Grain boundary complexions stabilize Mg3Sb2-based thermoelectric devices with superior performance

MPG.PuRe (Max Planck Society)

Abstract

Grain boundary complexions stabilize Mg 3 Sb 2 -based thermoelectric devices with superior performanceGraphical abstract Highlights • Ga-rich grain boundary complexions block Mg-diffusion channels • Mg 3 Sb 2 materials stabilize at 718 K for over 80 h• Single-leg device shows 13.7% maximum efficiency and at least 7-day stability • A two-pair device shows a high efficiency of 12.5% at ΔT =

Authors 12

1. G. Yang
2. Z. Wang

   Max-Planck-Institut für Nachhaltige Materialien

   Affiliation as printed

   Max Planck Institute for Sustainable Materials , 40237 Du ¨sseldorf , Germany

3. Y. Liu

   Shenzhen University · Guangdong Research Center for Interfacial Engineering of Functional Materials

   Affiliation as printed

   College of Materials Science and Engineering , Guangdong Provincial Key Laboratory of New Energy Materials Service Safety , Guangdong Research Center for Interfacial Engineering of Functional Materials , Institute of Deep Underground Sciences and Green Energy , Shenzhen University , Shenzhen 518060 , China

4. D. Mattlat

   Max-Planck-Institut für Nachhaltige Materialien

   Affiliation as printed

   Max Planck Institute for Sustainable Materials , 40237 Du ¨sseldorf , Germany

5. L. Hu

   Shenzhen University · Guangdong Research Center for Interfacial Engineering of Functional Materials

   Affiliation as printed

   College of Materials Science and Engineering , Guangdong Provincial Key Laboratory of New Energy Materials Service Safety , Guangdong Research Center for Interfacial Engineering of Functional Materials , Institute of Deep Underground Sciences and Green Energy , Shenzhen University , Shenzhen 518060 , China

6. F. Liu

   Shenzhen University · Guangdong Research Center for Interfacial Engineering of Functional Materials

   Affiliation as printed

   College of Materials Science and Engineering , Guangdong Provincial Key Laboratory of New Energy Materials Service Safety , Guangdong Research Center for Interfacial Engineering of Functional Materials , Institute of Deep Underground Sciences and Green Energy , Shenzhen University , Shenzhen 518060 , China

7. C. Scheu

   Max-Planck-Institut für Nachhaltige Materialien

   Affiliation as printed

   Max Planck Institute for Sustainable Materials , 40237 Du ¨sseldorf , Germany

8. G. Snyder

   Northwestern University

   Affiliation as printed

   Department of Materials Science and Engineering , Northwestern University , Evanston , IL 60208 , USA

9. M. Wuttig Aachen Institute of Physics (IA)

   Forschungszentrum Jülich · RWTH Aachen University

   Affiliation as printed

   Institute of Physics (IA) , RWTH Aachen University , 52074 Aachen , Germany

   Peter Gru ¨nberg Institute (PGI 10) , Forschungszentrum Ju ¨lich , 52428 Ju ¨lich , Germany

10. Y. Yu Aachen Institute of Physics (IA)

    RWTH Aachen University

    Affiliation as printed

    Institute of Physics (IA) , RWTH Aachen University , 52074 Aachen , Germany

11. S. Zhang

    Max-Planck-Institut für Nachhaltige Materialien

    Affiliation as printed

    Max Planck Institute for Sustainable Materials , 40237 Du ¨sseldorf , Germany

12. C. Zhang

    Shenzhen University · Guangdong Research Center for Interfacial Engineering of Functional Materials

    Affiliation as printed

    College of Materials Science and Engineering , Guangdong Provincial Key Laboratory of New Energy Materials Service Safety , Guangdong Research Center for Interfacial Engineering of Functional Materials , Institute of Deep Underground Sciences and Green Energy , Shenzhen University , Shenzhen 518060 , China