Design of CO2-Resistant High-Entropy Perovskites Based on Ba0.5Sr0.5Co0.8Fe0.2O3-δ Materials

High-entropy perovskite materials (HEPMs), characterized by their multi-element composition and highly disordered structure, can incorporate multiple rare earth elements at the A-site, producing perovskites with enhanced CO<sub>2</sub> resistance, making them stay high performance and structurally stable in the CO<sub>2</sub> atmosphere. However, this modification may result in reduced oxygen permeability. In this study, we investigated La<sub>0.2</sub>Pr<sub>0.2</sub>Nd<sub>0.2</sub>Ba<sub>0.2</sub>Sr<sub>0.2</sub>Co<sub>0.8</sub>Fe<sub>0.2</sub>O<sub>3-δ</sub> (L<sub>0.2</sub>M<sub>1.8</sub>) high-entropy perovskite materials, focusing on enhancing their oxygen permeability in both air and CO<sub>2</sub> atmospheres through strategic design modifications at the B-sites and A/B-sites. We prepared Ni-substituted La<sub>0.2</sub>Pr<sub>0.2</sub>Nd<sub>0.2</sub>Ba<sub>0.2</sub>Sr<sub>0.2</sub>Co<sub>0.7</sub>Fe<sub>0.2</sub>Ni<sub>0.1</sub>O<sub>3-δ</sub> (L<sub>0.2</sub>M<sub>1.7</sub>N<sub>0.1</sub>) HEPMs by introducing Ni elements at the B-site, and further innovatively introduced A-site defects to prepare La<sub>0.2</sub>Pr<sub>0.2</sub>Nd<sub>0.2</sub>Ba<sub>0.2</sub>Sr<sub>0.2</sub>Co<sub>0.7</sub>Fe<sub>0.2</sub>Ni<sub>0.1</sub>O<sub>3-δ</sub> (L<sub>0.1</sub>M<sub>1.7</sub>N<sub>0.1</sub>) materials. In a pure CO<sub>2</sub> atmosphere, the oxygen permeation flux of the L<sub>0.1</sub>M<sub>1.7</sub>N<sub>0.1</sub> membrane can reach 0.29 mL·cm<sup>-2</sup>·min<sup>-1</sup>. Notably, the L<sub>0.1</sub>M<sub>1.7</sub>N<sub>0.1</sub> membrane maintained a good perovskite structure after stability tests extending up to 120 h under 20% CO<sub>2</sub>/80% He atmosphere. These findings suggest that A-site-defect high-entropy perovskites hold great promise for applications in CO<sub>2</sub> capture, storage, and utilization.

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Journal
Materials
Published
2024-09-23
DOI
https://doi.org/10.3390/ma17184672
Citations
5
Primary Topic
Advancements in Solid Oxide Fuel Cells
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article
Field-Weighted Citation Impact
0.59

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article

Design of CO2-Resistant High-Entropy Perovskites Based on Ba0.5Sr0.5Co0.8Fe0.2O3-δ Materials

Gongping Liu, Wanqin Jin, Yongfan Zhu, Zhengkun Liu et al.
5 citations
Materials
Advancements in Solid Oxide Fuel Cells
0.59
article

Design of CO2-Resistant High-Entropy Perovskites Based on Ba0.5Sr0.5Co0.8Fe0.2O3-δ Materials

Gongping Liu, Wanqin Jin, Yongfan Zhu, Zhengkun Liu, Jia Liu
article en
5 citations

Abstract

High-entropy perovskite materials (HEPMs), characterized by their multi-element composition and highly disordered structure, can incorporate multiple rare earth elements at the A-site, producing perovskites with enhanced CO<sub>2</sub> resistance, making them stay high performance and structurally stable in the CO<sub>2</sub> atmosphere. However, this modification may result in reduced oxygen permeability. In this study, we investigated La<sub>0.2</sub>Pr<sub>0.2</sub>Nd<sub>0.2</sub>Ba<sub>0.2</sub>Sr<sub>0.2</sub>Co<sub>0.8</sub>Fe<sub>0.2</sub>O<sub>3-δ</sub> (L<sub>0.2</sub>M<sub>1.8</sub>) high-entropy perovskite materials, focusing on enhancing their oxygen permeability in both air and CO<sub>2</sub> atmospheres through strategic design modifications at the B-sites and A/B-sites. We prepared Ni-substituted La<sub>0.2</sub>Pr<sub>0.2</sub>Nd<sub>0.2</sub>Ba<sub>0.2</sub>Sr<sub>0.2</sub>Co<sub>0.7</sub>Fe<sub>0.2</sub>Ni<sub>0.1</sub>O<sub>3-δ</sub> (L<sub>0.2</sub>M<sub>1.7</sub>N<sub>0.1</sub>) HEPMs by introducing Ni elements at the B-site, and further innovatively introduced A-site defects to prepare La<sub>0.2</sub>Pr<sub>0.2</sub>Nd<sub>0.2</sub>Ba<sub>0.2</sub>Sr<sub>0.2</sub>Co<sub>0.7</sub>Fe<sub>0.2</sub>Ni<sub>0.1</sub>O<sub>3-δ</sub> (L<sub>0.1</sub>M<sub>1.7</sub>N<sub>0.1</sub>) materials. In a pure CO<sub>2</sub> atmosphere, the oxygen permeation flux of the L<sub>0.1</sub>M<sub>1.7</sub>N<sub>0.1</sub> membrane can reach 0.29 mL·cm<sup>-2</sup>·min<sup>-1</sup>. Notably, the L<sub>0.1</sub>M<sub>1.7</sub>N<sub>0.1</sub> membrane maintained a good perovskite structure after stability tests extending up to 120 h under 20% CO<sub>2</sub>/80% He atmosphere. These findings suggest that A-site-defect high-entropy perovskites hold great promise for applications in CO<sub>2</sub> capture, storage, and utilization.

MaterialsVol. 17(18)
Nanjing Tech University (CN)
National Natural Science Foundation of China, Government of Jiangsu Province, Natural Science Foundation of Jiangsu Province, National Key Research and Development Program of China
Openalex Percentile: Top 33%
Advancements in Solid Oxide Fuel Cells
0.59
DOIOpen Access PDFOpenAlex
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