对称固体氧化物燃料电池电极材料Sm_(0.9)Pr_(0.1)FeO_(3-δ)的制备及性能研究
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摘要
采用柠檬酸-硝酸盐自蔓延燃烧法合成了Sm_(0.9)Pr_(0.1)FeO_(3-δ)(SPF)粉体。以YSZ为电解质,SPF同时作为阴极和阳极,构建了对称固体氧化物燃料电池SPF|YSZ|SPF。利用X射线衍射法研究材料的成相以及相互间的化学稳定性,交流阻抗法记录界面极化行为,热膨胀仪评估材料的热膨胀系数,用扫描电子显微镜观察电池的断面微观结构,用自组装的测试系统评价电池输出性能。结果表明,合成的SPF粉体呈钙钛矿结构,且在还原条件下仍保持不变,与电解质YSZ间有良好的化学及热稳定性;800℃时空气及氢气气氛下的电解质|电极间的极化阻抗分别为0.15和15.80Ω·cm2;以加湿H2(含体积分数3%的水蒸气)为燃料气,空气为氧化气时,单电池SPF|YSZ|SPF输出功率密度为168mW/cm2。结果显示SPF是对称固体氧化物燃料电池良好的候选电极材料。
Sm_(0.9)Pr_(0.1)FeO_(3-δ)(SPF)powders were synthesized by a citric acid-nitrates self-propagating combustion method.The YSZ-supported symmetrical solid oxide fuel cell based on the configuration of SPF│YSZ│SPF was fabricated.The phase structure,chemical compatibility,polarization resistance,cross-section microstructure and the cell performance were investigated by X-ray diffraction(XRD),electrochemical impedance spectra,thermal dilatometer,scanning electron microscope(SEM)and self-assembly SOFC test system,respectively.The XRD results indicate that the synthesized SPF powder exhibited a single perovskite structure and was chemically and thermally compatible with YSZ electrolyte.The area specific resistances(ASR)of SPF│YSZ in air and hydrogen atmosphere at 800℃ were 0.15 and 15.80Ω·cm2,respectively.The maximum power density of SPF symmetrical cell was 168mW/cm2 at 850℃ with humidified hydrogen(3%H2O)as fuel and ambient air as oxidant.The results indicate that SPF is a promising electrode material for symmetrical solid oxide fuel cells.
Sm_(0.9)Pr_(0.1)FeO_(3-δ)(SPF)powders were synthesized by a citric acid-nitrates self-propagating combustion method.The YSZ-supported symmetrical solid oxide fuel cell based on the configuration of SPF│YSZ│SPF was fabricated.The phase structure,chemical compatibility,polarization resistance,cross-section microstructure and the cell performance were investigated by X-ray diffraction(XRD),electrochemical impedance spectra,thermal dilatometer,scanning electron microscope(SEM)and self-assembly SOFC test system,respectively.The XRD results indicate that the synthesized SPF powder exhibited a single perovskite structure and was chemically and thermally compatible with YSZ electrolyte.The area specific resistances(ASR)of SPF│YSZ in air and hydrogen atmosphere at 800℃ were 0.15 and 15.80Ω·cm2,respectively.The maximum power density of SPF symmetrical cell was 168mW/cm2 at 850℃ with humidified hydrogen(3%H2O)as fuel and ambient air as oxidant.The results indicate that SPF is a promising electrode material for symmetrical solid oxide fuel cells.
引文
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[2]Ling Y,Yao X,Zhang X,et al.Development of a novel type of composite cathode material for proton-conducting solid oxide fuel cells[J].International Journal of Hydrogen Energy,2012,37(7):5940-5945.
[3]Koh J H,Yoo Y S,Park J W,et al.Carbon deposition and cell performance of Ni-YSZ anode support SOFC with methane fuel[J].Solid State Ionics,2002,149(3):157-166.
[4]Xue Y X A.Modeling of direct HS fueled solid oxide fuel cells with reforming chemical kinetics[J].Fuel Cells,2014,14(2):212-220.
[5]Tao Z,Hou G,Xu N,et al.A mixed proton-oxide ion-electron conducting anode for highly coking-resistant solid oxide fuel cells[J].Electrochimica Acta,2014,150:55-61.
[6]Sun C,Stimming U.Recent anode advances in solid oxide fuel cells[J].Journal of Power Sources,2007,171(2):247-260.
[7]Bastidas D M,Tao S,Irvine J T S.A symmetrical solid oxide fuel cell demonstrating redox stable perovskite electrodes[J].Journal of Materials Chemistry,2006,16(17):1603-1605.
[8]RuizMorales J C,CanalesVázquez J,Lincke H,et al.Potential electrode materials for symmetrical solid oxide fuel cells[J].Boletín De La Sociedad Espa1ola De Cerámica YVidrio,2008,47(4):183-188.
[9]Morales J C R,Lincke H,Marrero-López D,et al.Lanthanum chromite materials as potential symmetrical electrodes for solid oxide fuel cells[J].Boletín De La Sociedad Espa1ola De Cerámica Y Vidrio,2007,46(4):218-223.
