Influence of the La0.2Sr0.7Ti0.95Ni0.05O3 (LSTN) Synthesis Method on SOFC Anode Performance

IF 4.3 3区 材料科学 Q1 ENGINEERING, ELECTRICAL & ELECTRONIC
Moran Dahan, L. Fadeev, Hagay Hayun, M. Gozin, Y. Gelbstein, B. A. Rosen
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引用次数: 0

Abstract

Solid oxide fuel cells are characterized by a high efficiency for converting chemical energy into electricity and fuel flexibility. This research work focuses on developing durable and efficient anodes for solid oxide fuel cells (SOFCs) based on exsolving nickel from the perovskite structure. A-site-deficient La- and Ni-doped strontium titanates (La0.2Sr0.7Ti0.95Ni0.05O3−δ, LSTN) were synthesized using four different techniques and mixed with Ce0.8Gd0.2O2−δ (GDC) to form the SOFC anode. The synthesis routes of interest for comparison included solid-state, sol-gel, hydrothermal, and co-precipitation methods. LSTN powders were characterized via XRD, SEM, TPR, BET and XPS. In situ XRD during reduction was measured and the reduced powders were analyzed using TEM. The impact of synthesis route on SOFC performance was investigated. All samples were highly durable when kept at 0.5 V for 48 h at 800 °C with H2 fuel. Interestingly, the best performance was observed for the cell with the LSTN anode prepared via co-precipitation, while the conventional solid-state synthesis method only achieved the second-best results.
La0.2Sr0.7Ti0.95Ni0.05O3 (LSTN) 合成方法对 SOFC 阳极性能的影响
固体氧化物燃料电池的特点是能高效地将化学能转化为电能和燃料的灵活性。这项研究工作的重点是开发基于从过氧化物结构中溶解镍的耐用、高效的固体氧化物燃料电池(SOFC)阳极。研究人员采用四种不同的技术合成了 A-位缺陷的 La 和 Ni- 掺杂锶钛酸盐(La0.2Sr0.7Ti0.95Ni0.05O3-δ,LSTN),并与 Ce0.8Gd0.2O2-δ (GDC)混合形成 SOFC 阳极。比较感兴趣的合成路线包括固态法、溶胶-凝胶法、水热法和共沉淀法。通过 XRD、SEM、TPR、BET 和 XPS 对 LSTN 粉末进行了表征。对还原过程中的原位 XRD 进行了测量,并使用 TEM 对还原后的粉末进行了分析。研究了合成路线对 SOFC 性能的影响。在使用 H2 燃料的情况下,所有样品在 800 °C、0.5 V 电压下保持 48 小时后都具有很高的耐久性。有趣的是,通过共沉淀制备的 LSTN 阳极电池的性能最好,而传统固态合成方法只能达到第二好的结果。
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来源期刊
CiteScore
7.20
自引率
4.30%
发文量
567
期刊介绍: ACS Applied Electronic Materials is an interdisciplinary journal publishing original research covering all aspects of electronic materials. The journal is devoted to reports of new and original experimental and theoretical research of an applied nature that integrate knowledge in the areas of materials science, engineering, optics, physics, and chemistry into important applications of electronic materials. Sample research topics that span the journal's scope are inorganic, organic, ionic and polymeric materials with properties that include conducting, semiconducting, superconducting, insulating, dielectric, magnetic, optoelectronic, piezoelectric, ferroelectric and thermoelectric. Indexed/​Abstracted: Web of Science SCIE Scopus CAS INSPEC Portico
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