4 years ago

S, N Dual-Doped Graphene Fibers: A High-Performance Electrode Material for Supercapacitors

S, N Dual-Doped Graphene Fibers: A High-Performance Electrode Material for Supercapacitors
Yongfeng Li, Xinlong Ma, Yasong Zhou, Yanfang Kan, Guoqing Ning
Sulfur and nitrogen dual-doped graphene fibers (SNGFs) were prepared through an optimized chemical vapor deposition. The SNGFs exhibit a stable 3D fibrous structure, high surface area, abundant mesopores, uniform distribution of S and N atoms and more defects. As electrodes for supercapacitors, the specific capacitance of SNGFs reaches 311 F g−1. The SNGF//SNGF symmetric supercapacitor delivers maximum energy and power densities of 37.7 W h kg−1 and 14 kW kg−1, with excellent cycling stability (92.2 % capacitance remained after 5000 cycles). The result indicates that the SNGFs are a promising candidate as a high-quality electrode material for supercapacitors. S&N: S and N dual doping is combined with a 3D fibrous structure in S, N dual-doped graphene fibers, prepared through a chemical vapor deposition process, thus leading to superior electrode performance in supercapacitors. This work exhibits an effective synthesis method of 3D fiber-like graphene with dual heteroatom doping, which could promote its widespread application in supercapacitors

Publisher URL: http://onlinelibrary.wiley.com/resolve/doi

DOI: 10.1002/celc.201700406

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