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  • Essay / Testing of Electrochemical Supercapacitors - 621

    However, cobalt hydroxide prepared by this technique demonstrated a very low specific capacitance (SC) below 400 F g−1. Since the main limitation of Co(OH)2 is its low conductivity, S. Chen et al. launched the idea of ​​fabricating graphene-Co(OH)2 nanocomposites using certain reducing agents such as HS– and H2S (117). As a result, this research group managed to achieve a specific capacity of 972.5 F g-1, much higher than that of each individual counterpart. However, in the above study, uniform distribution of Co(OH)2 is considered as the main challenge. In contrast, most reports were more concerned with improving SC values. Insufficient attention has been paid to the capacity degradations of metal oxide/hydroxide materials at high current densities [118]. Our group previously reported the use of a lyotropic liquid crystal (LLC) model in the potentiostatic electrodeposition of Co(OH)2, which led to a significant improvement in electrochemical performance (119). Indium tin oxide nanowires are known to possess excellent electrical properties and thermal stability [120, 121], which enables wide applications in the field of electronics. Additionally, titanium was chosen as a current collector due to its excellent mechanical, chemical and thermal stability as well as its abundance in the earth's crust. In this study, we first prepared indium tin oxide nanowires (ITO NWs) by chemical vapor deposition (CVD) on a titanium substrate, and then different mesoporous structures such as Co nanoflakes ( OH) 2 (NF) were deposited on indium-tin. oxide nanowires (ITO NW) by electrodeposition through a lyotropic liquid crystal (LLC) template. Furthermore, a mesoporous Co(OH)2 film, deposited directly on a pure Ti substrate, was prepared to