Yang Zunxian, Qian Kun, Lv Jun, Yan Wenhuan, Liu Jiahui, Ai Jingwei, Zhang Yuxiang, Guo Tailiang, Zhou Xiongtu, Xu Sheng, Guo Zaiping
National &Local United Engineering Laboratory of Flat Panel Display Technology, Fuzhou University, Fuzhou 350002, P. R. China.
Institute for Superconducting &Electronic Materials, University of Wollongong, NSW 2522, Australia.
Sci Rep. 2016 Jun 14;6:27957. doi: 10.1038/srep27957.
Particular N, S co-doped graphene/Fe3O4 hybrids have been successfully synthesized by the combination of a simple hydrothermal process and a subsequent carbonization heat treatment. The nanostructures exhibit a unique composite architecture, with uniformly dispersed Fe3O4 nanoparticles and N, S co-doped graphene encapsulant. The particular porous characteristics with many meso/micro holes/pores, the highly conductive N, S co-doped graphene, as well as the encapsulating N, S co-doped graphene with the high-level nitrogen and sulfur doping, lead to excellent electrochemical performance of the electrode. The N-S-G/Fe3O4 composite electrode exhibits a high initial reversible capacity of 1362.2 mAhg(-1), a high reversible specific capacity of 1055.20 mAhg(-1) after 100 cycles, and excellent cycling stability and rate capability, with specific capacity of 556.69 mAhg(-1) when cycled at the current density of 1000 mAg(-1), indicating that the N-S-G/Fe3O4 composite is a promising anode candidate for Li-ion batteries.
通过简单水热法和后续碳化热处理相结合，成功合成了特定的氮、硫共掺杂石墨烯/四氧化三铁杂化物。这些纳米结构呈现出独特的复合结构，其中四氧化三铁纳米颗粒均匀分散，且有氮、硫共掺杂石墨烯封装层。众多介孔/微孔的特殊多孔特性、高导电性的氮、硫共掺杂石墨烯以及具有高氮硫掺杂水平的封装氮、硫共掺杂石墨烯，使得该电极具有优异的电化学性能。氮-硫-石墨烯/四氧化三铁复合电极展现出1362.2 mAhg⁻¹的高初始可逆容量，100次循环后具有1055.20 mAhg⁻¹的高可逆比容量，以及出色的循环稳定性和倍率性能，在1000 mAg⁻¹电流密度下循环时比容量为556.69 mAhg⁻¹，表明氮-硫-石墨烯/四氧化三铁复合材料是一种有前景的锂离子电池负极候选材料。
