Potassium compound-assistant synthesis of multi-heteroatom doped ultrathin porous carbon nanosheets for high performance supercapacitors

By Mengyue Liu, J. Niu, Zhengping Zhang, Meiling Dou, Feng Wang. Nano Energy, 2018

298 citations recorded by the source corpus.

Abstract 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 °C possesses ultrathin nanosheet structure (with thickness of 3–5 nm), micropore-dominate porosity (with specific surface area of 962 m2 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.

Subfields: Electrical and Electronic Engineering, Electronic, Optical and Magnetic Materials

View Paper: https://www.semanticscholar.org/paper/f9f5c2f0342bee74bc49e335a3ebdeddfd6ea488