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DOI	10.1039/d0ee02799e
	Transition from perovskite to misfit-layered structure materials: A highly oxygen deficient and stable oxygen electrode catalyst
	Saqib M.; Choi I.-G.; Bae H.; Park K.; Shin J.-S.; Kim Y.-D.; Lee J.-I.; Jo M.; Kim Y.-C.; Lee K.-S.; Song S.-J.; Wachsman E.D.; Park J.-Y.
发表日期	2021
ISSN	17545692
起始页码	2472
结束页码	2484
卷号	14 期号:4
英文摘要	Despite the recent substantial progress in reversible protonic ceramic cells (RPCCs) it remains essential to further develop oxygen electrode materials that show superior activity and stability for oxygen reduction and evolution reactions due to the intrinsically sluggish kinetics of oxygen electrode reactions at lower temperature (<700 °C). We report a novel misfit-layered compound Gd0.3Ca2.7Co3.82Cu0.18O9-δ (GCCCO) as a superior and durable bifunctional oxygen electrode material for RPCCs. The maximum power densities achieved with GCCCO cells are notably high, reaching 1.16 and 2.05 W cm-2 at 600 and 700 °C, respectively, in the fuel cell mode, surpassing previously reported results. Moreover, in the electrolysis mode, the GCCCO cells reached current densities of -1.53 and -9.35 A cm-2 at 500 and 700 °C, respectively, at an applied voltage of 1.5 V. The superior catalytic performances of GCCCO are correlated to the oxygen defect rich structure, triple (O2-/H+/e-)-conducting property, needle-like grain morphology, and suitable thermal expansion coefficient. This journal is © The Royal Society of Chemistry.
英文关键词	Copper compounds; Electrolytic reduction; Fuel cells; Gadolinium compounds; Oxygen; Perovskite; Thermal expansion; Bifunctional oxygen electrodes; Catalytic performance; Conducting properties; Layered Structures; Maximum power density; Misfit-layered compound; Oxygen reduction and evolution reactions; Thermal expansion coefficients; Electrodes; catalyst; electrode; oxygen; perovskite
语种	英语
来源期刊	Energy & Environmental Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/190724
作者单位	HMC, Department of Nanotechnology and Advanced Materials Engineering, Sejong University, Seoul, 05006, South Korea; School of Energy Materials and Chemical Engineering, Korea University of Technology and Education, Cheonan, 31253, South Korea; Department of Materials Science and Engineering, Chonnam National University, Gwangju, 61186, South Korea; Pohang Accelerator Laboratory, Pohang, 37673, South Korea; Maryland Energy Innovation Institute, Department of Materials Science and Engineering, University of Maryland, College Park, MD 20742, United States
推荐引用方式 GB/T 7714	Saqib M.,Choi I.-G.,Bae H.,et al. Transition from perovskite to misfit-layered structure materials: A highly oxygen deficient and stable oxygen electrode catalyst[J],2021,14(4).
APA	Saqib M..,Choi I.-G..,Bae H..,Park K..,Shin J.-S..,...&Park J.-Y..(2021).Transition from perovskite to misfit-layered structure materials: A highly oxygen deficient and stable oxygen electrode catalyst.Energy & Environmental Science,14(4).
MLA	Saqib M.,et al."Transition from perovskite to misfit-layered structure materials: A highly oxygen deficient and stable oxygen electrode catalyst".Energy & Environmental Science 14.4(2021).