[10]Xie M,Liu X,Han D,et al.Symmetrical solid oxide fuel cells with impregnated SrFe0.75Mo0.25O3-δ,electrodes[J].Journal of Power Sources,2014,252:58-63.
[11]Lu J,Yin Y M,Li J C,et al.A cobalt-free electrode material La0.5Sr0.5Fe0.8Cu0.2O3-δ,for symmetrical solid oxide fuel cells[J].Electrochemistry Communications,2015,61:18-22.
[12]Yang L,Cheng Z,Liu M,et al.New insights into sulfur poisoning behavior of Ni-YSZ anode from long-term operation of anode-supported SOFCs[J].Energy&Environmental Science,2010,3(11):1804-1809.
[13]Zhou J,Chen G,Wu K,et al.The performance of La0.6Sr1.4MnO4,layered perovskite electrode material for intermediate temperature symmetrical solid oxide fuel cells[J].Journal of Power Sources,2014,270(3):418-425.
[14]Shao Z P,Yang G M,Su C,et al.Nano La0.6Ca0.4Fe0.8-Ni0.2O3-δdecorated porous doped ceria as a novel cobaltfree electrode of“symmetrical”solid oxide fuel cells[J].Journal of Materials Chemistry A,2014,2(45):19526-19535.
[15]Yang S,Qin Z,Tan W,et al.Effect of cobalt-substitution Sr2Fe1.5-xCoxMo0.5O6-δfor intermediate temperature symmetrical solid oxide fuel cells fed with H2-H2S[J].Electrochimica Acta,2014,139:13-20.
[16]Jardiel T,Caldes M T,Moser F,et al.New SOFC electrode materials:the Ni-substituted LSCM-based compounds(La0.75Sr0.25)(Cr0.5Mn0.5-xNix)O3-δand(La0.75-Sr0.25)(Cr0.5-xNixMn0.5)O3-δ[J].Solid State Ionics,2010,181(19):894-901.
[17]Kong X,Zhou X,Tian Y,et al.Niobium doped lanthanum calcium ferrite perovskite as a novel electrode material for symmetrical solid oxide fuel cells[J].Journal of Power Sources,2016,326:35-42.
[18]Zhang P,Guan G Q,Khaerudini D S,et al.Properties of A-site nonstoichiometry(Pr0.4)xSr0.6Co0.2Fe0.7Nb0.1-O3-δ(0.9≤x≤1.1)as symmetrical electrode material for solid oxide fuel cells[J].Journal of Power Sources,2014,248:163-171.
[19]Fan W,Sun Z,Wang J,et al.A new family of Ce-doped SmFeO3,perovskite for application in symmetrical solid oxide fuel cells[J].Journal of Power Sources,2016,312:223-233.
[20]Chen Y,Cheng Z,Yang Y,et al.Novel quasi-symmetric solid oxide fuel cells with enhanced electrochemical performance[J].Journal of Power Sources,2016,310:109-117.
[21]Santos-Gómez L D,Compana J M,Bruque S,et al.Symmetric electrodes for solid oxide fuel cells based on Zr-doped SrFeO3-δ[J].Journal of Power Sources,2015,279:419-427.
[22]Fan W,Sun Z,Zhou J,et al.Characterization of Sr/Ru co-doped ferrite based perovskite as a symmetrical electrode material for solid oxide fuel cells[J].Journal of Power Sources,2017,348:94-106.
[23]Khaerudini D S,Guan G,Zhang P,et al.(Bi0.15La0.27-Sr0.53)(Co0.25Fe0.75)O3-δ,perovskite:a novel cathode material for intermediate temperature solid oxide fuel cells[J].Journal of Power Sources,2016,334:137-145.
[24]Chen Y H,Wei Y J,Zhong H H,et al.Synthesis and electrical properties of Ln0.6Ca0.4FeO3-δ(Ln[dbnd]Pr,Nd,Sm)as cathode materials for IT-SOFC[J].Ceramics International,2007,33(7):1237-1241.
[25]Bukhari S M,Giorgi J B.Electrical conductivity dependence of Ni doped Sm0.95Ce0.05 FeO3-δ,on surface morphology and composition[J].Sensors&Actuators BChemical,2011,155(2):524-537.
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[27]Hui R,Sun C,Yick S,et al.Ba1-xPrxCo1-yFeyO3-δas cathode materials for low temperature solid oxide fuel cells[J].Electrochimica Acta,2010,55(16):4772-4775.
[28]Wang S F,Hsu Y F,Lu H C,et al.Sr1-xPrxCo0.95Sn0.05O3-δ,ceramic as a cathode material for intermediate-temperature solid oxide fuel cells[J].International Journal of Hydrogen Energy,2012,37(17):12548-12556.
[29]Wang W G,Mogensen M.High-performance lanthanum-ferrite-based cathode for SOFC[J].Solid State Ionics,2005,176(5):457-462.