Abstract
Endothelium corneum gigeriae galli derived 3D hierarchical nitrogen-doped porous carbon was for the first time prepared by preliminary carbonization at 450 °C and final KOH activation at high temperatures. The surface and structural properties of the as-synthesized samples are analyzed with Brunauer-Emmett-Teller surface analyzer apparatus, X-Ray Diffractometer, scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectrometer. The electrochemical performances are analyzed by cyclic voltammetry, galvanostatic charge/discharge cycling and electrochemical impedance spectroscopy. The obtained results show that the sample carbonized at 900 °C possesses the SSA of 2149.9 m2 g-1, average micropore diameter of 1.78 nm, and exhibits the highest initial specific capacitance of 198.0 F g-1 at current density of 1 A g-1 in 6 M KOH solution. It retains good specific capacitance retention of 91.6% after 3000 charge/discharge cycles at current density of 2 A g-1.
Original language | English |
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Pages (from-to) | 464-469 |
Number of pages | 6 |
Journal | Electrochimica Acta |
Volume | 130 |
Early online date | 15 Mar 2014 |
DOIs | |
Publication status | Published - 1 Jun 2014 |
Keywords
- Endothelium corneum gigeriae galli
- High specific surface area
- Nitrogen-doped porous carbon
- Supercapacitor
Profiles
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Oscar Hui
- School of Engineering - Reader in Energy Storage & Conversion
- Emerging Technologies for Electric Vehicles (EV) - Member
- Energy Materials Laboratory - Member
- ClimateUEA - Member
Person: Member, Research Group Member, Academic, Teaching & Research