Application of carbon to anode material for the lithium secondary battery

Summary form only given. We have studied on the electrochemical characteristics of carbon materials(petroleum coke, pyrolyzed furan resin(PFR), graphitized mesocarbon microbeads(MCMB), etc.) as anode material of the lithium secondary battery by cyclic voltammetry and galvanostatic charge/discharge with current density and electrolyte. The carbon electrodes were prepared by the coating the slurry of carbon of 90wt% and polyvinylidene fluoride of lOwt% as the binder on Cu foil. During cyclic voltammetry, PFR and MCNM shows good cycling behavior in the condition of scan rate of 10mV/sec, potential range between 0V and 3V vs. Li/Li/sup +/ in IM LiAsF/sub 6//PC electrolytic solution. In the case of galvanostatic charge/discharge of PFR and MCNM, LiAsF/sub 6///PC electrolytic solution was best of all electrolytic solutions tested in the condition of current density of 1mA/cm/sup 2/ and potential range between 0V and 1.5V vs. Li/Li/sup +/. And its electrochemical properties were better in current density of 2mA/cm/sup 2/ than in current density of 1mA/cm/sup 2/. At current density of 2mA/cm/sup 2/, PFR electrode showed ca. 100% Ah efficiency and stable utilization behavior with cycling. The utilization was 25% at the 50th cycle.