A Cu-based CuGe(S, Te) argyrodite: its widespan cubic-phase region and ultralow lattice thermal conductivity

This work discloses a newly-discovered Cu 8− x Ge(S, Te) 6 argyrodite stabilizing in a high-symmetry cubic phase in the entire low-to-mid temperature region (250-700 K). Partially substituting the sulfur with tellurium increases the configuration entropy, enabling the Cu 8− x Ge(S, Te) 6 as a promis...

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Published inJournal of materials chemistry. A, Materials for energy and sustainability Vol. 11; no. 2; pp. 1532 - 1537
Main Authors Tsai, Yi-Fen, Stern, Charlotte L, Chen, Bo-Chia, Snyder, G. Jeffrey, Wu, Hsin-Jay
Format Journal Article
Published 23.05.2023
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Summary:This work discloses a newly-discovered Cu 8− x Ge(S, Te) 6 argyrodite stabilizing in a high-symmetry cubic phase in the entire low-to-mid temperature region (250-700 K). Partially substituting the sulfur with tellurium increases the configuration entropy, enabling the Cu 8− x Ge(S, Te) 6 as a promising mid-entropy thermoelectric (TE) alloy with ultralow thermal conductivity. This work discloses a newly-discovered Cu 8− x Ge(S, Te) 6 argyrodite stabilizing in a high-symmetry cubic phase in the entire low-to-mid temperature region (250-700 K).
Bibliography:For ESI and crystallographic data in CIF or other electronic format see DOI
Electronic supplementary information (ESI) available: Sample synthesis, structural characterization, TE properties assessments, speed of sound measurement, crystal cif file, and details on the structural refinements. CCDC
2245995
https://doi.org/10.1039/d3ta01476b
ISSN:2050-7488
2050-7496
DOI:10.1039/d3ta01476b