Fabrication of highly N-Doped graphene-like carbon templated from g-C3N4 nanosheets as promising Li-ions battery anode

Nitrogen atoms doping was widely recognized as the promising technique to improve the electrochemical performances of various carbonaceous materials application for energy storage devices. Herein, we reported a facial fabrication of highly N-doped graphene-like carbon (NGC) through the carbonization of a mixture containing polypyrrole and g-C3N4 nanosheets, which was employed as sacrificial template and extra nitrogen source simultaneously. The resultant NGC material integrate a range of excellent features including high nitrogen contents (17.54 at%), large specific surface areas (635.73 m(2)g(-1)) and abundant mesopores with high pore volume (1.9483 cm(3) g(-1)). As anode material in Li-ions batteries, the NGC material exhibits an promising initial discharge capacity of 2749 mAh g(-1) at a current density of 50m Ag-1 and encouraging cycling stability (1143 mAh g(-1) after 200 cycles) as well as excellent rate performance (440 mAh g(-1) at 2 A g(-1)). This feasible fabrication presents a new guidance to exploit high performance N-doped carbon materials for the applications in energy storage devices. (C) 2019 Elsevier Ltd. All rights reserved.