Enhancing thermoelectric performance of CaMnO3 through a Y- and La- dual-doping strategy

Amirkhizi, P. ; Madre, M.A. (Universidad de Zaragoza) ; Dura, O.J. ; Torres, M.A. (Universidad de Zaragoza) ; Sotelo, A. (Universidad de Zaragoza) ; Kovalevsky, A.V. ; Rasekh, Sh.

Resumen: A classical ceramic route has been used in this work to prepare Y and La co-doped CaMnO3 thermoelectric compound seeking to improve its thermoelectric properties. The study highlights significant improvements in electrical and thermal transport properties achieved with minimal doping levels and a cost-effective synthesis process. The co-doping strategy effectively reduced electrical resistivity (reaching 10.8 mΩ cm at 800 °C for 0.03 (Y, La)-doped samples) while maintaining a relatively high Seebeck coefficient (300 μV/K at 800 °C for 0.01 (Y, La)-doped samples). Moreover, the thermal conductivity was minimized (1.65 W/(K m) at 800 °C for 0.03 (Y, La)-doped samples), leading to outstanding thermoelectric performance, with 0.47 mW/(K2m) power factor, and 0.25 ZT values at 800 °C (for 0.01 (Y, La)-doped samples. These results are among the best values reported so far for this family of compounds, underscoring the potential of this material for high-temperature thermoelectric applications and the efficiency of the classical ceramic approach with reduced dopant usage.

Idioma: Inglés

DOI: 10.1016/j.ceramint.2024.12.375

Año: 2024

Publicado en: Ceramics International 51, 7 (2024), 9421-9428
ISSN: 0272-8842

Factor impacto JCR: 5.6 (2024)

Categ. JCR: MATERIALS SCIENCE, CERAMICS rank: 3 / 33 = 0.091 (2024) - Q1 - T1

Factor impacto SCIMAGO: 1.034 - Ceramics and Composites (Q1) - Electronic, Optical and Magnetic Materials (Q1) - Surfaces, Coatings and Films (Q1) - Process Chemistry and Technology (Q1) - Materials Chemistry (Q1)

Financiación: info:eu-repo/grantAgreement/ES/AEI/CEX2023-001286-S
Financiación: info:eu-repo/grantAgreement/ES/DGA/T54-23R
Financiación: info:eu-repo/grantAgreement/ES/UZ/UZ2022-IAR-09

Tipo y forma: Article (Published version)

Área (Departamento): Área Expresión Gráfica en Ing. (Dpto. Ingeniería Diseño Fabri.)
Área (Departamento): Área Cienc.Mater. Ingen.Metal. (Dpto. Ciencia Tecnol.Mater.Fl.)