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Enhanced figure of merit of cement composites with graphene and ZnO nanoinclusions for efficient energy harvesting in buildings

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  • Ghosh, Sampad
  • Harish, Sivasankaran
  • Ohtaki, Michitaka
  • Saha, Bidyut Baran

Abstract

In this work, we have reported the thermoelectric performance of graphene-zinc oxide hybrid cement composites for the first time. Nanostructured graphene and zinc oxide were incorporated into cement to increase the thermoelectric properties of cement composites. The as-received materials were blended, compressed, and subsequently cured at room temperature to make it bulk. On bulk samples, electrical conductivity, Seebeck coefficient, and thermal conductivity were measured. As a consequence of high electrical conductivity and the Seebeck coefficient, the composites exhibited a high value of thermoelectric efficiency. The maximum figure of merit (ZT) of 0.01 is obtained when the contents of graphene and ZnO are 10 wt%, respectively, by mass of cement. This ZT is the highest reported to date for the thermoelectric cement composites, a nearly 70% increase over the previous record with carbon based inclusions. High figure of merit is crucial for energy harvesting applications in future buildings.

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  • Ghosh, Sampad & Harish, Sivasankaran & Ohtaki, Michitaka & Saha, Bidyut Baran, 2020. "Enhanced figure of merit of cement composites with graphene and ZnO nanoinclusions for efficient energy harvesting in buildings," Energy, Elsevier, vol. 198(C).
    • Handle: RePEc:eee:energy:v:198:y:2020:i:c:s036054422030503x
    DOI: 10.1016/j.energy.2020.117396
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    References listed on IDEAS

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    Cited by:

    1. Liu, Xiaoli & Jani, Ruchita & Orisakwe, Esther & Johnston, Conrad & Chudzinski, Piotr & Qu, Ming & Norton, Brian & Holmes, Niall & Kohanoff, Jorge & Stella, Lorenzo & Yin, Hongxi & Yazawa, Kazuaki, 2021. "State of the art in composition, fabrication, characterization, and modeling methods of cement-based thermoelectric materials for low-temperature applications," Renewable and Sustainable Energy Reviews, Elsevier, vol. 137(C).

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