Nanofiber Sr2Fe1.5Mo0.5O6-δ Electrodes Fabricated by the Electrospinning Method for Solid-Oxide Cells
Nanofiber Sr2Fe1.5Mo0.5O6-δ Electrodes Fabricated by the Electrospinning Method for Solid-Oxide Cells
复制标题
静电纺丝法制备固体氧化物电池纳米纤维Sr2Fe1.5Mo0.5O6-δ电极
DOI：
10.3390/cryst12111624
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发表时间：
2022-11
期刊：
影响因子：
2.7
通讯作者：
Shaorong Wang
中科院分区：
文献类型：
--
作者：
Bo Zhang;Zhizhong Leng;Yihan Ling;Hu Bai;Sha Li;Juan Zhou;Shaorong Wang
固体氧化物电池（SOCs）作为一种有前途的能量转换和存储器件正受到越来越多的关注。优化固体氧化物电池性能的挑战之一是在电极体中没有足够的三相边界（TPB）。为了提高SOC的反应面积，采用静电纺丝法制备了Sr 2Fe 1. 5 Mo 0. 5 O 6-δ纳米纤维，并将其用于在湿空气和氢气气氛下工作的SOC电极。通过XRD分析和SEM观察，SFMO纳米纤维显示出高度多孔和结晶的钙钛矿结构和连续的通道。烧结后SFMO纳米纤维的平均直径为约100 nm。采用SFMO电极的La0.8Sr0.2Ga0.8Mg0.2O3-δ（LSGM）电解质支撑对称电池在潮湿空气和H2气氛中表现出增强的电化学性能。利用弛豫时间分布法对交流阻抗谱进行了分析，并将所观察到的极化峰归属于不同的电化学过程。结果表明，具有改进的纳米结构的SFMO纳米粒子可以作为SOC电极的潜在材料。
Solid oxide cells (SOCs) are attracting much more attention as promising energy conversion and storage devices. One of the challenges of optimizing of solid-oxide cells’ performance is that there are not enough triple-phase boundaries (TPB) in the electrode bulk. To enhance the reaction area for SOCs, Sr2Fe1.5Mo0.5O6-δ nanofibers are synthesized by electrospinning with metal nitrate precursors and used for SOC electrodes operated in both humidified air and a hydrogen atmosphere. SFMO nanofibers display a highly porous and crystallized perovskite structure and continuous pathways by XRD analysis and SEM observation. The average diameter of the SFMO nanofibers after sintering is about 100 nm. The La0.8Sr0.2Ga0.8Mg0.2O3-δ(LSGM) electrolyte-supported symmetrical cell with the SFMO nanofiber electrode exhibits enhanced electrochemical performance in humidified air and an H2 atmosphere. Moreover, a distribution of the relaxation time method is used to analyze the impedance spectra, and the polarization peaks observed are assigned to correspond different electrochemical processes. The results indicate that the SFMO nanofiber with an improved nanostructure can be the potential material for the SOC electrode.