Capacity improvement of mechanically and chemically treated Sri Lanka natural graphite as an anode material in Li-ion batteries

Abstract Sri Lanka natural graphite is found in various morphologies with different structural and physical characteristics. The most abundant morphology, the shiny– slippery–fibrous graphite found in Bogala mines (BSSI), has a very high purity of more than 98% and high crystallinity. Pure natural graphite as well as mechanically ball-milled and chemically oxidated in air or with (NH4)2S2O8 graphite has been evaluated as an anode material for Li-ion battery application, with a focus on improvement of the reversible capacity