Synthesis of Highly Dispersed Zn-doped SnO2 Spherical Nano Materials for Anode of Lithium-ion Batteries

In this paper, Zn-doped spherical nano SnO2 lithium-ion battery anode materials were prepared by hydrothermal synthesis using surfactants. The physical and chemical characterization of the composite material was studied by X-ray diffraction, X-ray photoelectron spectroscopy, scanning electron microscopy, transmission electron microscopy, constant-current cycling and electrochemical impedance spectroscopy. When the doped content is 10 wt %, the cyclic stability and rate performance are better than other materials, and the discharge capacity is about 250.5 mAhg−1 after 100 cycles. The electrochemical measurement results show that Zn-doped spherical nano SnO2 composites have broad application prospects. In this paper, Zn-doped SnO2 nanoparticles constructed by hydrothermal synthesis can effectively reduce the grain size and can increase vacancies in the sample, which is conducive to adapt to the volume change during the circulation process, reduce the internal resistance of battery and increase the conductivity. The most favorable Zn-doped content can be found by researching the samples formed at different Zn-doped content.