Journal
CARBON LETTERS
Volume 31, Issue 1, Pages 67-74Publisher
SPRINGER JAPAN KK
DOI: 10.1007/s42823-020-00150-0
Keywords
Porous carbon bead; Non-solvent induced phase separation; Electric double-layer capacitor; Polyacrylonitrile; Carbonization; Activation
Funding
- Korea Institute of Energy Technology Evaluation and Planning (KETEP) - Ministry of Trade, Industry & Energy (MOTIE) of the Republic of Korea [20164010201070]
- Chungnam National University
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A facile and template-free strategy was developed to prepare activated porous carbon beads (APCBs) with enhanced pore properties. The APCBs exhibited a large specific surface area and pore area, leading to a good specific capacitance and excellent capacitance retention for electrode applications in electric double-layer capacitors.
In this study, we developed a facile and template-free strategy for the preparation of activated porous carbon beads (APCBs) from polyacrylonitrile. The chemical activation with KOH was found to enhance the pore properties, such as specific surface area (SSA), pore volume, and pore area. The APCBs exhibited a large SSA of 1147.99 m(2)/g and a pore area of 131.73 m(2)/g. The APCB-based electrodes showed a good specific capacitance of 112 F/g at 1 A/g in a 6 M KOH electrolyte, and excellent capacitance retention of 100% at a current density of 5 A/g after 1000 cycles. Therefore, the APCBs prepared in this study can be applied as electrode materials for electric double-layer capacitors.
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