Charge-discharge behaviour of lithium ion secondary battery using graphitized mesophase pitch-based carbon fiber anodes

Abstract

Mesophase pitch-based carbon fibers(MPCF) have been investigated as an anode active material for lithium ion secondary battery. Graphitized MPCF gives high discharge capacity and good Ah efficiency. MPCF/Li cell shows an initial discharge capacity of 300 mAh/g and Ah efficiency above at a current density of 25 mA/g at V. Cylindrical lithium ion secondary battery was fabricated using mixed carbon anode and , cathode. In order to improve the cyclability of lithiun ion secondary battery, other carbons were added to the MPCF up to . The cycle performance of lithium ion secondary battery using mixed carbons was superior to those using graphitized MPCF.