College of Materials Science and Engineering, Fuzhou University, Fuzhou, Fujian 350108, China.
Department of Chemical Engineering, Monash University, Clayton, Victoria 3800, Australia.
ACS Appl Mater Interfaces. 2023 Feb 15;15(6):8120-8127. doi: 10.1021/acsami.2c20974. Epub 2023 Feb 3.
Nanofibers have great promise as a highly active air electrode for reversible solid oxide cells (ReSOCs); however, one thorny issue is how to adhesively stick nanofibers to electrolyte with no damage to the original morphology. Herein, PrBaCaCoO (PBCC) nanofibers are applied as an air electrode by a facile direct assembly approach that leads to the retention of most of the unique microstructure of nanofibers, and firm adhesion of the nanofiber electrode onto the electrolyte is achieved by applying electrochemical polarization. A single cell with the PBCC nanofiber air electrode exhibits excellent maximum power density (1.97 W cm), electrolysis performance (1.3 A cm at 1.3 V), and operating stability at 750 °C for 200 h. These findings provide a facile means for the utilization of nanofiber electrodes for high-performance and durable ReSOCs.
纳米纤维作为一种高活性的空气电极，在可逆固体氧化物电池（ReSOCs）中有很大的应用前景；然而，一个棘手的问题是如何将纳米纤维粘接到电解质上，而不损坏其原始形态。在此，通过简便的直接组装方法将 PrBaCaCoO (PBCC)纳米纤维用作空气电极，这导致了纳米纤维的大部分独特微观结构得以保留，并且通过施加电化学极化实现了纳米纤维电极与电解质的牢固粘附。具有 PBCC 纳米纤维空气电极的单个电池在 750°C 下具有出色的最大功率密度（1.97 W cm）、电解性能（1.3 A cm 在 1.3 V 时）和 200 h 的运行稳定性。这些发现为利用纳米纤维电极实现高性能和耐用的 ReSOCs 提供了一种简便的方法。
