P-doped hierarchical porous carbon aerogels derived from phenolic resins for high performance supercapacitor

By Jia Guo, Dongling Wu, Tao Wang, Yanyan Ma. Applications of Surface Science, 2019

150 citations recorded by the source corpus.

Abstract P-doped hierarchical porous carbon aerogels are prepared by carbonizing the phloroglucin-formaldehyde resins in the presence of ZnCl2 and subsequently being activated by KOH. Phosphoric acid is simultaneously used as the polymerization catalyst and P-doped agent in the preparation procedure. Compared with un-doped sample, P-doped carbon with hierarchical porous structure shows improved electrochemical performance. The prepared sample that activated at 800 °C exhibits good capacitance of 406.2 F g−1 in 6 M KOH at a scan rate of 5 mV s−1. When the scan rate is 500 mV s−1, the specific capacitance still reaches to 267.4 F g−1, demonstrating good rate capability. When 60 mg of active materials is loaded, the mass specific capacitance of the prepared electrode reaches to 348.8 F g−1 at a scan rate of 5 mV s−1, and the maximum area capacitance is 11.35 F cm−2. The energy density of the prepared sample is as high as 16.97 Wh kg−1 at a power density of 200 W kg−1 and reaches to 8.52 Wh kg−1 at 2000 W kg−1. Importantly, after 100,000 charging and discharging cycles, the specific capacitance of the prepared sample is no attenuated, indicating a long-term electrochemical stability.

Subfields: Biomaterials, Electronic, Optical and Magnetic Materials, Spectroscopy

View Paper: https://www.semanticscholar.org/paper/dc915a049ef0cf1034e72706fdf7ba9b58604837