Kiani Marzieh, Paydar Mohammad Hossein
Department of Materials Science and Engineering, School of Engineering, Shiraz University, Shiraz 71348-51154, Iran.
Materials (Basel). 2023 Jan 1;16(1):399. doi: 10.3390/ma16010399.
This paper examines the electrochemical and microstructural features of SrCoFeGaO (SCFG) with a fibrous structure infiltrated by an SDC electrolyte for use as a cathode in solid oxide fuel cells (SOFCs). An electrospinning process is used to produce SCFG fibers. In a symmetrical cell, SmCeO (SDC) nanoparticles are infiltrated into the porous fibrous SCFG cathode layer after it was applied to the SDC dense electrolyte. Electrochemical impedance spectroscopy (EIS) analysis reveals that the polarization resistance of the SCFG cathode with fiber morphology is significantly lower than that of the same combination with powder morphology. In addition, it is shown that infiltration of SDC oxygen ion conductor nanoparticles enhanced electrochemical performance. The lowest value of polarization resistance, 0.03 Ω cm at 800 °C, is attained by the SCFG with a fibrous structure containing 14 wt% SDC nanoparticles.
本文研究了具有纤维结构且被SDC电解质渗透的SrCoFeGaO（SCFG）的电化学和微观结构特征，该材料用作固体氧化物燃料电池（SOFC）的阴极。采用静电纺丝工艺制备SCFG纤维。在对称电池中，将SmCeO（SDC）纳米颗粒渗透到多孔纤维状SCFG阴极层中，该阴极层已涂覆在SDC致密电解质上。电化学阻抗谱（EIS）分析表明，具有纤维形态的SCFG阴极的极化电阻明显低于具有粉末形态的相同组合的极化电阻。此外，研究表明SDC氧离子导体纳米颗粒的渗透提高了电化学性能。含14 wt% SDC纳米颗粒的纤维结构的SCFG在800℃时获得了最低的极化电阻值，为0.03Ω·cm。
