Optimized Structure of Silicon/Carbon/Graphite Composites as an Anode Material for Li-Ion Batteries

Abstract
A combination of cyclic polarization tests, electrochemical impedance spectroscopy, and electrochemical quartz crystal microbalance (EQCM) measurements indicate a film is formed when aluminum is polarized above 4.5V4.5V in 1:11:1 EC+DMCEC+DMC with 1M1M LiBOBLiBOB . The quantity of film that is formed increases with increasing applied potential. Results of EQCM tests suggest the film is AlBO3AlBO3 . The film is very protective against corrosion and inhibits pitting corrosion of aluminum in normally corrosive 1M1M LiTFSILiTFSI .