CHARGE DISCHARGE CHARACTERISTICS OF SYNTHETIC CARBON ANODE FOR LITHIUM SECONDARY BATTERY

Recent studies on carbon anodes for lithium secondary batteries have r evealed that the electrochemical performances of carbon anodes largely depend on the nature of carbon precursors, heat-treatment condition, structural characteristics of carbons, and so on. In order to clarify the relationship between the carbon structures and electrochemical pro perties, several kinds of model carbons with different structures were synthesized from three types of pure compounds, acenaphthylene, coron ene and phenolphthalein, and their electrochemical characteristics wer e investigated. As a result, all the model carbons carbonized at 800 d egrees C demonstrate higher capacities than the theoretical one (372 A h kg(-1)). Moreover, the structures of the carbons synthesized from th e admixtures of acenaphthylene and phenolphthalein were determined by the dominant component, acenaphthylene or phenolphthalein and their di scharge capacities were also determined by the corresponding concentra tion in the carbon mixture.