Advances in Texturing and Thermoelectric Properties of a Calcium Cobaltite Ceramic via Combined Spark Plasma Sintering and Spark Plasma Texturing

Publikation: Beitrag in FachzeitschriftArtikelForschungPeer-Review

Autoren

  • Katharina Kruppa
  • Anat Karlin
  • Itzhak I. Maor
  • Frank Steinbach
  • Gennady E. Shter
  • Dorothea Stobitzer
  • Wenjie Xie
  • Anke Weidenkaff
  • Meirav Mann-Lahav
  • Gideon S. Grader
  • Armin Feldhoff

Externe Organisationen

  • Technion-Israel Institute of Technology
  • Netzsch Gerätebau GmbH
  • Technische Universität Darmstadt
Forschungs-netzwerk anzeigen

Details

OriginalspracheEnglisch
FachzeitschriftAdvanced functional materials
Frühes Online-Datum23 Okt. 2024
PublikationsstatusElektronisch veröffentlicht (E-Pub) - 23 Okt. 2024

Abstract

Misfit-layered calcium cobaltite [Ca2CoO3-δ]0.62[CoO2] is an outstanding p-type semiconducting thermoelectric with strong anisotropic properties. Texture engineering is crucial for enhancing its thermoelectric performance in polycrystalline ceramics. The in-plane orientation of the grains improves the Seebeck coefficient and electrical conductivity, while the multi-scale parallel interfaces scatter phonons and reduce thermal conductivity. Here, a tandem process of spark plasma sintering and edge-free spark plasma texturing is used to produce dense and highly textured calcium cobaltite ceramics. The resulting ceramic shows a high degree of texturization, secondary phases, and enhanced electrical conductivity of 246 S cm−1 together with a strongly improved Seebeck coefficient of 224 µV K−1 at 1073 K. High grain ordering leads to carrier mobility of 0.49 cm2 V−1 s−1, which has a positive effect on both parameters. With a power factor of 12.4 µW cm−1 K−2 at 1073 K in air, previous thermoelectric performances of calcium cobaltite are surpassed, regardless of its form: pristine, doped, or composite. By combining the high power factor with a relatively low thermal conductivity, a remarkable figure-of-merit of 0.49 at 1073 K in air is obtained for the textured polycrystalline ceramic, which reaches 60 % of the figure-of-merit of a calcium cobaltite single crystal.

ASJC Scopus Sachgebiete

Zitieren

Advances in Texturing and Thermoelectric Properties of a Calcium Cobaltite Ceramic via Combined Spark Plasma Sintering and Spark Plasma Texturing. / Kruppa, Katharina; Karlin, Anat; Maor, Itzhak I. et al.
in: Advanced functional materials, 23.10.2024.

Publikation: Beitrag in FachzeitschriftArtikelForschungPeer-Review

Kruppa, K., Karlin, A., Maor, I. I., Steinbach, F., Shter, G. E., Stobitzer, D., Xie, W., Weidenkaff, A., Mann-Lahav, M., Grader, G. S., & Feldhoff, A. (2024). Advances in Texturing and Thermoelectric Properties of a Calcium Cobaltite Ceramic via Combined Spark Plasma Sintering and Spark Plasma Texturing. Advanced functional materials. Vorabveröffentlichung online. https://doi.org/10.1002/adfm.202409259
Kruppa K, Karlin A, Maor II, Steinbach F, Shter GE, Stobitzer D et al. Advances in Texturing and Thermoelectric Properties of a Calcium Cobaltite Ceramic via Combined Spark Plasma Sintering and Spark Plasma Texturing. Advanced functional materials. 2024 Okt 23. Epub 2024 Okt 23. doi: 10.1002/adfm.202409259
Download
@article{b042e04cea534dd39a098d7b983772b7,
title = "Advances in Texturing and Thermoelectric Properties of a Calcium Cobaltite Ceramic via Combined Spark Plasma Sintering and Spark Plasma Texturing",
abstract = "Misfit-layered calcium cobaltite [Ca2CoO3-δ]0.62[CoO2] is an outstanding p-type semiconducting thermoelectric with strong anisotropic properties. Texture engineering is crucial for enhancing its thermoelectric performance in polycrystalline ceramics. The in-plane orientation of the grains improves the Seebeck coefficient and electrical conductivity, while the multi-scale parallel interfaces scatter phonons and reduce thermal conductivity. Here, a tandem process of spark plasma sintering and edge-free spark plasma texturing is used to produce dense and highly textured calcium cobaltite ceramics. The resulting ceramic shows a high degree of texturization, secondary phases, and enhanced electrical conductivity of 246 S cm−1 together with a strongly improved Seebeck coefficient of 224 µV K−1 at 1073 K. High grain ordering leads to carrier mobility of 0.49 cm2 V−1 s−1, which has a positive effect on both parameters. With a power factor of 12.4 µW cm−1 K−2 at 1073 K in air, previous thermoelectric performances of calcium cobaltite are surpassed, regardless of its form: pristine, doped, or composite. By combining the high power factor with a relatively low thermal conductivity, a remarkable figure-of-merit of 0.49 at 1073 K in air is obtained for the textured polycrystalline ceramic, which reaches 60 % of the figure-of-merit of a calcium cobaltite single crystal.",
keywords = "calcium cobaltites, charge carrier mobility, figure-of-merits, spark plasma sintering, spark plasma texturing, thermoelectrics, transmission electron microscopy",
author = "Katharina Kruppa and Anat Karlin and Maor, {Itzhak I.} and Frank Steinbach and Shter, {Gennady E.} and Dorothea Stobitzer and Wenjie Xie and Anke Weidenkaff and Meirav Mann-Lahav and Grader, {Gideon S.} and Armin Feldhoff",
note = "Publisher Copyright: {\textcopyright} 2024 The Author(s). Advanced Functional Materials published by Wiley-VCH GmbH.",
year = "2024",
month = oct,
day = "23",
doi = "10.1002/adfm.202409259",
language = "English",
journal = "Advanced functional materials",
issn = "1616-301X",
publisher = "Wiley-VCH Verlag",

