Lv Zhixiang, Wang Zhou, Chen Jianhong
Department of Pharmacy, Danyang People's Hospital Danyang 212300 P. R. China
College of Vanadium and Titanium, Panzhihua University Panzhihua 617000 P. R. China.
RSC Adv. 2019 Jul 19;9(39):22401-22409. doi: 10.1039/c9ra02498k. eCollection 2019 Jul 17.
N-doped nano-graphene derivatives were prepared by a bottom-up organic synthesis method. Through -spacing modification and dynamic self-assembly of the structures of these molecules, ideal lithium ion-transfer aggregation formed between each monolayer. Rapid ion/electron transfer and maintenance of the structural integrity during repeated ion insertion/extraction occurred due to the lack of a covalent interaction force among the assembled structures. The doping level, , number of N atoms, had a significant influence on the molecular self-assembled structures through hierarchical self-assembly. As the N concentration increased, the -space between the nanosheets increased from 3.4 to 4.3. The capacity of the nano-graphene increased greatly from N-doping nano-graphene (NG-N) to 1800 mA h g, indicating that the capacity is related to the structure. Moreover, the N-doping site of nano-graphene was defined and the relationship between the performance and structure was determined.
通过自下而上的有机合成方法制备了氮掺杂的纳米石墨烯衍生物。通过这些分子结构的层间距修饰和动态自组装，在每个单层之间形成了理想的锂离子转移聚集体。由于组装结构之间缺乏共价相互作用力，在重复的离子插入/萃取过程中发生了快速的离子/电子转移并维持了结构完整性。掺杂水平，即氮原子的数量，通过分级自组装对分子自组装结构有显著影响。随着氮浓度的增加，纳米片之间的层间距从3.4增加到4.3。纳米石墨烯的容量从氮掺杂纳米石墨烯（NG-N）大幅增加到1800 mA h g，表明容量与结构有关。此外，确定了纳米石墨烯的氮掺杂位点，并确定了性能与结构之间的关系。
