Hydrothermal Synthesis vs Electrodeposition for High Specific Capacitance Nanostructured NiO Films

作者：Xi Yan, Dajin Li, Aleksandra B. Djurišić, Mingyu Xie, Ka Yan Kitty Man, Wai Kin Chan · 发表于：Electrochemical and Solid-State Letters · 年份：2008 · DOI：10.1149/1.2903345 · 被引用次数：68 · 研究领域：Supercapacitor Materials and Fabrication、Transition Metal Oxide Nanomaterials、Copper-based nanomaterials and applications

NiO nanostructured films were synthesized by hydrothermal and electrodeposition methods at different deposition temperatures. Films fabricated by different methods had similar crystalline structures, but different morphologies. The electrochemical properties of the NiO films were studied by cyclic voltammetry (CV) and electrochemical impedance spectroscopy. For both fabrication methods, annealing was necessary to convert the films to NiO. After annealing at 300 ° C , all films behaved as pseudocapacitors. The electrodeposited film fabricated at a deposition temperature of 70 ° C on Ti foil exhibited a high value of pseudocapacitance (148 F/g at 100 mV/s CV scan rate), which suggests that electrodeposited films are promising for supercapacitor applications.