| 초록 |
Sodium-ion capacitors (SICs) have been attracted considerable attention as next-generation energy storage devices. The SIC technologies have significantly proceeded with electrode materials such as carbon-based materials, sulfide, and metal oxide. Among these materials, the carbon-based materials contain several merits, including low-cost and facile fabrication as well as tunable property for electrochemical performance. In this study, biomass-derived carbon materials were prepared from feather meal, a byproduct in poultry industry. In particular, electron-beam irradiation before stabilization led to suitable formation of small basic-structural-units (polyhexagonal carbon microstructure) for outstanding rate capabilities during Na-ion charge/discharge process. As a result, carbon electrodes derived from feather meal exhibit reversible specific capacity of ~150 mA h g-1, resulting from large specific surface area of 2,508 m2 g-1 and numerous heteroatom such as nitrogen and oxygen. |
