IR study of ozone modified graphite matrix

The oxidation of graphite powder was reported to enhance the capacity of gr aphite anodes in Li-ion batteries. Here we present IR-spectroscopic study o f the graphite powder modified via oxidation by ozone with the subsequent L IOH or butyl-li treatment compared to the results obtained by "wet" acid ox idation. Ozone treatment leads to the formation of ozonides, C-O-O-C, carbo xylic and epoxy groups on graphite surface. Subsequent treatment of ozone m odified graphite with LiOH eliminates the majority of C-O containing groups and yields only a Few COOLi surface groups. Treatment of ozonated graphite with butyllithium appears to be more efficient.