Abstract
Carbon nanofibers (CNFs) were synthesized by electrospinning followed by thermal treatments. Activated CNFs (ACNFs) with a surface area of 167.9 m2 g−1 were obtained from KOH chemical activation. Both CNFs and ACNFs were tested as electrode materials for Li-ion batteries. The ACNFs electrode exhibited enhanced electrochemical performance compared to CNFs electrode, owing to its higher surface area and porous structure. A reversible capacity of 512 mAh g−1 was retained at the 100th cycle for a current density of 100 mA g−1. Moreover, even at very high current densities of the order of 1000 mA g−1 the ACNF electrode still maintained a reversible capacity of 265 mAh g−1. These results demonstrate the potential application of ACNFs as electrode material for Li-ion batteries.
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