작성자 최고관리자 | 작성일 2015-06-16 22:38:19 | 조회수 500
Journal of Alloys and Compounds, 618 (2015): 227-232.
Kihun Jang, Seongil Yu, Sung-Hyeon Park, Hak-Sung Kim*, Heejoon Ahn*
We report an extremely efficient method for fabricating high-performance supercapacitive CoO/NiCo2O4nanoflakes on Ni-foam substrate by using intense pulsed light (IPL) technology. Structural and morphological characterization is carried out using X-ray diffraction (XRD) and scanning and transmission electron microscopies (SEM and TEM). These reveal that hierarchically structured CoO/NiCo2O4nanoflakes of 150–200 nm in size and a thickness around 10 nm are formed on Ni-foam substrate by IPL irradiation with energy of 20 J cm−2 for 15 ms. The electrochemical behavior of the composites is analyzed by cyclic voltammetry and galvanostatic charge–discharge experiments. The IPL-induced CoO/NiCo2O4/Ni-foam electrode exhibits a very high specific capacitance of 2163 Fg−1 at a discharge current density of 1 Ag−1 and a good rate performance of 908 Fg−1 even at 50 Ag−1.