Improved Electrochemical Performance of Sm0.2Ce0.8O1.9 (SDC) Nanoparticles Decorated SrCo0.8Fe0.1Ga0.1O3-δ (SCFG) Fiber, Fabricated by Electrospinning, for IT-SOFCs Cathode Application

Marzieh Kiani; Mohammad Hossein Paydar

doi:10.3390/ma16010399

Improved Electrochemical Performance of Sm_0.2Ce_0.8O_1.9 (SDC) Nanoparticles Decorated SrCo_0.8Fe_0.1Ga_0.1O_3-δ (SCFG) Fiber, Fabricated by Electrospinning, for IT-SOFCs Cathode Application

Materials (Basel). 2023 Jan 1;16(1):399. doi: 10.3390/ma16010399.

Authors

Marzieh Kiani¹, Mohammad Hossein Paydar¹

Affiliation

¹ Department of Materials Science and Engineering, School of Engineering, Shiraz University, Shiraz 71348-51154, Iran.

Abstract

This paper examines the electrochemical and microstructural features of SrCo_0.8Fe_0.1Ga_0.1O_3-δ (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, Sm_0.2Ce_0.8O_1.9 (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 cm² at 800 °C, is attained by the SCFG with a fibrous structure containing 14 wt% SDC nanoparticles.

Keywords: SCFG; cathode; electrospinning; infiltration; solid oxide fuel cells.

Grants and funding

ENG-1397/Shiraz University