高熵设计 Ruddlesden-Popper 结构 LNO 以提高质子固体氧化物燃料电池的性能

IF 6.7 1区工程技术 Q2 ENERGY & FUELS

Fuel Pub Date : 2024-10-17 DOI:10.1016/j.fuel.2024.133430

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引用次数: 0

摘要

原生陶瓷燃料电池（PCFC）是一种能在低温条件下将化学能有效转化为电能的装置。人们一直致力于开发催化活性更强的阴极。在这项工作中，在具有 R-P 结构的 La2NiO4+δ (LNO) 的 A 位采用了高熵方法，从而合成了 LaPr0.2Sm0.2Ba0.2Sr0.2Ca0.2NiO4+δ (HE-LPSBSCN) 阴极。一系列综合测试表明，这种高熵策略提高了 LNO 的氧还原反应（ORR）活性、水合行为、良好的运行稳定性和电子导电性。HE-LPSBSCN 阴极的性能打破了记录，在 700 °C 时达到了 2004 mW cm-2 的最大功率密度。这一发现为合理设计和优化 PCFC 的高催化活性阴极提供了新的思路。

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High-entropy design of Ruddlesden-Popper structured LNO for enhanced performance in proton solid oxide fuel cells

Protionic Ceramic Fuel Cells (PCFCs) are devices that efficiently convert chemical energy to electrical energy at low temperatures. Significant research efforts have been directed towards the development of cathodes with enhanced catalytic activity. In this work, a high-entropy approach was employed at the A site of La₂NiO_4+δ (LNO) with a Ruddlesden-Popper (R-P) structure, resulting in the synthesis of the LaPr_0.2Sm_0.2Ba_0.2Sr_0.2Ca_0.2NiO_4+δ (HE-LPSBSCN) cathode. A comprehensive series of tests demonstrated that this high-entropy strategy improved the oxygen reduction reaction (ORR) activity, hydration behavior, well operational stability, and electronic conductivity of LNO. The HE-LPSBSCN cathode demonstrated record-breaking performance, achieving a maximum power density of 2004 mW cm⁻² at 700 °C. This finding provides novel insights for the rational design and optimization of highly catalytically active cathodes for PCFCs.

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来源期刊

Fuel 工程技术-工程：化工

CiteScore

12.80

自引率

20.30%

发文量

3506

审稿时长

64 days

期刊介绍： The exploration of energy sources remains a critical matter of study. For the past nine decades, fuel has consistently held the forefront in primary research efforts within the field of energy science. This area of investigation encompasses a wide range of subjects, with a particular emphasis on emerging concerns like environmental factors and pollution.