Authors
Yu Chen, Yan Chen, Dong Ding, Yong Ding, YongMan Choi, Lei Zhang, Seonyoung Yoo, Dongchang Chen, Ben Deglee, Han Xu, Qiyang Lu, Bote Zhao, Gulin Vardar, Jiayue Wang, Hendrik Bluhm, Ethan J Crumlin, Chenghao Yang, Jiang Liu, Bilge Yildiz, Meilin Liu
Publication date
2017
Journal
Energy & Environmental Science
Volume
10
Issue
4
Pages
964-971
Publisher
Royal Society of Chemistry
Description
The sluggish oxygen reduction reaction (ORR) greatly reduces the energy efficiency of solid oxide fuel cells (SOFCs). Here we report our findings in dramatically enhancing the ORR kinetics and durability of the state-of-the-art La0.6Sr0.4Co0.2Fe0.8O3 (LSCF) cathode using a hybrid catalyst coating composed of a conformal PrNi0.5Mn0.5O3 (PNM) thin film with exsoluted PrOx nanoparticles. At 750 °C, the hybrid catalyst-coated LSCF cathode shows a polarization resistance of ∼0.022 Ω cm2, about 1/6 of that for a bare LSCF cathode (∼0.134 Ω cm2). Further, anode-supported cells with the hybrid catalyst-coated LSCF cathode demonstrate remarkable peak power densities (∼1.21 W cm−2) while maintaining excellent durability (0.7 V for ∼500 h). Near Ambient X-ray Photoelectron Spectroscopy (XPS) and Near Edge X-Ray Absorption Fine Structure (NEXAFS) analyses, together with density functional theory …
Total citations
20172018201920202021202220232024533352832433829
Scholar articles
Y Chen, Y Chen, D Ding, Y Ding, YM Choi, L Zhang… - Energy & Environmental Science, 2017