Synthesis of SnO_2 nanoflowers and electrochemical properties of Ni/SnO_2 nanoflowers in supercapacitor

摘要

3D SnO_2 nanoflowers on Ti foil have been synthesized by a simple hydrothermal method without using any surfactant or catalyst. The synthesized 3D SnO_2 nanostructures are characterized by X-ray diffraction, field emission scanning electron microscopy and X-ray photoelectron spectroscopy. The FESEM results showed that the nanoflower consists of multiple nanopetals of width ～5 nm and each SnO_2 nanoflower is ～3 μm in diameter. The time-dependent morphology evolution of SnO_2 nanoflowers was studied in detail, and a possible growth mechanism was proposed. In addition, high dispersed Ni nanoparticles was loaded on SnO_2 nanoflowers applied in supercapacitor. The electrochemical properties of the 3D Ni/SnO_2 nanoflowers were investigated by a series of electrochemical tests.