Sn-doped Ruddlesden-Popper structured LNO oxide as an effective cathode for proton-conducting solid oxide fuel cells

IF 8.3 2区工程技术 Q1 CHEMISTRY, PHYSICAL

International Journal of Hydrogen Energy Pub Date : 2024-10-29 DOI:10.1016/j.ijhydene.2024.10.320

Mingming Zhang, Xiangbo Deng, Min Fu, Zetian Tao

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引用次数: 0

Abstract

Proton-conducting solid oxide fuel cells (H–SOFCs) are promising devices for efficient chemical-to-electrical energy conversion at low temperatures. Extensive research has focused on enhancing the catalytic activity of cathodes. In this study, we employ a Sn doping strategy to modify the Ruddlesden-Popper structured La₂NiO_4+δ (LNO) cathode. Experimental results demonstrate that Sn doping significantly improve the oxygen reduction reaction (ORR) activity and protonation capability of the cathode. First-principles calculations further reveal that the La₂Ni_1-xSn_xO_4+δ (LNSOx) cathode exhibits a lower oxygen vacancy formation energy compared to bare LNO. The peak power density of H–SOFCs with Sn-doped LNO reaches 1563 mW cm⁻² at 700 °C, notably higher than previously reported LNO-based H–SOFCs. These findings confirm the potential of Sn-doped LNO as an effective cathode material for H–SOFCs.

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掺杂锡的 Ruddlesden-Popper 结构 LNO 氧化物作为质子传导型固体氧化物燃料电池的有效阴极

质子传导固体氧化物燃料电池（H-SOFCs）是在低温条件下实现高效化学能-电能转换的理想设备。大量研究集中于提高阴极的催化活性。在本研究中，我们采用了掺杂锡的策略来改进 Ruddlesden-Popper 结构的 La2NiO4+δ (LNO) 阴极。实验结果表明，锡掺杂能显著提高阴极的氧还原反应（ORR）活性和质子化能力。第一性原理计算进一步表明，与裸 LNO 相比，La2Ni1-xSnxO4+δ（LNSOx）阴极具有更低的氧空位形成能。使用掺锡 LNO 的 H-SOFC 在 700 °C 时的峰值功率密度达到 1563 mW cm-2，明显高于之前报道的基于 LNO 的 H-SOFC。这些发现证实了掺锡 LNO 作为 H-SOFCs 有效阴极材料的潜力。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

International Journal of Hydrogen Energy 工程技术-环境科学

CiteScore

13.50

自引率

25.00%

发文量

3502

审稿时长

60 days

期刊介绍： The objective of the International Journal of Hydrogen Energy is to facilitate the exchange of new ideas, technological advancements, and research findings in the field of Hydrogen Energy among scientists and engineers worldwide. This journal showcases original research, both analytical and experimental, covering various aspects of Hydrogen Energy. These include production, storage, transmission, utilization, enabling technologies, environmental impact, economic considerations, and global perspectives on hydrogen and its carriers such as NH3, CH4, alcohols, etc. The utilization aspect encompasses various methods such as thermochemical (combustion), photochemical, electrochemical (fuel cells), and nuclear conversion of hydrogen, hydrogen isotopes, and hydrogen carriers into thermal, mechanical, and electrical energies. The applications of these energies can be found in transportation (including aerospace), industrial, commercial, and residential sectors.