Abstract
It is of great importance to develop electrode materials at a low cost for constructing high-performance electrochemical energy storage systems. Herein, we employed flour food waste residue as a raw material to prepare porous carbon based supercapacitor electrodes through the carbonization and subsequent KOH activation process. The as-prepared biomass-derived activated carbon exhibits an interconnected porous network with numberous open micropores and appropriate mesopores. Meanwhile, its moderate total pore volume results in a high mass density of 0.86 g cm-3. When used as supercapacitor electrodes in an aqueous solution of KOH (6 mol L-1), the porous carbon material shows a high specific capacitance (278 F g-1, 241 F cm-3) and good cycling stability with 95% capacitance retention over 3000 cycles at a current density of 2 A g-1. Furthermore, even at an ultrahigh current density of 100 A g-1 (charge/discharge completed within 3 s), it still maintains a high specific capacitance of 142 F g-1 (122 F cm-3).
Original language | English |
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Pages (from-to) | 89391-89396 |
Number of pages | 6 |
Journal | RSC Advances |
Volume | 6 |
Issue number | 92 |
DOIs | |
Publication status | Published - 2016 |
Externally published | Yes |
ASJC Scopus subject areas
- General Chemistry
- General Chemical Engineering