Gold-Palladium nanoparticles supported by mesoporous β-MnO 2 air electrode for rechargeable Li-Air battery

Arjun Kumar Thapa, Tae Ho Shin, Shintaro Ida, Gamini U. Sumanasekera, Mahendra K. Sunkara, Tatsumi Ishihara

    Research output: Contribution to journalArticlepeer-review

    52 Citations (Scopus)

    Abstract

    The electrochemical performance and electrode reaction using Au-Pd nanoparticle (NP) supported mesoporous β-MnO 2 as a cathode catalyst for rechargeable Lithium-Air (Li-Air) battery is reported here for the first time. In this study, Au-Pd NP-supported mesoporous β-MnO 2 was successfully synthesized by hydrothermal process using a silica KIT-6 template. It has an initial discharge capacity of ca. 775 mAh g -1 with high reversible capacity at a current density of 0.13 mA cm -2. The Au-Pd NP-supported mesoporous β-MnO 2 cathode catalyst, which enhances the kinetic of oxygen reduction and evolution reactions (ORR/OERs), thereby improves energy and coulombic efficiency of the Li-Air cell. Raman spectroscopy and ex-situ XRD results of the Au-Pd NP-supported mesoporous β-MnO 2 air electrode suggest that the observed capacity comes from oxidation of Li + to form Li 2O 2 during discharge to 2.0 V.

    Original languageEnglish
    Pages (from-to)211-216
    Number of pages6
    JournalJournal of Power Sources
    Volume220
    DOIs
    Publication statusPublished - Dec 15 2012

    All Science Journal Classification (ASJC) codes

    • Renewable Energy, Sustainability and the Environment
    • Energy Engineering and Power Technology
    • Physical and Theoretical Chemistry
    • Electrical and Electronic Engineering

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