▎ 摘　　要

Graphene-like nitrogen-doped porous carbon nanosheets (NPCN) with high specific surface area are successfully prepared via selecting glucose as a carbon precursor and simultaneously, g-C3N4 as a self-sacrifice template and nitrogen source. Benefiting from its large porosity, high specific surface area, and nitrogen doping properties (mainly pyridinic nitrogen), the as-obtained NPCN-800 shows multifunctional applications as electrode material for lithium-ion batteries (LIBs) and catalyst for oxygen reduction reactions (ORR). For LIBs application, the NPCN-800 delivers the high reversible capacity of 1286 mAh g(-1) at 0.1 A g(-1), rate capability of 258 mAh g(-1) at 10 A g(-1), and cycle stability of 818 mAh g(-1) at 0.2 A g(-1) after 200 cycles. In addition, NPCN-800 exhibits good ORR catalytic activity. Therefore, these attributes make NPCN an auspicious candidate for LIBs and ORR. This simple strategy for preparing nitrogen-doped carbon-based materials provides an efficient way to exploit cost-effective electrode materials for LIBs and catalysts for ORR.