کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1610351 | 1516275 | 2015 | 6 صفحه PDF | دانلود رایگان |
• The CoO/NiCo2O4 nanoflakes are formed on Ni-foam substrate by IPL irradiation.
• The nanoflakes are formed by IPL irradiation with an energy of 20 J cm−2 for 15 ms.
• The CoO/NiCo2O4 nanoflakes exhibit a very high specific capacitance of 2163 Fg−1.
• They show a good rate performance of 908 Fg−1 even at 50 Ag−1.
We report an extremely efficient method for fabricating high-performance supercapacitive CoO/NiCo2O4 nanoflakes 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/NiCo2O4 nanoflakes 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.
Journal: Journal of Alloys and Compounds - Volume 618, 5 January 2015, Pages 227–232