Charge-discharge characteristic of polyaniline intercalated graphite oxide

Polyaniline (PANI)-intercalated graphite oxides(GOs) were prepared by the reaction of surfactant-intercalated GO with PANI in N-methyl-2-pyrrolidone, After the interlayer space of GO was saturated by PANI (PANI/GO = 1.5 similar to1.8), excess PANI particles were deposited on the surface of intercalation compounds. Two types of PANI-intercalated GOs with zigzag and planar type PANI chains were obtained depending on the oxygen contents in graphite oxides. Three types of reactions; intercalation-deintercalation of lithium ion into partially decomposed GO stabilized by PANI and PANI containing partially decomposed GO as a counter polyanion, that of perchlorate ion into PANI occurred for these intercalation compounds after the first charge-discharge cycle. The increase of oxygen content lead the increase of the capacity of the first reaction and the discharge capacities at the 15th cycle reached 118 mAh/g for PANI(1.8)GO. The deposition of excess PANI particles or the surface of the intercalation compounds also increased the capacity of the above reaction and the discharge capacity reached 134 mAh/g when the surface area of PANI(1.8)GO was completely covered by PANI particles.