{"title":"La₀中钙（Ca）取代锶（Sr）₅₈Sr₀.₄Co₀.₂Fe₀。₈O₃−δ：在IT-SOFC阴极中的稳定性和电化学性能","authors":"Majid Jafari, Fatemeh Yadollahi Farsani, Fabian Grimm","doi":"10.1016/j.electacta.2025.145662","DOIUrl":null,"url":null,"abstract":"The study investigates the effects of substituting calcium (Ca) for strontium (Sr) in La₀.₅₈Sr₀.₄Co₀.₂Fe₀.₈O₃<sub>−δ</sub> (L58CCF) perovskite, evaluating its thermal stability and electrochemical performance as a potential cathode for intermediate-temperature solid oxide fuel cells (IT-SOFCs). Through X-ray diffraction (XRD) and electrochemical impedance spectroscopy (EIS), L58CCF demonstrates superior thermal stability, maintaining its structure up to 1200°C, compared to L58SCF, which undergoes a phase transition above 1000°C. The L58CCF symmetric cell sintered at 950°C has the lowest area-specific resistance (ASR) of 0.99 Ω·cm², offering competitive ASR values compared to L58SCF and L6CCF ones. Additionally, the L58CCF cathode showed an oxygen reduction reaction (ORR) polarization resistance of 0.47 Ω·cm<sup>²</sup> at 800°C, further indicating its efficiency as a cathode material. The study concludes that while L58CCF presents a promising balance of stability and electrochemical performance, further optimization is needed to address impurity phase issues and enhance long-term durability for IT-SOFC applications.","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"203 1","pages":""},"PeriodicalIF":5.5000,"publicationDate":"2025-01-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Calcium (Ca) Substitution for Strontium (Sr) in La₀.₅₈Sr₀.₄Co₀.₂Fe₀.₈O₃−δ: Stability and Elechtrochemical Performance in IT-SOFC Cathodes\",\"authors\":\"Majid Jafari, Fatemeh Yadollahi Farsani, Fabian Grimm\",\"doi\":\"10.1016/j.electacta.2025.145662\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"The study investigates the effects of substituting calcium (Ca) for strontium (Sr) in La₀.₅₈Sr₀.₄Co₀.₂Fe₀.₈O₃<sub>−δ</sub> (L58CCF) perovskite, evaluating its thermal stability and electrochemical performance as a potential cathode for intermediate-temperature solid oxide fuel cells (IT-SOFCs). Through X-ray diffraction (XRD) and electrochemical impedance spectroscopy (EIS), L58CCF demonstrates superior thermal stability, maintaining its structure up to 1200°C, compared to L58SCF, which undergoes a phase transition above 1000°C. The L58CCF symmetric cell sintered at 950°C has the lowest area-specific resistance (ASR) of 0.99 Ω·cm², offering competitive ASR values compared to L58SCF and L6CCF ones. Additionally, the L58CCF cathode showed an oxygen reduction reaction (ORR) polarization resistance of 0.47 Ω·cm<sup>²</sup> at 800°C, further indicating its efficiency as a cathode material. The study concludes that while L58CCF presents a promising balance of stability and electrochemical performance, further optimization is needed to address impurity phase issues and enhance long-term durability for IT-SOFC applications.\",\"PeriodicalId\":305,\"journal\":{\"name\":\"Electrochimica Acta\",\"volume\":\"203 1\",\"pages\":\"\"},\"PeriodicalIF\":5.5000,\"publicationDate\":\"2025-01-04\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Electrochimica Acta\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://doi.org/10.1016/j.electacta.2025.145662\",\"RegionNum\":3,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"ELECTROCHEMISTRY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Electrochimica Acta","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.1016/j.electacta.2025.145662","RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ELECTROCHEMISTRY","Score":null,"Total":0}
Calcium (Ca) Substitution for Strontium (Sr) in La₀.₅₈Sr₀.₄Co₀.₂Fe₀.₈O₃−δ: Stability and Elechtrochemical Performance in IT-SOFC Cathodes
The study investigates the effects of substituting calcium (Ca) for strontium (Sr) in La₀.₅₈Sr₀.₄Co₀.₂Fe₀.₈O₃−δ (L58CCF) perovskite, evaluating its thermal stability and electrochemical performance as a potential cathode for intermediate-temperature solid oxide fuel cells (IT-SOFCs). Through X-ray diffraction (XRD) and electrochemical impedance spectroscopy (EIS), L58CCF demonstrates superior thermal stability, maintaining its structure up to 1200°C, compared to L58SCF, which undergoes a phase transition above 1000°C. The L58CCF symmetric cell sintered at 950°C has the lowest area-specific resistance (ASR) of 0.99 Ω·cm², offering competitive ASR values compared to L58SCF and L6CCF ones. Additionally, the L58CCF cathode showed an oxygen reduction reaction (ORR) polarization resistance of 0.47 Ω·cm² at 800°C, further indicating its efficiency as a cathode material. The study concludes that while L58CCF presents a promising balance of stability and electrochemical performance, further optimization is needed to address impurity phase issues and enhance long-term durability for IT-SOFC applications.
期刊介绍：
Electrochimica Acta is an international journal. It is intended for the publication of both original work and reviews in the field of electrochemistry. Electrochemistry should be interpreted to mean any of the research fields covered by the Divisions of the International Society of Electrochemistry listed below, as well as emerging scientific domains covered by ISE New Topics Committee.
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