Tahir Abdullah, Belotti Alessio, Song Yufei, Wang Yuhao, Maradesa Adeleke, Li Jingwei, Tian Yunfeng, Ciucci Francesco
Department of Mechanical and Aerospace Engineering, The Hong Kong University of Science and Technology, Hong Kong 999077, China.
Chair of Electrode Design for Electrochemical Energy Systems, University of Bayreuth, Bayreuth 95448, Germany.
ACS Appl Mater Interfaces. 2024 Aug 28;16(34):44645-44654. doi: 10.1021/acsami.4c03312. Epub 2024 Aug 16.
Protonic ceramic fuel cells (PCFCs) offer a promising, clean, and efficient energy conversion solution. However, thermal mismatch between cathodes and electrolytes remains a critical obstacle, leading to interfacial damage such as cracking and delamination. Incorporating negative thermal expansion (NTE) materials into the cathode can mitigate this issue. The challenge lies in integrating NTE materials without compromising electrochemical performance or causing unwanted reactions during sintering. This study introduces a novel BaFeZrO (BFZ)-NdMnO composite cathode fabricated using an ultrafast high-temperature sintering (UHS) process. This approach mitigates thermal expansion while boosting the cathode's catalytic activity compared to a single-phase BFZ cathode. The resulting fuel cell achieves a high peak power density of ∼550 mW cm at 600 °C and demonstrates excellent stability during a 100 h test at 550 °C. These findings highlight the potential of UHS for developing high-performance, thermally compatible cathode materials that advance the field of PCFCs.
质子陶瓷燃料电池（PCFC）提供了一种有前景、清洁且高效的能量转换解决方案。然而，阴极与电解质之间的热失配仍然是一个关键障碍，会导致诸如开裂和分层等界面损伤。将负热膨胀（NTE）材料掺入阴极可以缓解这一问题。挑战在于集成NTE材料时不损害电化学性能，也不会在烧结过程中引发不必要的反应。本研究介绍了一种采用超快高温烧结（UHS）工艺制备的新型BaFeZrO（BFZ）-NdMnO复合阴极。与单相BFZ阴极相比，这种方法在减轻热膨胀的同时提高了阴极的催化活性。所得燃料电池在600°C时实现了约550 mW cm的高峰值功率密度，并在550°C下进行的100小时测试中表现出优异的稳定性。这些发现凸显了UHS在开发高性能、热兼容阴极材料方面的潜力，推动了PCFC领域的发展。
