| 초록 |
Aligned carbon nanofibers (ACNFs) were fabricated by electrospinning with high rotary speed. To get synergistic effect of electrical double layer and redox faradaic reaction, NiCo2O4 was deposited on ACNFs using electrodeposition. Among the electrodes with different deposition time (5,10,20, and 30 s), ACNFs covered with NiCo2O4 during 10 s (NC-ACNFs) had the highest specific capacitance (90.1 Fg-1), good rate capability (64.7 %), and cycle stability (85.2 %). To probe the synergistic effect, NC-ACNFs were compared with ACNFs deposited by Co3O4 (C-ACNFs) and randomly aligned carbon nanofibers coated with NiCo2O4 (NC-RCNFs). NC-ACNFs had specific capacitance of 18.4 % and 12.5 % higher than that of C-ACNFs and NC-RCNFs, respectively. These results said that we can improve electrochemically properties of carbon nanofibers by using the synergistic effect. Acknowledgment: This work was supported by the National Research Foundation of Korea (grant no.: NRF-2015R1A4A1042434). |
