(La,Sr)MnO_3/YSZ和La_(0.6)Sr_(0.4)Co_(0.2)Fe_(0.8)O_(3-δ)氧电极SOEC性能的比较研究

Performance Comparison of(La,Sr)MnO_3/YSZ and La_(0.6)Sr_(0.4)Co_(0.2)Fe_(0.8)O_(3-δ) Oxygen Electrodes for Solid Oxide Electrolysis Cells

构建了氧电极材料分别为(La,Sr)MnO3/YSZ(LSM/YSZ)和La0.6Sr0.4Co0.2Fe0.8O3-δ(LSCF)的固体氧化物电解池(SOEC)。在750℃、电流密度为0.25A/cm2的SOEC模式下,分别对两种类型的SOEC进行了约110h的电解实验。结果表明,LSM/YSZ可能是较好的SOEC氧电极材料。依据电化学表现、XRD和微观结构,阐述了两种类型SOEC氧电极性能表现的可能机理。

Two planar solid oxide electrolysis cells （SOEC） are fabricated using （La, Sr）MnO3/YSZ（ LSM/ YSZ） and La0. 6 Sr0. 4 Co0. 2 Fe0. 8 O3-δ （LSCF） for oxygen electrodes, respectively-. Two-types SOEC are operated on elec- trolysis tests at 750℃ with a current density of 0. 25A/cme for 110 hours. It indicates that LSM/YSZ may be a good candidate for oxygen electrode of SOEC. In terms of the electrochemical characterization, X-ray diffraction and micro structural characterization for LSM/YSZ and LSCF oxygen electrodes, possible mechanisms of the oxygen reduction and evolution reaction fOr two-type oxygen electrodes are proposed.