rGO as high-performance anode material for lithium ion batteries

Highly porous MnO/C@rGO nanocomposites have been successfully prepared via a facile and scalable strategy. Firstly, the Mn-BDC was grown in situ on the graphene oxide containing a large number of functional groups, which acted as not only efficient nucleation sites but also structure-directing templates. Then Mn-BDC@GO could be directly carbonized in an inert atmosphere to obtain highly porous MnO/C@rGO nanocomposites. The addition of graphene improved the electronic conductivity, increased the specific surface area, and its two-dimensional structure enhanced the diffusion rate of lithium ions. The as-fabricated MnO/C@rGO nanocomposites exhibited remarkable reversible specific capacity and excellent cycle stability which maintained a reversible discharge capacity of 1536.4 mA h g(-1) after 100 cycles at 100 mA g(-1). And more impressively, a discharge capacity of 909.1mA h g(-1) could be retained at a current density of 1 A g(-1) after 500 cycles, making it a high-performance anode for lithium ion battery. Moreover, high-capacity, long-cycle, and high-rate performance nanocomposites could be prepared as anode material for lithium-ion batteries through this facile, environmentally friendly, cost-effective method. (C) 2019 Elsevier B.V. All rights reserved.