Li Storage behavior in Polyparaphenylene(PPP)-based Disordered Carbon as a Negative Electrode for Li Ion Batteries

Abstract

PPP-based carbons prepared by the Kovacic and the Yamamoto methods give rise to slightly different polymer structures. The low temperature forms of PPP-Kovacic-based carbon heat treated around 700°C shows a Li storage capacity (1000mAh/g) which is 3 times larger than that of Yamamoto (280mAh/g) in the 2nd charging process. It is suggested that the texture as well as the microstructure of these carbons, as characterized by SEM, TEM, and Raman observations, affect the anode performance strongly.