Effective Promotion of the Activity and Stability of Cathodes for Protonic Ceramic Fuel Cells

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‐catal...

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Veröffentlicht in:Advanced functional materials 2024-08, Vol.34 (33), p.n/a
Hauptverfasser: Gao, Hui, He, Fan, Zhu, Feng, Xia, Jiaojiao, Du, Zhiwei, Huang, Yixuan, Zhu, Liangzhu, Chen, Yu
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container_issue 33
container_start_page
container_title Advanced functional materials
container_volume 34
creator Gao, Hui
He, Fan
Zhu, Feng
Xia, Jiaojiao
Du, Zhiwei
Huang, Yixuan
Zhu, Liangzhu
Chen, Yu
description 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 Pr0.2Ce0.2Ni0.2Co0.2Fe0.2Ox (denoted as PCNCFO) is designed and reported, which significantly enhanced the ORR activity and durability of a typical PrBaCo2O5+δ (PBC) cathode. The PCNCFO‐coated PBC cathode delivered impressive cell performance with a small polarization resistance of only 0.18 Ω cm2 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. A multi‐cationic oxide nano‐catalyst‐coated Pr0.2Ce0.2Ni0.2Co0.2Fe0.2Ox‐PrBaCo2O5+δ (PCNCFO‐PBC) cathode are developed for protonic ceramic fuel cells. The PCNCFO‐coated PBC cathode delivers decent electrochemical activity and favorable operational durability.
doi_str_mv 10.1002/adfm.202401747
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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 Pr0.2Ce0.2Ni0.2Co0.2Fe0.2Ox (denoted as PCNCFO) is designed and reported, which significantly enhanced the ORR activity and durability of a typical PrBaCo2O5+δ (PBC) cathode. The PCNCFO‐coated PBC cathode delivered impressive cell performance with a small polarization resistance of only 0.18 Ω cm2 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. A multi‐cationic oxide nano‐catalyst‐coated Pr0.2Ce0.2Ni0.2Co0.2Fe0.2Ox‐PrBaCo2O5+δ (PCNCFO‐PBC) cathode are developed for protonic ceramic fuel cells. 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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. A multi‐cationic oxide nano‐catalyst‐coated Pr0.2Ce0.2Ni0.2Co0.2Fe0.2Ox‐PrBaCo2O5+δ (PCNCFO‐PBC) cathode are developed for protonic ceramic fuel cells. 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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 Pr0.2Ce0.2Ni0.2Co0.2Fe0.2Ox (denoted as PCNCFO) is designed and reported, which significantly enhanced the ORR activity and durability of a typical PrBaCo2O5+δ (PBC) cathode. The PCNCFO‐coated PBC cathode delivered impressive cell performance with a small polarization resistance of only 0.18 Ω cm2 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. 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subjects Catalysts
Cathodes
Cathodic polarization
Chemical reduction
Commercialization
Durability
Electrode polarization
Electrons
Fuel cells
infiltration
multi‐cation oxide nano‐catalyst
oxygen reduction reaction
Oxygen reduction reactions
protonic ceramic fuel cells
Relaxation time
Surface stability
title Effective Promotion of the Activity and Stability of Cathodes for Protonic Ceramic Fuel Cells
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