{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,6,16]],"date-time":"2026-06-16T17:16:53Z","timestamp":1781630213045,"version":"3.54.5"},"reference-count":40,"publisher":"MDPI AG","issue":"15","license":[{"start":{"date-parts":[[2025,7,30]],"date-time":"2025-07-30T00:00:00Z","timestamp":1753833600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"2023 National Natural Science Foundation of China","award":["52302295"],"award-info":[{"award-number":["52302295"]}]},{"name":"2023 National Natural Science Foundation of China","award":["2022YFH0044"],"award-info":[{"award-number":["2022YFH0044"]}]},{"name":"2023 National Natural Science Foundation of China","award":["6025310052K"],"award-info":[{"award-number":["6025310052K"]}]},{"name":"Sichuan Science and Technology Program","award":["52302295"],"award-info":[{"award-number":["52302295"]}]},{"name":"Sichuan Science and Technology Program","award":["2022YFH0044"],"award-info":[{"award-number":["2022YFH0044"]}]},{"name":"Sichuan Science and Technology Program","award":["6025310052K"],"award-info":[{"award-number":["6025310052K"]}]},{"name":"Shenzhen Polytechnic University Research Fund","award":["52302295"],"award-info":[{"award-number":["52302295"]}]},{"name":"Shenzhen Polytechnic University Research Fund","award":["2022YFH0044"],"award-info":[{"award-number":["2022YFH0044"]}]},{"name":"Shenzhen Polytechnic University Research Fund","award":["6025310052K"],"award-info":[{"award-number":["6025310052K"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Materials"],"abstract":"<jats:p>The commercialization of proton-conducting fuel cells (PCFCs) is hindered by the limited electroactivity and durability of cathodes at intermediate temperatures ranging from 400 to 700 \u00b0C, a challenge exacerbated by an insufficient understanding of high-entropy perovskite (HEP) materials for oxygen reduction reaction (ORR) optimization. This study introduces an yttrium-doped HEP to address these limitations. A comparative analysis of Ce0.2\u2212xYxBa0.2Sr0.2La0.2Ca0.2CoO3\u2212\u03b4 (x = 0, 0.2; designated as CBSLCC and YBSLCC) revealed that yttrium doping enhanced the ORR activity, reduced the thermal expansion coefficient (19.9 \u00d7 10\u22126 K\u22121, 30\u2013900 \u00b0C), and improved the thermomechanical compatibility with the BaZr0.1Ce0.7Y0.1Yb0.1O3\u2212\u03b4 electrolytes. Electrochemical testing demonstrated a peak power density equal to 586 mW cm\u22122 at 700 \u00b0C, with a polarization resistance equaling 0.3 \u03a9 cm2. Yttrium-induced lattice distortion promotes proton adsorption while suppressing detrimental Co spin-state transitions. These findings advance the development of durable, high-efficiency PCFC cathodes, offering immediate applications in clean energy systems, particularly for distributed power generation.<\/jats:p>","DOI":"10.3390\/ma18153569","type":"journal-article","created":{"date-parts":[[2025,7,30]],"date-time":"2025-07-30T10:55:37Z","timestamp":1753872937000},"page":"3569","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["The Study on the Electrochemical Efficiency of Yttrium-Doped High-Entropy Perovskite Cathodes for Proton-Conducting Fuel Cells"],"prefix":"10.3390","volume":"18","author":[{"given":"Bingxue","family":"Hou","sequence":"first","affiliation":[{"name":"Aviation Engineering Institute, Civil Aviation Flight University of China, Guanghan 618037, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Xintao","family":"Wang","sequence":"additional","affiliation":[{"name":"Industrial Training Center (School of Entrepreneurship and Innovation), Shen Zhen Polytechnic University, Shenzhen 518055, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Rui","family":"Tang","sequence":"additional","affiliation":[{"name":"Aviation Engineering Institute, Civil Aviation Flight University of China, Guanghan 618037, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Wenqiang","family":"Zhong","sequence":"additional","affiliation":[{"name":"Industrial Training Center (School of Entrepreneurship and Innovation), Shen Zhen Polytechnic University, Shenzhen 518055, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Meiyu","family":"Zhu","sequence":"additional","affiliation":[{"name":"Industrial Training Center (School of Entrepreneurship and Innovation), Shen Zhen Polytechnic University, Shenzhen 518055, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Zanxiong","family":"Tan","sequence":"additional","affiliation":[{"name":"Industrial Training Center (School of Entrepreneurship and Innovation), Shen Zhen Polytechnic University, Shenzhen 518055, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Chengcheng","family":"Wang","sequence":"additional","affiliation":[{"name":"Industrial Training Center (School of Entrepreneurship and Innovation), Shen Zhen Polytechnic University, Shenzhen 518055, China"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2025,7,30]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"3898","DOI":"10.1039\/D4EE01608D","article-title":"Phase segregation of a composite air electrode unlocks the high performance of reversible protonic ceramic electrochemical cells","volume":"17","author":"He","year":"2024","journal-title":"Energy Environ. 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