A Low-Lewis-Acid-Strength Cation Cs+-doped Double Perovskite for Fast and Durable Oxygen Reduction/evolutions on Protonic Ceramic Cells

Yangsen Xu, Kang Xu, Feng Zhu, Fan He, Hua Zhang, Chuanyu Fang, Ying Liu*, Yucun Zhou, YongMan Choi, Yu Chen*

*此作品的通信作者

研究成果: Article同行評審

8 引文 斯高帕斯(Scopus)

摘要

Improving the reaction kinetics and durability of air electrodes on protonic ceramic cells is effective for their commercialization but challenging. Here, we report our electrode design via a low-Lewis-acid-strength cation (Cs+) doping strategy on a double perovskite oxide with a detailed formula of PrBa0.9Cs0.1Co2O5+δ (PBCsC). At 600 °C, the PBCsC electrode demonstrates a low area-specific resistance (ASR) value of 0.3 Ω cm2 within 100 h without significant degradation due likely to the electron pair shift by the polarization distribution of ionic Lewis acid strength at A and B sites. At 650 °C, a full cell with the PBCsC electrode displays an encouraging peak power density of 1.66 W cm–2 in the fuel cell (FC) mode, a high current density of −2.85 A cm–2 (at 1.3 V) in the electrolysis (EC) mode, good operational stability in dual modes of FC and EC, and promising cycling durability of 20 cycles in ∼80 h.
原文American English
頁(從 - 到)4145–4155
期刊ACS Energy Letters
8
DOIs
出版狀態Published - 13 9月 2023

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