Lithium-ion rechargeable cells with polyacenic semiconductor (PAS) and LiCoO_2 electrodes

摘要

Polyacenic semiconductor (PAS), heat-treated at 700℃, has a lithium intercalation capacity as high as 438 mAh g~(-1) which is higher than the theoretical capacity of 372 mAh g~(-1) for graphite. The electrochemical behaviour of PAS is examined'by studying Li/PAS and Li/graphite cells. In a PAS or graphite anode, three reactions are distinguished: (ⅰ) reaction of lithium with the Teflon binder; (ⅱ) decomposition of electrolyte, and (ⅲ) intercalation of Li~+ ions. Two laboratory cells with liquid organic electrolyte or polymer electrolyte and PAS as the anode demonstrate that PAS is a promising anode material for lithium-ion batteries.