| 초록 |
A lithium secondary battery using carbon materials as a negative electrode has been developed. In this paper, Polyacrylonitrile(PAN)-based carbon fibers were tested as anodes for lithium secondary rechargeable batteries. PAN-based fibers were first stabilized under tension in air at about 280°C and then carbonized at heat treatment temperatures (HTT) between 800 and 1200°C. The carbon fiber electrodes were prepared at various conditions using the stabilized PAN fibers and then their electrochemical characteristics were investigated. The effective diffusion coefficient of lithium in the carbon fiber electrode was influenced by the carbonization environment employed. The effect of HTT on discharge capacity varied depending on the combined effect of both the amount of intercalation sites available and the electric conductivity of the carbon fiber used. |
