Advanced Te_xS_y-C Nanocomposites for High-Performance Lithium Ion Batteries

This study is dedicated to expand the family of lithium-tellurium sulfide batteries, which have been recognized as a promising choice for future energy storage systems. Herein, a novel electrochemical method has been applied to engineer micro-nano Te_xS_y material, and it is found that Te_xS_y phases combined with multi-walled carbon nanotubes endow the as-constructed lithium-ion batteries excellent cycling stability and high rate performance. In the process of material synthesis, the sulfur was successfully embedded into the tellurium matrix, which improved the overall capacity performance. Te_xS_y was characterized and verified as a micro-nano-structured material with less Te and more S. Compared with the original pure Te particles, the capacity is greatly improved, and the volume expansion change is effectively inhibited. After the assembly of Li-Te_xS_y battery, the stable electrical contact and rapid transport capacity of lithium ions, as well as significant electrochemical performance are verified.