无机材料学报2026，Vol.41Issue(1)：70-78,中插6-中插7,11.DOI:10.15541/jim20250105
Ag掺杂调控中温固体氧化物燃料电池阴极酸性位点增强耐铬能力
Ag Doping Modulating Cathode Acidic Sites to Enhance Chromium Resistance for Intermediate Temperature Solid Oxide Fuel Cells
摘要
Abstract
Cr poisoning is an important factor restricting the practical application of solid oxide fuel cell(SOFC)cathodes.In particular,the alkaline earth-rich perovskite oxide cathodes are prone to cation segregation and impurity poisoning at high temperatures,which can significantly reduce the cathode performance.To improve the Cr resistance of the cathode,the acid site of SrCo0.9Ta0.1O3–δ(SCT)was regulated by Ag doping,whose conductivity,catalytic activity,surface morphology,and composition were then systematically investigated.The results show that Ag doping enhances the conductivity of the material,and the doped material exhibits higher oxygen surface exchange coefficient,which is conducive to improving its cathodic catalytic activity.At 700℃,polarization resistance(Rp)of Sr0.9Ag0.1Co0.9Ta0.1O3–δ(SACT10)cathode is 0.0176 Ω·cm2,significantly lower than that of SCT cathode(0.0366 Ω·cm2).In addition,due to the Ag doping strategy,the average valence state of Co in SACT10 material increases,which further increases the relative acidity and improves the Cr resistance.After operating in Cr-containing atmosphere for 22 h,Rp of SACT10 cathode is 0.205 Ω·cm2,significantly lower than that of SCT cathode(0.964 Ω·cm2),and fewer inert secondary phases are observed on the surface of SACT10 cathode after testing.All above results confirm that Ag doping can effectively increase acid sites,improve activity and enhance Cr resistance.SACT10 obtained in this work is expected to be a promising medium temperature SOFC cathode material.关键词
固体氧化物燃料电池/耐铬能力/酸性位点/碱土离子/表面偏析Key words
solid oxide fuel cell/chromium resistance/acidic site/alkaline earth cation/surface segregation分类
化学化工引用本文复制引用
高源,魏波,金芳军,吕喆,凌意瀚..Ag掺杂调控中温固体氧化物燃料电池阴极酸性位点增强耐铬能力[J].无机材料学报,2026,41(1):70-78,中插6-中插7,11.基金项目
国家自然科学基金(22279025,21773048) （22279025,21773048）
江苏省杰出青年基金(BK20240109) （BK20240109）
中央高校基础研究基金(2023FRFK06005,HIT.NSRIF202204) （2023FRFK06005,HIT.NSRIF202204）
中国博士后科学基金(2024M753513)National Natural Science Foundation of China(22279025,21773048) （2024M753513）
Natural Science Foundation of Jiangsu Province(BK20240109) （BK20240109）
Fundamental Research Funds for the Central Universities(2023FRFK06005,HIT.NSRIF202204) （2023FRFK06005,HIT.NSRIF202204）
China Postdoctoral Science Foundation(2024M753513) （2024M753513）
