可逆固体氧化物电池氧电极材料氧表面交换系数测定及研究进展  

Determination of Oxygen Surface Exchange Coefficient for Oxygen Electrode Materials of Reversible Solid Oxide Cells

作　　者：陈婷 刘魁 郑国柱 张广君 庄子辰 凌意瀚 王绍荣[1] CHEN Ting;LIU Kui;ZHENG Guozhu;ZHANG Guangjun;ZHUANG Zichen;LIN Yihang;WANG Shaorong(School of Chemical Engineering and Technology,China University of Mining and Technology,Xuzhou 221116,Jiangsu,China;School of Materials Science and Physics,China University of Mining and Technology,Xuzhou 221116,Jiangsu,China)

机构地区：[1]中国矿业大学化工学院,江苏徐州221116 [2]中国矿业大学材料与物理学院,江苏徐州221116

出　　处：《硅酸盐学报》2023年第10期2727-2738,共12页Journal of The Chinese Ceramic Society

基　　金：国家自然科学青年基金(52202334)。

摘　　要：可再生能源储能与燃料电池发电是目前中国双碳背景下最重要的发展方向。可逆固体氧化物电池(RSOCs)是极具前景的能源存储与转化装置,具有能量转化效率高、排放低等优点。通常氧电极(正极)材料的极化阻抗大、氧还原/氧析出反应慢,影响了RSOCs的性能,而氧表面交换系数(k)被认为是限制氧还原/析出反应的最关键因素之一。本文总结了目前国内外k值测定方法的种类、原理及其优缺点,并重点介绍了利用光透射弛豫方法测量k值的原理、优势及应用进展。同时分析总结了缺陷化学、表面化学、晶向、晶粒尺寸和晶界、结晶度等因素对k值以及氧电极催化活性的影响。最后对未来的研究方向提出了若干建议。Energy storage and fuel cell power generation are the most important development directions for realizing the carbon neutrality goal in China.Reversible solid oxide cells(i.e.,RSOCs)are promising electrochemical energy conversion devices with a high efficiency and a low emission.The polarization resistance of oxygen electrode is large,and oxygen reduction/evolution reaction(ORR/OER)is sluggish.A lower oxygen exchange rate is considered as a main rate limiting step in reactions of RSOCs,restricting the efficiency and performance.This review summarized various techniques for characterizing the oxygen surface exchange coefficient(k),and introduced the working principle,merits and research progress of optical transmission relaxation approach.Also,this review discussed the factors like defect chemistry,surface chemistry,orientation,grain boundary/grain size and the crystallinity on the oxygen exchange kinetics and catalytic activity of oxygen electrode,and gave some advices for the future research.

关 键 词：可逆固体氧化物电池 薄膜氧电极 氧还原/氧析出反应 氧表面交换 光透射弛豫 

分 类 号：TM911.47[电气工程—电力电子与电力传动]