}

Download

TY - JOUR

T1 - Advances in Texturing and Thermoelectric Properties of a Calcium Cobaltite Ceramic via Combined Spark Plasma Sintering and Spark Plasma Texturing

AU - Kruppa, Katharina

AU - Karlin, Anat

AU - Maor, Itzhak I.

AU - Steinbach, Frank

AU - Shter, Gennady E.

AU - Stobitzer, Dorothea

AU - Xie, Wenjie

AU - Weidenkaff, Anke

AU - Mann-Lahav, Meirav

AU - Grader, Gideon S.

AU - Feldhoff, Armin

N1 - Publisher Copyright: © 2024 The Author(s). Advanced Functional Materials published by Wiley-VCH GmbH.

PY - 2024/10/23

Y1 - 2024/10/23

N2 - Misfit-layered calcium cobaltite [Ca2CoO3-δ]0.62[CoO2] is an outstanding p-type semiconducting thermoelectric with strong anisotropic properties. Texture engineering is crucial for enhancing its thermoelectric performance in polycrystalline ceramics. The in-plane orientation of the grains improves the Seebeck coefficient and electrical conductivity, while the multi-scale parallel interfaces scatter phonons and reduce thermal conductivity. Here, a tandem process of spark plasma sintering and edge-free spark plasma texturing is used to produce dense and highly textured calcium cobaltite ceramics. The resulting ceramic shows a high degree of texturization, secondary phases, and enhanced electrical conductivity of 246 S cm−1 together with a strongly improved Seebeck coefficient of 224 µV K−1 at 1073 K. High grain ordering leads to carrier mobility of 0.49 cm2 V−1 s−1, which has a positive effect on both parameters. With a power factor of 12.4 µW cm−1 K−2 at 1073 K in air, previous thermoelectric performances of calcium cobaltite are surpassed, regardless of its form: pristine, doped, or composite. By combining the high power factor with a relatively low thermal conductivity, a remarkable figure-of-merit of 0.49 at 1073 K in air is obtained for the textured polycrystalline ceramic, which reaches 60 % of the figure-of-merit of a calcium cobaltite single crystal.

AB - Misfit-layered calcium cobaltite [Ca2CoO3-δ]0.62[CoO2] is an outstanding p-type semiconducting thermoelectric with strong anisotropic properties. Texture engineering is crucial for enhancing its thermoelectric performance in polycrystalline ceramics. The in-plane orientation of the grains improves the Seebeck coefficient and electrical conductivity, while the multi-scale parallel interfaces scatter phonons and reduce thermal conductivity. Here, a tandem process of spark plasma sintering and edge-free spark plasma texturing is used to produce dense and highly textured calcium cobaltite ceramics. The resulting ceramic shows a high degree of texturization, secondary phases, and enhanced electrical conductivity of 246 S cm−1 together with a strongly improved Seebeck coefficient of 224 µV K−1 at 1073 K. High grain ordering leads to carrier mobility of 0.49 cm2 V−1 s−1, which has a positive effect on both parameters. With a power factor of 12.4 µW cm−1 K−2 at 1073 K in air, previous thermoelectric performances of calcium cobaltite are surpassed, regardless of its form: pristine, doped, or composite. By combining the high power factor with a relatively low thermal conductivity, a remarkable figure-of-merit of 0.49 at 1073 K in air is obtained for the textured polycrystalline ceramic, which reaches 60 % of the figure-of-merit of a calcium cobaltite single crystal.

KW - calcium cobaltites

KW - charge carrier mobility

KW - figure-of-merits

KW - spark plasma sintering

KW - spark plasma texturing

KW - thermoelectrics

KW - transmission electron microscopy

UR - http://www.scopus.com/inward/record.url?scp=85207130745&partnerID=8YFLogxK

U2 - 10.1002/adfm.202409259

DO - 10.1002/adfm.202409259

M3 - Article

AN - SCOPUS:85207130745

JO - Advanced functional materials

JF - Advanced functional materials

SN - 1616-301X

ER -