Microemulsion Synthesis of Tin oxide-Graphite Nanocomposites as Li-ion Battery Anodes

摘要

Sn-based Li storage materials are most noted for their high specific capacities either on the weight or volume basis.However,the large volume expansion and contraction problem in cycling is the major cause of material failure in applications.[1-2] Recent work has shown that a uniform dispersion of SnO_2 on carbonaceous materials can reduce the rapid capacity fading to some extent.[3] Here we report the synthesis of nanoscale SnO_2-graphite composites using a reverse microemulsion method and Tergitol 15-S-5 as the surfactant; followed by the evaluation of their electrochemical properties of interest to Li ion battery applications.