Tin Phosphate Electrode Materials Prepared by the Hydrolysis of Tin Halides for Application in Lithium Ion Battery

Abstract

The synthesis, structural characterization, and electrochemical evaluation as potential anode material for Li ion battery of new materials based on tin phosphate are studied. Hydrothermal treatments of tin halides are used for the preparation of phosphate oxysalts. 119Sn Mössbauer spectroscopy is used to discern the oxidation state of tin in the synthesized materials. Samples prepared with SnCl2 have better electrochemical properties than those prepared with SnF2. Also, low concentration favors the formation of nanostructured materials with an improved capacity retention and high specific capacity. Capacities higher than 500 mAhg−1 are observed after 40 cycles for the ex-SnCl2 nanoparticulate sample.