期刊
NANO ENERGY
卷 51, 期 -, 页码 366-372出版社
ELSEVIER
DOI: 10.1016/j.nanoen.2018.06.037
关键词
Biomass; Multi-heteroatom doping; Porous carbon nanosheet; Volumetric performance; Supercapacitor
类别
资金
- National Natural Science Foundation of China [51432003]
Two-dimensional (2D) porous carbon materials have attracted great attentions as high-performance electrodes for supercapacitors due to their large aspect ratio and high surface area. Generally, micropore-dominant 2D carbon materials have higher densities than hierarchically porous 3D carbon materials, which can provide a new possibility of greatly enhancing the volumetric capacitance. Herein, we propose a facile and low-cost synthesis method of biomass-derived porous carbon nanosheets (PCNSs) with the assistance of the KOH derived potassium compounds using fish scale as precursor. The PCNS obtained at 600 degrees C possesses ultrathin nanosheet structure (with thickness of 3-5 nm), micropore-dominate porosity (with specific surface area of 962 m(2) g(-1)), rich surface heteroatoms (14.64 at% for O, 5.05 at% for N and 0.92 at% for S) and high compacting density (1.06 g cm(-3)), which endow the electrodes with high gravimetric/volumetric capacitance performance in three-electrode and two-electrode systems.
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