Synthesis of mesoporous birnessite-MnO2 composite as a cathode electrode for lithium battery

Arjun Kumar Thapa, Bill Pandit, Rajesh Thapa, Tulashi Luitel, Hem Sharma Paudel, Gamini Sumanasekera, Mahendra K. Sunkara, Nanda Gunawardhana, Tatsumi Ishihara, Masaki Yoshio

    Research output: Contribution to journalArticlepeer-review

    31 Citations (Scopus)

    Abstract

    Mesoporous polythiophene birnessite (b)-MnO2 has been synthesized by a modified interfacial method to develop cathode electrode materials for lithium batteries. The N2 adsorption/desorption isotherm test of mesoporous polythiophene MnO2 shows a type IV hysteresis loop, which is characteristic of a mesoporous structure. Mesoporous polythiophene MnO2 has a high surface area of 226 m2 g-1 with a pore diameter of 5.2 nm The mesoporous polythiophene b-MnO2 cathode electrode for Li-ion battery exhibited an initial discharge capacity of 305 mAh g-1 at a current density of 10 mA g-1, which is almost equal to its theoretical capacity. When applying a current of 300 mA g-1, mesoporous polythiophene MnO2 electrode shows the initial discharge capacity of 211 mAh g-1, which is 69% of its theoretical capacity. Mesoporous polythiophene MnO2 shows high capacity and good cycle stability even at high current densities due to its high surface area and fast Li-ion diffusion path.

    Original languageEnglish
    Pages (from-to)188-193
    Number of pages6
    JournalElectrochimica Acta
    Volume116
    DOIs
    Publication statusPublished - Jan 10 2014

    All Science Journal Classification (ASJC) codes

    • Chemical Engineering(all)
    • Electrochemistry

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