Large-scale preparation of shape controlled SnO and improved capacitance for supercapacitors: from nanoclusters to square microplates

摘要: Here, we first provide a facile ultrasonic-assisted synthesis of SnO using SnCl2 and the organic solvent ethanolamine (ETA). The moderate alkalinity ETA ultrasound play very important roles in SnO. After hydrolysis intermediate ETA–Sn(II), as-synthesized nanoclusters undergo assembly, amalgamation, preferential growth to microplates hydrothermal treatment. was characterized by scanning electron microscopy (SEM), transmission (TEM), high-resolution (HRTEM), ultraviolet-visible absorption spectroscopy (UV-vis) X-ray diffraction (XRD). To explore its potential applications energy storage, fabricated into supercapacitor electrode cyclic voltammetry (CV), electrochemical impedance (EIS), galvanostatic charge–discharge measurements. exhibits remarkable pseudocapacitive activity including high specific capacitance (208.9 F g−1 at 0.1 A g−1), good rate capability (65.8 40 excellent cycling stability (retention 119.3% after 10 000 cycles) for application supercapacitors. capacitive behavior with various crystal morphologies observed fitted EIS an equivalent circuit. novel synthetic route is convenient way large-scale production which expected be applicable other metal oxide nanoparticles.