Self‐Sacrifice Template Fabrication of Graphene‐like Nitrogen‐Doped Porous Carbon Nanosheets for Applications in Lithium‐Ion Batteries and Oxygen Reduction Reaction

• Published in: Energy technology (Weinheim, Germany) Germany), 2021-12, Vol.9 (12), p.n/a
• Main Authors: Mao, Suhua, Chen, Xiaodong, Li, Junhao, Li, Qi, Zeng, Huahua, Chen, Rongjia, Li, Haixiang, Wu, Ming, Shi, Kaixiang, Nan, Haoxiong, Liu, Quanbing, Dang, Haifeng
• Format: Article
• Language: English
• Subjects: Carbon; Carbon nitride; Catalysts; Catalytic activity; Electrode materials; Electrodes; Fabrication; Graphene; graphene-like porous carbon nanosheets; Lithium; Lithium-ion batteries; Nanosheets; Nitrogen; nitrogen-doped nanosheets; Oxygen reduction reactions; Porosity; Specific surface; Surface area
• ISSN: 2194-4288; 2194-4296
• DOI: 10.1002/ente.202100666

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. Nitrogen‐doped porous carbon nanosheets (NPCN) are synthesized by a self‐sacrifice template method, and the NPCN‐800 electrode exhibits excellent performances in lithium‐ion battery and oxygen reduction reaction. The excellent electrochemical performance is attributed to the existence of a high content of pyridinic nitrogen atoms as well as abundant defects.