Electrochemical Performances of Tin Phosphite Electrode for Lithium Ion Batteries

Abstract—Finding alternative materials components of lithium ion batteries (LIBs) with high performances is a key factor to improve this technology. The objective of the present study was to investigate the electrochemical performances of tin phosphite (SnHPO₃) as anode material for LIBs. SnHPO₃ has been synthesized through a simple hydrothermal method and characterized using X-ray diffraction, Fourier transform infrared spectroscopy and scanning electron microscopy techniques. The characterization results proved that SnHPO₃ has been successfully synthesized with no impurities. The electrochemical behavior of SnHPO₃ as anode is discussed using cyclic voltammetry and galvanostatic cycling. Interesting performances have been obtained by using carboxymethyl cellulose (CMC) as binder. SnHPO₃ has shown a good reversible capacity thanks to its open-framework with large size channels that buffer volume expansion of tin nanoparticles and to the CMC binder effect.