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Detail
Journal Article
Facile Synthesis of Porous Carbon Via Self-Activation of Potassium Acetate for High-Performance Supercapacitor Electrodes with Excellent Cyclic Stability
- Authors
- Seok Hun Kang, Bit Na Kim, In Gyoo Kim
- Issue Date
- 201904
- Source
- Energy Technology, v.7 no.5, pp.1-18
- ISSN
- 2194-4288
- Publisher
- John Wiley & Sons
- Abstract
- The capacitance of an electric double-layer capacitor (EDLC) is largely determined by the surface area and the electrical conductivity of the electrode material. To enhance the performance of EDLCs, a separate activation procedure is commonly used to increase the porosity of the electrode. A facile and scalable method of producing highly porous carbon electrodes for high-performance supercapacitors without a separate activation procedure via simple thermal treatment of potassium acetate is reported. Potassium acetate-derived carbon (PAC) exhibits a high specific surface area of 1704 m 2 g ?닋1 and superior electrical conductivity of 22 950 S cm ?닋1 without further treatment. When used for EDLC electrodes, PAC displays a high specific capacitance of 195 F g ?닋1 at 0.5 A g ?닋1 and excellent cyclic stability with capacitance retention of 99.0% over 80 000 charge/discharge cycles. Carbonization and simultaneous self-activation of PAC demonstrates a facile and efficient method of producing carbon electrodes with a high surface area without an additional activation procedure, which provides an efficient solution for producing high-performance supercapacitor electrodes at low cost.
- KSP Keywords
- Activation procedure, Capacitance retention, Charge/discharge cycles, Cyclic stability, Efficient solution, Electric double-layer capacitor, Electrical conductivity(EC), Further treatment, High Specific Capacitance, High specific surface area, High-performance supercapacitors