材料科学
陶瓷
阴极
晋升(国际象棋)
燃料电池
化学工程
纳米技术
复合材料
物理化学
化学
政治
政治学
法学
工程类
作者
Hui Gao,Fan He,Feng Zhu,Jiaojiao Xia,Zhiwei Du,Yixuan Huang,Liangzhu Zhu,Yu Chen
标识
DOI:10.1002/adfm.202401747
摘要
Abstract Protonic ceramic fuel cells (PCFCs) are emerging as effective devices for their excellent capability of converting energy. However, the sluggish oxygen reduction reaction (ORR) and poor durability of cathodes greatly limit their widespread commercialization. Herein, a multi‐cationic oxide nano‐catalyst with a nominal composition of Pr 0.2 Ce 0.2 Ni 0.2 Co 0.2 Fe 0.2 O x (denoted as PCNCFO) is designed and reported, which significantly enhanced the ORR activity and durability of a typical PrBaCo 2 O 5+δ (PBC) cathode. The PCNCFO‐coated PBC cathode delivered impressive cell performance with a small polarization resistance of only 0.18 Ω cm 2 at 600 °C on symmetrical cells and a high peak power density (PPD) of 1.31 W cm −2 at 650 °C on single cells. Meanwhile, the PCNCFO‐coated PBC cathode exhibits excellent operational stability both on symmetrical and single cells. It is indicated that the Ce oxide in the nano‐catalyst coating can react with the segregated Ba to form active species, while others can activate the surface of the cathode, as indicated by the transmission electron microscope (TEM) and distribution of relaxation time (DRT) analyses.
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