New strategy for boosting cathodic performance of low temperature solid oxide fuel cells via chlorine doping  

作　　者：ShaoHua Xu Hao Qiu Shanshan Jiang Jingjing Jiang Wei Wang Xiaomin Xu Wei Kong Tanaka Dennis Chivurugwi Arkadii Proskurin Daifen Chen Chao Su 

机构地区：[1]School of Energy and Power,Jiangsu University of Science and Technology,Zhenjiang 212100,China [2]Institute of Analysis and Testing,Beijing Academy of Science and Technology,Beijing 100089,China [3]State Key Laboratory of Materials-Oriented Chemical Engineering,College of Chemical Engineering,Nanjing Tech University,Nanjing 211816,China [4]WA School of Mines:Minerals,Energy and Chemical Engineering,Curtin University,Perth,WA6102,Australia [5]Admiral Makarov National University of Shipbuilding,Heroiv Ukrainy av.9,Mykolaiv,54025,Ukraine

出　　处：《Nano Research》2024年第9期8086-8094,共9页纳米研究（英文版）

基　　金：the support of the National Key Research and Development Program of China(No.2022YFB4002502;supported by the National Natural Science Foundation of China(Nos.22309067 and 22101150);the Open Project Program of the State Key Laboratory of Materials-Oriented Chemical Engineering(No.KL21-05);the Marine Equipment and Technology Institute,Jiangsu University of Science and Technology(No.XTCX202404).

摘　　要：To enhance the performance and widespread use of solid oxide fuel cells(SOFCs),addressing the low-temperature(<650℃)electrochemical performance and operational stability issues of cathode materials is crucial.Here,we propose an innovative approach to enhance oxygen ion mobility and electrochemical performance of perovskite oxide by substituting some oxygen sites with chlorine anions.The designed SrTa_(0.1)Fe_(0.9)O_(3-δ-x)Clx(x=0.05 and 0.10)exhibits improved performance compared to SrTa_(0.1)Fe_(0.9)O_(3-δ)(STF).SrTa_(0.1)Fe_(0.9)O_(2.95-δ)Cl_(0.05)(STFCl0.05)shows the lowest area-specific resistance(ASR)value on Sm0.2Ce0.8O1.9(SDC)electrolyte.At 600℃,STFCl0.05 achieves an ASR value of 0.084Ω·cm^(2),and a single cell with STFCl0.05 reaches a higher peak power density(PPD)value(1143 mW·cm^(-2))than that with STF(672 mW·cm^(-2)).Additionally,besides exhibiting excellent oxygen reduction reaction(ORR)activity at lower temperatures,the STFCl0.05 cathode demonstrates good CO_(2)tolerance and operational stability.Symmetrical cell operation lasts for 150 h,and single cell operation endures for 720 h without significant performance decline.The chlorine doping approach effectively enhances ORR activity and stability,making STFCl0.05 a promising cathode material for low-temperature SOFCs.

关 键 词：low-temperature solid oxide fuel cells(LT-SOFCs) oxygen reduction reaction(ORR) CO_(2)tolerance chlorine doping 

分 类 号：TM911.4[电气工程—电力电子与电力传动]