Optimizing Anode Performance of (La,Sr)1-αTi1-βNiβO3-δ in Solid Oxide Fuel Cells via Synergistic A-site Deficiency and B-site Doping Regulation Strategy

IF 5.5 3区材料科学 Q1 ELECTROCHEMISTRY

Electrochimica Acta Pub Date : 2024-11-28 DOI:10.1016/j.electacta.2024.145424

Rui Ling, Chenxiao Meng, Wenyun Wang, Chao Yang, Wentao Qi

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引用次数: 0

Abstract

This study introduces an innovative approach to enhance the electrochemical performance of La-substituted SrTiO₃ anode materials in solid oxide fuel cells (SOFCs) through the strategic combination of A-site deficiency and B-site doping. The effective method leverages the synergistic effects of A-site deficiency and B-site doping on Ni in situ exsolution and the electrochemical behavior of the SOFCs. The tailored (La,Sr)_1-αTi_1-βNi_βO_3-δ (α=0.2, β=0.15, (LS)_0.8TN_0.15) anode, modified with Ni nanoparticles, significantly boosts the power output of YSZ-supported single cells, achieving peak power densities of 720.5, 535.8, and 376.3 mW cm^-2 at 800, 700, and 600°C, respectively, under a humidified hydrogen atmosphere (3% H₂O-97% H₂). The findings underscore the pivotal role of optimized A-site deficiency and B-site doping in fine-tuning the morphology and dispersion of Ni nanoparticles, thereby markedly enhancing the catalytic activity and the overall electrochemical efficiency of the electrodes. These results indicate the promising candidacy of (La,Sr)_1-αTi_1-βNi_βO_3-δ as an anode material for SOFCs, opening new avenues for the design of high-performance fuel cell components.

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通过 A 位缺失和 B 位掺杂协同调节策略优化固体氧化物燃料电池中 (La,Sr)1-αTi1-βNiβO3-δ 的阳极性能

本研究介绍了一种创新方法，即通过 A 位缺失和 B 位掺杂的策略组合来提高固体氧化物燃料电池 (SOFC) 中 La 取代 SrTiO3 阳极材料的电化学性能。这种有效的方法利用了 A 位缺陷和 B 位掺杂对镍原位溶解和 SOFC 电化学行为的协同效应。用镍纳米颗粒修饰的定制 (La,Sr)1-αTi1-βNiβO3-δ （α=0.2，β=0.15，(LS)0.8TN0.15）阳极显著提高了 YSZ 支持的单电池的功率输出，在 800、700 和 600°C 的加湿氢气环境（3% H2O-97% H2）下，峰值功率密度分别达到 720.5、535.8 和 376.3 mW cm-2。这些发现强调了优化的 A 位缺陷和 B 位掺杂在微调镍纳米粒子的形态和分散性方面的关键作用，从而显著提高了电极的催化活性和整体电化学效率。这些结果表明，(La,Sr)1-αTi1-βNiβO3-δ有望成为 SOFCs 的阳极材料，为设计高性能燃料电池组件开辟了新的途径。

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

Electrochimica Acta 工程技术-电化学

CiteScore

11.30

自引率

6.10%

发文量

1634

审稿时长

41 days

期刊介绍： Electrochimica Acta is an international journal. It is intended for the publication of both original work and reviews in the field of electrochemistry. Electrochemistry should be interpreted to mean any of the research fields covered by the Divisions of the International Society of Electrochemistry listed below, as well as emerging scientific domains covered by ISE New Topics Committee.