Solís Cecilia, Balaguer María, Serra José M
Instituto de Tecnología Química, Universitat Politècnica de València-Consejo Superior de Investigaciones Científicas, Avenida de los Naranjos s/n, 46022 Valencia, Spain.
Heinz Maier-Leibnitz Zentrum (MLZ), TU München, Lichtenbergstr. 1, 85748 Garching, Germany.
Membranes (Basel). 2020 Jul 10;10(7):148. doi: 10.3390/membranes10070148.
The particular operational conditions of electrochemical cells make the simultaneous characterization of both structural and transport properties challenging. The rapidity and flexibility of the acquisition of Raman spectra places this technique as a good candidate to measure operating properties and changes. Raman spectroscopy has been applied to well-known lanthanide ceria materials and the structural dependence on the dopant has been extracted. The evolution of Pr-doped ceria with temperature has been recorded by means of a commercial cell showing a clear increment in oxygen vacancies concentration. To elucidate the changes undergone by the electrolyte or membrane material in cell operation, the detailed construction of a homemade Raman cell is reported. The cell can be electrified, sealed and different gases can be fed into the cell chambers, so that the material behavior in the reaction surface and species evolved can be tracked. The results show that the Raman technique is a feasible and rather simple experimental option for operating characterization of solid-state electrochemical cell materials, although the treatment of the extracted data is not straightforward.
电化学电池的特定操作条件使得同时表征结构和传输特性具有挑战性。拉曼光谱采集的快速性和灵活性使其成为测量操作特性和变化的良好候选技术。拉曼光谱已应用于著名的镧系二氧化铈材料，并提取了其对掺杂剂的结构依赖性。通过一个商用电池记录了掺镨二氧化铈随温度的变化，结果显示氧空位浓度明显增加。为了阐明电池运行过程中电解质或膜材料所经历的变化，本文报道了一种自制拉曼电池的详细构造。该电池可以通电、密封，并且可以将不同的气体通入电池腔室，从而能够追踪反应表面的材料行为和析出的物种。结果表明，拉曼技术是用于固态电化学电池材料操作表征的一种可行且相当简单的实验选择，尽管对提取数据的处理并不简单。
