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Compatibility study of La2NiO4+δ and La2Mo1.5W0.5O9 as electrode-electrolyte material for solid oxide fuel cell
Journal of Electron Spectroscopy and Related Phenomena ( IF 1.8 ) Pub Date : 2021-05-28 , DOI: 10.1016/j.elspec.2021.147087
Siddharth Singh , Anjan Sil , Sandip Bysakh

The present work investigates the chemical compatibility of La2NiO4+δ (LN) and La2Mo1.5W0.5O9 (W-LMO) as cathode/electrolyte and NiWO4 (NW)/La2Mo2O9 (LMO) as anode/electrolyte material for solid oxide fuel cell (SOFC) application respectively. The x- ray diffraction (XRD) study of LN/W-LMO shows the existence of five phases viz., La2NiO4+δ, La2Mo1.5W0.5O9, NiWO4, NiO and La1.77Mo1.77O8.001. Whereas, the XRD analysis of NW/LMO shows the formation of NiO, higher order molybdates viz., La5Mo4O14 and La12Mo6O35 as a result of partial Mo reduction. The formation of NiWO4 as a secondary phase in La2NiO4+δ / La2Mo1.5W0.5O9 is a potential anode material which is studied with La2Mo2O9 as anode/electrolyte by x-ray photoelectron spectroscopy (XPS). The XPS analysis of NW/LMO in Ar-H2 atmosphere reveals the partial reduction of Mo to lower oxidation states. The presence of NiWO4 is also verified by Raman spectroscopy with peaks at 698, 778 and 891 cm−1 with the signatures of W-LMO and Mo-O bonding.



中文翻译:

La 2 NiO 4+δ与La 2 Mo 1.5 W 0.5 O 9作为固体氧化物燃料电池电极电解质材料的相容性研究

目前的工作研究了作为阴极/电解质的 La 2 NiO 4+δ (LN) 和 La 2 Mo 1.5 W 0.5 O 9 (W-LMO) 与 NiWO 4 (NW)/La 2 Mo 2 O 9 (LMO )的化学相容性。) 分别作为固体氧化物燃料电池 (SOFC) 应用的阳极/电解质材料。LN/W-LMO 的 X 射线衍射 (XRD) 研究表明存在五个相,即 La 2 NiO 4+δ、La 2 Mo 1.5 W 0.5 O 9、NiWO 4、NiO 和 La 1.771.77 O 8.001。而 NW/LMO 的 XRD 分析表明,由于部分 Mo 还原,形成了 NiO、高级钼酸盐,即 La 5 Mo 4 O 14和 La 12 Mo 6 O 35。在 La 2 NiO 4+δ / La 2 Mo 1.5 W 0.5 O 9 中形成作为第二相的 NiWO 4是与 La 2 Mo 2 O 9一起研究的潜在负极材料通过 X 射线光电子能谱 (XPS) 作为阳极/电解质。NW/LMO 在 Ar-H 2气氛中的 XPS 分析显示 Mo 部分还原为较低的氧化态。NiWO 4的存在也通过拉曼光谱证实,在698、778和891 cm -1处具有峰,具有W-LMO和Mo-O键合的特征。

更新日期:2021-06-01
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