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Toward High Conversion Efficiency of Thermoelectric Modules through Synergistical Optimization of Layered Materials.
Li, Wenjie; Poudel, Bed; Kishore, Ravi Anant; Nozariasbmarz, Amin; Liu, Na; Zhang, Yu; Priya, Shashank.
Afiliação
  • Li W; Department of Materials Science and Engineering, Pennsylvania State University, University Park, PA, 16802, USA.
  • Poudel B; Department of Materials Science and Engineering, Pennsylvania State University, University Park, PA, 16802, USA.
  • Kishore RA; National Renewable Energy Laboratory, 15013 Denver West Pkwy, Golden, CO, 80401, USA.
  • Nozariasbmarz A; Department of Materials Science and Engineering, Pennsylvania State University, University Park, PA, 16802, USA.
  • Liu N; Department of Materials Science and Engineering, Pennsylvania State University, University Park, PA, 16802, USA.
  • Zhang Y; Department of Materials Science and Engineering, Pennsylvania State University, University Park, PA, 16802, USA.
  • Priya S; Department of Materials Science and Engineering, Pennsylvania State University, University Park, PA, 16802, USA.
Adv Mater ; 35(20): e2210407, 2023 May.
Article em En | MEDLINE | ID: mdl-36868560
Waste-heat electricity generation using high-efficiency solid-state conversion technology can significantly decrease dependence on fossil fuels. Here, a synergistical optimization of layered half-Heusler (hH) materials and module to improve thermoelectric conversion efficiency is reported. This is realized by manufacturing multiple thermoelectric materials with major compositional variations and temperature-gradient-coupled carrier distribution by one-step spark plasma sintering. This strategy provides a solution to overcome the intrinsic concomitants of the conventional segmented architecture that only considers the matching of the figure of merit (zT) with the temperature gradient. The current design is dedicated to temperature-gradient-coupled resistivity and compatibility matching, optimum zT matching, and reducing contact resistance sources. By enhancing the quality factor of the materials by Sb-vapor-pressure-induced annealing, a superior zT of 1.47 at 973 K is achieved for (Nb, Hf)FeSb hH alloys. Along with the low-temperature high-zT hH alloys of (Nb, Ta, Ti, V)FeSb, the single stage layered hH modules are developed with efficiencies of ≈15.2% and ≈13.5% for the single-leg and unicouple thermoelectric modules, respectively, under ΔT of 670 K. Therefore, this work has a transformative impact on the design and development of next-generation thermoelectric generators for any thermoelectric material families.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Revista: Adv Mater Assunto da revista: BIOFISICA / QUIMICA Ano de publicação: 2023 Tipo de documento: Article País de afiliação: Estados Unidos

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Revista: Adv Mater Assunto da revista: BIOFISICA / QUIMICA Ano de publicação: 2023 Tipo de documento: Article País de afiliação: Estados Unidos