Anelli Simone, Moreno-Sanabria Luis, Baiutti Federico, Torrell Marc, Tarancón Albert
Department of Advanced Materials for Energy, Catalonia Institute for Energy Research (IREC), Jardins de les Dones de Negre, 1, Sant Adrià de Besòs, 08930 Barcelona, Spain.
Institute of Ceramics and Glass (ICV-CSIC), Kelsen 5, 28049 Madrid, Spain.
Nanomaterials (Basel). 2021 Dec 18;11(12):3435. doi: 10.3390/nano11123435.
The enhancement of solid oxide cell (SOC) oxygen electrode performance through the generation of nanocomposite electrodes via infiltration using wet-chemistry processes has been widely studied in recent years. An efficient oxygen electrode consists of a porous backbone and an active catalyst, which should provide ionic conductivity, high catalytic activity and electronic conductivity. Inkjet printing is a versatile additive manufacturing technique, which can be used for reliable and homogeneous functionalization of SOC electrodes via infiltration for either small- or large-area devices. In this study, we implemented the utilization of an inkjet printer for the automatic functionalization of different gadolinium-doped ceria scaffolds, via infiltration with ethanol:water-based LaSrCoFeO (LSCF) ink. Scaffolds based on commercial and mesoporous Gd-doped ceria (CGO) powders were used to demonstrate the versatility of inkjet printing as an infiltration technique. Using yttrium-stabilized zirconia (YSZ) commercial electrolytes, symmetrical LSCF/LSCF-CGO/YSZ/LSCF-CGO/LSCF cells were fabricated via infiltration and characterized by SEM-EDX, XRD and EIS. Microstructural analysis demonstrated the feasibility and reproducibility of the process. Electrochemical characterization lead to an value of ≈1.2 Ω cm at 750 °C, in the case of nanosized rare earth-doped ceria scaffolds, with the electrode contributing ≈0.18 Ω cm. These results demonstrate the feasibility of inkjet printing as an infiltration technique for SOC fabrication.
近年来，通过湿化学工艺浸润制备纳米复合电极来提高固体氧化物电池（SOC）氧电极性能的研究已广泛开展。高效的氧电极由多孔骨架和活性催化剂组成，应具备离子导电性、高催化活性和电子导电性。喷墨打印是一种通用的增材制造技术，可通过浸润用于可靠且均匀地对SOC电极进行功能化，适用于小面积或大面积器件。在本研究中，我们利用喷墨打印机通过用乙醇：水基的LaSrCoFeO（LSCF）墨水浸润，对不同的钆掺杂二氧化铈支架进行自动功能化。基于商业和介孔钆掺杂二氧化铈（CGO）粉末的支架被用于展示喷墨打印作为一种浸润技术的通用性。使用钇稳定氧化锆（YSZ）商业电解质，通过浸润制备对称的LSCF/LSCF-CGO/YSZ/LSCF-CGO/LSCF电池，并通过扫描电子显微镜-能谱仪（SEM-EDX）、X射线衍射仪（XRD）和电化学阻抗谱（EIS）进行表征。微观结构分析证明了该工艺的可行性和可重复性。在750℃下，对于纳米尺寸的稀土掺杂二氧化铈支架，电化学表征得到的 值约为1.2Ω·cm，其中电极贡献约为0.18Ω·cm。这些结果证明了喷墨打印作为一种用于SOC制造的浸润技术的可行性。
