Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 618, Issue -, Pages 227-232Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2014.08.166
Keywords
Intense pulsed light; Supercapacitors; Metal oxide; Nanoflake
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Funding
- Technology Development Program for Strategic Core Materials - Ministry of Trade, Industry Energy [10047758]
- Basic Science Research Program through the National Research Foundation of Korea (NRF) - Ministry of Education, Republic of Korea [2012R1A6A1029029, 2012R1A2A2A01013080]
- National Research Foundation of Korea [2012R1A2A2A01013080] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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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. (C) 2014 Elsevier B.V. All rights reserved.
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