Praseodymium-Cerium Oxide-Infiltrated Perovskite Cathode with Superior Electrochemical Performance for Solid Oxide Fuel Cells

Hao-Yang Li; Jiyoon Shin; Yujie Wu; Pei-Chen Su

doi:10.1021/acs.nanolett.4c02399

Praseodymium-Cerium Oxide-Infiltrated Perovskite Cathode with Superior Electrochemical Performance for Solid Oxide Fuel Cells

Nano Lett. 2024 Oct 31. doi: 10.1021/acs.nanolett.4c02399. Online ahead of print.

Authors

Hao-Yang Li¹, Jiyoon Shin¹, Yujie Wu^{1

2}, Pei-Chen Su¹

Affiliations

¹ School of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798.
² School of Physics, Harbin Institute of Technology, 92 Xi Dazhi Street, Harbin, Heilongjiang 150001, P. R. China.

PMID: 39480024
DOI: 10.1021/acs.nanolett.4c02399

Abstract

This study presents a high-performance solid oxide fuel cell employing a perovskite cathode, strontium iron molybdenum oxide [Sr₂Fe_1.5Mo_0.5O_6-δ (SFM)], infiltrated with praseodymium-cerium oxide [Pr_0.2Ce_0.8O_2-δ (PCO)], a fluorite. This infiltration notably enhances the oxygen reduction reaction kinetics and long-term stability. Evidence of enhanced stability is seen through minimized impedance degradation over 50 h. Furthermore, PCO infiltration improves the cathode's resistance to chromium poisoning by suppressing strontium degradation. Compared to the bare SFM cathode, the PCO-infiltrated SFM composite cathode doubles the cell's power density at 800 °C.

Keywords: perovskite cathode; praseodymium−cerium oxide (PCO); solid oxide fuel cells; strontium iron molybdenum oxide (SFM); strontium surface segregation; surface oxygen exchange.