School of Mechanical Engineering, Korea University, Seoul, 02841, South Korea.
High-temperature Energy Materials Research Center, Korea Institute of Science and Technology (KIST), Seoul, 02792, South Korea.
Small. 2023 Jun;19(22):e2208149. doi: 10.1002/smll.202208149. Epub 2023 Mar 3.
This study reports the performance and durability of a protonic ceramic fuel cells (PCFCs) in an ammonia fuel injection environment. The low ammonia decomposition rate in PCFCs with lower operating temperatures is improved relative to that of solid oxide fuel cells by treatment with a catalyst. By treating the anode of the PCFCs with a palladium (Pd) catalyst at 500 °C under ammonia fuel injection, the performance (peak power density of 340 mW cm at 500 °C) is approximately two-fold higher than that of the bare sample not treated with Pd. Pd catalysts are deposited through an atomic layer deposition post-treatment process on the anode surface, in which nickel oxide (NiO) and BaZr Ce Y Yb O (BZCYYb) are mixed, and Pd can penetrate the anode surface and porous interior. Impedance analysis confirmed that Pd increased the current collection and significantly reduced the polarization resistance, particularly in the low-temperature region (≈500 °C), thereby improving the performance. Furthermore, stability tests showed that superior durability is achieved compared with that of the bare sample. Based on these results, the method presented herein is expected to represent a promising solution for securing high-performance and stable PCFCs based on ammonia injection.
本研究报告了质子陶瓷燃料电池（PCFCs）在氨燃料喷射环境中的性能和耐久性。通过催化剂处理，与固体氧化物燃料电池相比，在工作温度较低的 PCFCs 中，氨分解率得到提高。通过在氨燃料喷射下将 Pd 催化剂处理在 500°C 下的 PCFCs 的阳极，可以将性能（在 500°C 时的峰值功率密度为 340 mW cm）提高约两倍，而未经 Pd 处理的裸样则提高了约两倍。Pd 催化剂通过原子层沉积后处理工艺沉积在阳极表面，其中混合了氧化镍（NiO）和 BaZrCeYbO（BZCYYb），Pd 可以穿透阳极表面和多孔内部。阻抗分析证实 Pd 增加了电流收集并显著降低了极化电阻，特别是在低温区域（≈500°C），从而提高了性能。此外，稳定性测试表明与裸样相比，实现了卓越的耐久性。基于这些结果，本文提出的方法有望为基于氨喷射的高性能和稳定的 PCFCs 提供一种有前途的解决方案。
