Honeycomb-like perovskite oxide electrocatalyst for a hybrid Li-air battery

Young Wan Ju, Seonyoung Yoo, Limin Guo, Changmin Kim, Atsushi Inoishi, Hu Young Jeong, Jeeyoung Shin, Tatsumi Ishihara, Sung Dae Yim, Guntae Kim

    研究成果: ジャーナルへの寄稿学術誌査読

    9 被引用数 (Scopus)

    抄録

    Honeycomb-like Nd0.7Sr0.3CoO3-δ has been successfully prepared with a PMMA hard-template for an energy storage system and characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and nitrogen adsorption-desorption measurements. The prepared 3-dimensionally (3-D) ordered mesoporous Nd0.7Sr0.3CoO3-δ(3DOM-NSC) has a well-developed mesoporous structure and has high specific surface area (22.0 m2 g-1). The catalytic activity for the oxygen reduction reaction (ORR) in 0.1 M KOH solution has been studied by using a rotating-ring-disk electrode (RRDE). In the ORR test, a limiting current density of 5.83 mA cm-2 at 0.7 V (vs. Hg/HgO) with 1600 rpm was obtained, a value comparable with that of Pt/C. Moreover, the ORR mainly favors a direct four-electron pathway. Consequently, the high electrocatalytic activity and mesoporous structure result in stable, excellent performance in a hybrid Li-air cell.

    本文言語英語
    ページ(範囲)A2651-A2655
    ジャーナルJournal of the Electrochemical Society
    162
    14
    DOI
    出版ステータス出版済み - 2015

    !!!All Science Journal Classification (ASJC) codes

    • 電子材料、光学材料、および磁性材料
    • 再生可能エネルギー、持続可能性、環境
    • 表面、皮膜および薄膜
    • 電気化学
    • 材料化学

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