Recent Progress in Nanostructured Oxide TE Materials for Power Generation at High Temperatures

Ngo Van Nong, Nini Pryds, Søren Linderoth, Michitaka Ohtaki, Dang Le Minh, Nguyen Thi Thuy

    Research output: Contribution to conferenceConference abstract for conferenceResearch

    Abstract

    Thermoelectric (TE) materials, which can convert waste heat into electricity, could play an important role in a global sustainable energy solution and environmental problems. Metal oxides have been considered as potential TE materials for power generation that can operate at high temperatures on the basic of their advantages over chemical and thermal robustness, nontoxic and cheap composed elements. Among oxide materials, layered-cobaltites such as NaCo2O4 and Ca3Co4O9 have recently attracted much attention due to their unusual high TE figure of merit with single crystals, ZT ≈ 1 at 1000 K (ZT = S2σT/κ , where S, σ, T and κ are the Seebeck coefficient, electrical conductivity, absolute temperature and thermal conductivity, respectively). We have fabricated high-quality oxide TE materials based on Ca3Co4O9 by optimizing the method for synthesis, modifying the compositions and by nanostructuring. This report will focus on the high temperature TE properties of heavy ions doping nanostrcutred Ca3Co4O9 oxides, which exhibit promising ZT, implying suitable polycrystalline oxide TE materials for power generation from waste heat.
    Original languageEnglish
    Publication date2011
    Publication statusPublished - 2011
    Event5th International Workshop on Advanced Materials Science and Nanotechnology - Nanoi (VN), 9-12 Nov
    Duration: 1 Jan 2010 → …

    Conference

    Conference5th International Workshop on Advanced Materials Science and Nanotechnology
    CityNanoi (VN), 9-12 Nov
    Period01/01/2010 → …

    Keywords

    • Magnetic refrigeration

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