2003 Volume 71 Issue 12 Pages 1157-1159
Thin carbon fibers (TCF) were prepared by the spinning/stabilization/carbonization process of the polymer blend, which consists of phenolic resin (carbon precursor) and polyethylene (pyrolysing polymer without carbon residue). TCF had the diameter of 100∼400 nm and microporous structure. The conventional carbon fibers (Ref-CF) with 10∼20 µm diameter were also obtained from phenolic resin in the same process. The TCF electrode showed different properties for electrochemical Li+ insertion/extraction compared with the Ref-CF electrode. The cycleability and the rate properties for TCF were better than those for Ref-CF. TCF and Ref-CF had the similar carbon structure for pore structure and crystallinity. Therefore, the characteristic properties for TCF can be attributed to the size dimension effect.