An innovative and facile synthesis route of(La,Sr)_(2)FeO_(4+δ)–La_(0.4)Sr_(0.6)FeO_(3−δ)composite as a highly stable air electrode for reversible solid oxide cell applications  

作　　者：Qihang Ren Yang Zhang Haoliang Tao Ling Qin KonradŚwierczek Wanbing Guan Jianxin Wang Changrong Xia Liangzhu Zhu 

机构地区：[1]Nano Science and Technology Institute,University of Science and Technology of China,Suzhou 215123,China [2]Zhejiang Key Laboratory of Advanced Fuel Cells and Electrolyzers Technology,Ningbo Institute of Materials Technology and Engineering,Chinese Academy of Sciences,Ningbo 315201,China [3]Faculty of Energy and Fuels,AGH University of Krakow,al.A.Mickiewicza 30,Krakow 30-059,Poland [4]College of Materials Science and Engineering,Hubei University of Automotive Technology,Shiyan 442002,China

出　　处：《Journal of Advanced Ceramics》2024年第9期1337-1348,共12页先进陶瓷（英文）

基　　金：support from the National Natural Science Foundation of China(No.22209191);the Ningbo Municipal People’s Government(No.2021A-162-G);the Ningbo Key R&D Project(Nos.2022Z027 and 2023Z103);the Chinese Academy of Sciences President’s International Fellowship Initiative(No.2024VCA0008);the Chinese Academy of Sciences。

摘　　要：Achieving thermal cycle stability is an imperative challenge for the successful commercialization of solid oxide cell(SOC)technology.Ruddlesden‒Popper(R‒P)oxides,whose thermal expansion coefficient(TEC)is compatible with common electrolytes,are promising candidates for SOC applications.However,the two-dimensional conduction characteristic of R‒P oxides leads to insufficient catalytic activity,which hinders their performance.Here,we propose a win‒win strategy for self-assembly decoration by employing a one-pot method to address this issue.By using a single perovskite oxide(La_(0.4)Sr_(0.6)FeO_(3))to modify R‒P oxide(La_(0.8)Sr_(1.2)FeO_(4+δ)),we enhanced the electrochemical performance without compromising the stability of the composite electrode.The strategic incorporation of a 10 mol%perovskite phase at 800℃ resulted in a significant 49%reduction in the polarization resistance(R_(p)),an impressive 86%increase in the maximum power density under power generation mode,and a notable 33%increase in the electrolysis current density under electrolysis mode.Furthermore,the perovskite-decorated R‒P oxide composite also exhibited high thermal and chemical stability,with negligible performance degradation observed under both thermal cycling and charge/discharge cycling conditions.Our results demonstrate that such dual-phase composites,which are simultaneously produced by a onestep process with outstanding catalytic activity and stability,can be considered an effective strategy for the advancement of SOCs.

关 键 词：Ruddlesden−Popper(R−P) solid oxide cell(SOC) air electrode robustness one-pot synthesis 

分 类 号：TQ174[化学工程—陶瓷工业]