Tea waste derived microporous active carbon with enhanced double-layer supercapacitor behaviors

By Xinyu Song, Xinlong Ma, Y. Li, Liang‐Xin Ding, Ruiyu Jiang. Applications of Surface Science, 2019

155 citations recorded by the source corpus.

Abstract Activated carbon (TC1200) is prepared from tea waste via activation and carbonization. The specific surface area of TC1200 is 911.92 m2 g−1 and N-doping is achieved simultaneously due to the existence of N-enriched components in the carbon precursor. The TC1200 exhibits superior capacitive performances on a symmetric supercapacitor in the aspects of ultralong cycle stability (96.66% capacitance retention after 16,000 cycles at 4 A g−1) and ultrahigh power density (33,494.70 W kg−1 for an energy density of 19.45 Wh kg−1). The enhanced electroconductivity and the excellent wettability provided by the N elements synergistically facilitate the diffusion of the electrolyte ion into the bulk of the carbon material, greatly contributed to the double-layer capacitive behavior and the capacitance of the carbon material. This methodology supports the high-value added utilization of the biomass and provides an opportunity for the scalable production of activated carbons for supercapacitor energy storage devices.

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

View Paper: https://www.semanticscholar.org/paper/9dd267f4a77a49dc9c18c1c880eb35434428751a