Synthesis of polypyrrole-intercalated layered manganese oxide nanocomposite by a delaminationreassembling method and its electrochemical capacitance performance

Abstract

A polypyrrole-intercalated layered manganese oxide nanocomposite (PPy-Mn O2) has been synthesized by a delaminationreassembling process. X-ray diffraction analysis shows that the basal spacing of the PPy-Mn O2 nanocomposite is 1.38 nm. The room-temperature conductivity of the PPy-Mn O2 nanocomposite is found to be 1.3× 10-1 Scm, which is 4-5 orders of magnitude higher than that of the pristine manganese oxide (6.1× 10-6 Scm). The improved specific capacitance of the PPy-Mn O2 nanocomposite (290 Fg) compared with that of the pristine manganese oxide (221 Fg) is attributed to a combination of the conductivity effect and the high specific capacitance of PPy. © 2009 The Electrochemical Society.