Enhanced High-Temperature Thermoelectric Performance of Yb 4 Sb 3 via Ce/Bi Co-doping and Metallic Contact Deposition for Device Integration - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue ACS Applied Energy Materials Année : 2023

Enhanced High-Temperature Thermoelectric Performance of Yb 4 Sb 3 via Ce/Bi Co-doping and Metallic Contact Deposition for Device Integration

Sabah Bux
Takao Mori

Résumé

Thermoelectrics (TE) for very high temperatures (>800 K) have numerous potential applications in heavy industry and space exploration. This article focuses on the compound Yb4Sb3 which is a promising p-type counterpart to the structurally related and high-performance n-type RE3Te4 (RE = Nd, La, Pr) for the fabrication of high-temperature TE modules. A quick and efficient method for synthesizing pure and fully dense Yb4Sb3 samples was developed and optimized using high-energy ball milling followed by reactive spark plasma sintering. The technique was utilized to produce a series of doubly doped CexYb4-xBi0.2Sb2.8 compounds. X-ray diffraction and scanning electron microscopy (SEM) were employed to establish the solubility limit of Ce, which was determined to be x = 0.4. TE properties of Yb4Sb3 and Ce0.4Yb3.6Bi0.2Sb2.8 were measured up to 1273 K, revealing that the doping strategy was effective in reducing the charge carrier concentration and thermal conductivity. This led to a significant increase in the TE figure-of-merit zT from 0.2 to 0.4 at 1273 K. In addition, screening of metallic contacts was conducted for the development of a thermoelectric module with Yb4Sb3. The results showed that two robust TE legs with Ni and Cu contacts were successfully produced through spark plasma sintering. The measured electric contact resistances were very promising, with average values of 2 and 1 mu Omega cm(2) for Ni and Cu contacts, respectively.

Domaines

Chimie Matériaux
Fichier principal
Vignette du fichier
article_Yb4Sb3_SylvainLeTonquesse_2023-08-28.pdf (4.17 Mo) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)

Dates et versions

hal-04299395 , version 1 (22-11-2023)

Identifiants

Citer

Sylvain Le Tonquesse, Hugo Bouteiller, Yoshitaka Matsushita, Araseli Cortez, Sabah Bux, et al.. Enhanced High-Temperature Thermoelectric Performance of Yb 4 Sb 3 via Ce/Bi Co-doping and Metallic Contact Deposition for Device Integration. ACS Applied Energy Materials, 2023, 6 (19), pp.10088-10097. ⟨10.1021/acsaem.3c01693⟩. ⟨hal-04299395⟩
18 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More