Rate capability of lithium intercalation into nano-porous graphitized carbons

Abstract

Nano-porous graphitized carbons were successfully prepared by using mono-dispersed SiO 2 colloidal crystal as a template and mesophase pitch as a carbon source with final heat treatment temperatures (HTT) of 1000–2500 °C. Rate capability of lithium intercalation/de-intercalation of the nano-porous graphitized carbons was investigated. 35–60% of capacities were retained when the current density was increased from 37.2 mA g − 1 to 372 mA g − 1 . Electrochemical impedance spectra indicated that formation of SEI layers caused increased polarization.