Abstract
In this study electrochemical characteristics of various carbon electrodes, used as the anode of the lithium ion batteries have been investigated. The relationship between the capacity of lithium ion batteries and the microstructure and properties of carbon anodes were carefully examined. The X-ray diffraction and Raman spectra were used to examined the structures of carbon materials. Elemental analysis to determine the compositions after different heat treatments. Moreover, charge-discharge cyclic tests and cyclic voltammograms were employed to get the electrochemical properties of the batteries and correlated to the different parameters of carbon materials. Discharge capacity of carbons were found to be influenced by the values of Lc and La of materials. This study divides into two major parts: first part is that the research of various morphology carbon materials used as anode of lithium ion battery. All four anode materials exhibit various degrees of graphitization and electrochemical performance. Compared with MCMB to find other three kind of carbon material the good and bad points, so as to improve its electrochemistry characteristic. Another part is that high rate capability of carbon nanobeads as an anode material for lithium secondary batteries. In this communication we report a simple method to make the carbon nanobeads in low temperature. The carbon materials were made from C5Cl6 and C6Cl6 reaction with sodium dispersed in wax respectively . We decrease the active material particle size and shorten the distance of lithium ion diffusing obviously. With this kind of carbon material, we can get a high rate and good cycle performance of anode of lithium ion battery. There will be further development of the application in the automobile in the future.