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.