固体氧化物燃料电池铁基钙钛矿BaFe_(1-x)In_(x)O_(3-δ)阴极材料的电催化性能研究  

Electrocatalytic performance of Fe-based perovskite BaFe1-xInxO3-δcathode materials for solid oxide fuel cells

作　　者：李强[1] 赵辉[1] LI Qiang;ZHAO Hui(School of Chemistry and Materials Scieecc,Heilongjiang University,Harbin 150080,China)

机构地区：[1]黑龙江大学化学化工与材料学院,哈尔滨150080

出　　处：《黑龙江大学自然科学学报》2023年第1期34-40,F0003,共8页Journal of Natural Science of Heilongjiang University

基　　金：国家自然科学基金(51972100)。

摘　　要：研究了一种新型固体氧化物燃料电池阴极催化剂铁基钙钛矿氧化物BaFe_(1-x)In_(x)O_(3-δ),对材料的物相结构、热膨胀性能、氧还原反应动力学和电化学性能进行了系统的评估。其中,BaFe_(1-x)In_(x)O_(3-δ)(BFIn10)阴极表现出最优异的电极性能,700℃下电极的极化电阻为0.25Ω·cm^(2),当阴极过电位为32 mV时,BFIn10电极的电流密度为90 mA·cm^(-2)。通过比较不同温度和氧分压下电极的极化电阻,确定了BFIn10阴极上发生的氧还原反应主要包括离子从三相界面到CGO电极的转移过程和电荷的迁移过程。Fe-based perovskite oxide BaFe_(1-x)In_(x)O_(3-δ)was investigated as novel cathode electrocatalyst for solid oxide fuel cell.The phase structure,thermal expansion behavior,oxygen reduction reaction(ORR)kinetics and electrochemical properties of the BaFe_(1-x)In_(x)O_(3-δ)cathodes were intensively evaluated.BaFe_(1-x)In_(x)O_(3-δ)(BFIn10)cathode presents outstanding electrode activity.It achieves the lowest polarization resistance of 0.25Ω·cm^(2)at 700℃in air,and excellent current density of 90 mA·cm^(-2)at a constant overpotential of 32 mV.The ORR process for BFIn10 cathode is identified to be the oxide ions transfer from the triple phase boundary(TPB)to CGO electrolyte and charge transfer process on the electrode by comparing the polarization resistance under different temperature and oxygen partial pressure.

关 键 词：固体氧化物燃料电池 阴极材料 电催化性能 氧还原反应 

分 类 号：O604[理学—化学]