Tailoring the Reversible Phase Transition of Perovskite Nanofiber Electrodes for High-Performance and Durable Reversible Solid Oxide Cells  

作　　者：Chaofan Yin Jiaming Yang Jiangyuan Feng Yueyue Sun Zhengrong Liu Junkai Wang Jiajia Cui Zixuan Xue Liang Zhang Yucun Zhou Jun Zhou Liangfei Xu Kai Wu Jianqiu Li 

机构地区：[1]Center of Nanomaterials for Renewable Energy,State Key Laboratory of Electrical Insulation and Power Equipment,Xi’an Jiaotong University,Xi’an 710049,People’s Republic of China [2]Beijing Huairou Laboratory,Beijing 101400,People’s Republic of China [3]Xi’an Thermal Power Research Institute Co.,Ltd,Xi’an 710054,People’s Republic of China [4]School of Materials Science and Engineering,Xi’an University of Technology,Xi’an 710048,People’s Republic of China [5]School of Vehicle and Mobility,Tsinghua University,Beijing 100084,People’s Republic of China

出　　处：《Nano-Micro Letters》2025年第6期559-574,共16页纳微快报(英文版)

基　　金：supported by the National Natural Science Foundation of China(No.52377212 and 51877173);program of Beijing Huairou Laboratory(ZD2022006A);the Key R&D Project of Shaanxi Province(2023-YBGY-057);the State Key Laboratory of Electrical Insulation and Power Equipment(EIPE22314,EIPE22306);the Natural Science Basic Research Program of Shaanxi(No.2023-JC-QN-0483).

摘　　要：Reversible solid oxide cells(RSOCs)are capable of converting various energy resources,between electricity and chemical fuels,with high efficiency and flexibility,making them suitable for grid balancing and renewable energy consumption.However,the practical application of RSOCs is still limited by the insufficient activity and stability of the electrodes in different operating modes.Herein,a highly efficient symmetrical electrode composed of La_(0.3)Sr_(0.6)Ti_(0.1)Co_(0.2)Fe_(0.7)O_(3-δ)(LSTCF)nanofibers and in situ exsolved Co_(3)Fe_(7) nanoparticles is developed for boosting the performance of RSOCs.The reversible phase transition,high activity and stability of the electrode have been confirmed by a combination of experimental(e.g.,transmission electron microscopy and X-ray absorption fine structure)and computational studies.Electrolyte-supported RSOCs with the symmetrical electrode demonstrate excellent catalytic activity and stability,achieving a high peak power density of 0.98 W cm^(-2)in the fuel cell mode using H_(2)as the fuel(or 0.53 W cm^(-2)using CH_(4)as the fuel)and a high current density of 1.09 A cm^(-2) at 1.4 V in the CO_(2)electrolysis mode(or 1.03 A cm^(-2)at 1.3 V for H_(2)O electrolysis)at 800℃while maintaining excellent durability for over 100 h.

关 键 词：Reversible solid oxide cells Reversible phase transition Exsolution and dissolution CO_(2)electrolysis 

分 类 号：O64[理学—物理化学]