Nanomaterials and Solar Energy Conversion Lab, Department of Chemistry, National Institute of Technology, Trichy 620 015, India.
Department of Environmental Engineering and Science, Feng Chia University, Taichung 407, Taiwan.
Ultrason Sonochem. 2018 Mar;41:435-440. doi: 10.1016/j.ultsonch.2017.10.006. Epub 2017 Oct 5.
In this work, a simple sonochemical route was followed to synthesize cobalt stannate (CoSnO) nanocubes using stannous and cobalt chlorides as the precursors in alkaline medium at room temperature. The structure, composition and surface morphology of synthesized CoSnO nanocubes have been characterized by using X-ray diffraction analysis (XRD), Fourier transform infrared spectroscopy (FT-IR), Field emission scanning electron microscopy (FE-SEM) and high-resolution transmission electron microscopy (HR-TEM) indicates that the CoSnO nanocubes are crystalline, single-phase without any impurity phase; the sizes of nanocubes are ∼100 nm. The cyclic voltammetry, galvanostatic charge-discharge cycling test, and electrochemical impedance spectroscopy (EIS) measurements are carried out for the CoSnO nanocubes shows a specific capacitance 237 F g at 0.5 mA cm current density and in 1 M NaSO electrolyte. CoSnO nanocubes exhibit long cycling life with 80% retention of initial capacitance after 2000 cycles and the excellent rate capability at 15 mA cm as much as 70% of that at 0.5 mA cm suggest its potential use for supercapacitor applications.
在这项工作中，采用简单的超声化学法，以氯化亚锡和氯化钴为前驱体，在碱性介质中于室温下合成了锡酸钴（CoSnO）纳米立方体。采用 X 射线衍射分析（XRD）、傅里叶变换红外光谱（FT-IR）、场发射扫描电子显微镜（FE-SEM）和高分辨率透射电子显微镜（HR-TEM）对合成的 CoSnO 纳米立方体的结构、组成和表面形态进行了表征，结果表明 CoSnO 纳米立方体是结晶的、单相的，没有任何杂质相；纳米立方体的尺寸约为 100nm。对 CoSnO 纳米立方体进行了循环伏安法、恒电流充放电循环测试和电化学阻抗谱（EIS）测量，结果表明在 0.5mAcm 的电流密度和 1M NaSO 电解质中，比电容为 237Fg。CoSnO 纳米立方体具有良好的循环稳定性，经过 2000 次循环后，初始电容保持率为 80%，在 15mAcm 的高电流密度下，仍具有 70%的电容保持率，表明其在超级电容器应用方面具有潜在的应用前景。
