Reversible proton ceramic electrochemical cells (R-PCECs) are of great interest as efficient energy conversion device. Optimization of structural design can enhance the mechanical properties and gas transport of the cells, resulting in improved electrochemical performance. In this study, we developed a 7-channel micro-monolithic R-PCEC for the first time, with uniform channel distribution and smaller gas diffusion pathway length using phase inversion/extrusion technique. The assembled cell with Ni-BaZrCeYYbO (Ni-BZCYYb, fuel electrode support) | BaZrCeYYbO (BZCYYb, electrolyte) | PrBaSrCoFeO (PBSCF, air electrode) structure showed a peak power density of 0.94 W cm at 700 °C in fuel cell mode and electrolysis current density of 2.17 A cm at 700 °C with an operating voltage of 1.3 V. Additionally, electrochemical impedance spectroscopy (EIS) further indicated that the diffusive polarization of the structured cell was effectively reduced compared to single-channel counterpart.

中文翻译：

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构建用于可逆质子陶瓷电化学电池的高性能微型燃料电极


可逆质子陶瓷电化学电池（R-PCEC）作为高效的能量转换装置引起了人们的极大兴趣。结构设计的优化可以增强电池的机械性能和气体传输，从而提高电化学性能。在本研究中，我们利用相转化/挤出技术首次开发了7通道微型单片R-PCEC，具有均匀的通道分布和更小的气体扩散路径长度。 Ni-BaZrCeYYbO（Ni-BZCYYb，燃料电极支架）组装电池| BaZrCeYYbO（BZCYYb，电解质）| PrBaSrCoFeO（PBSCF，空气电极）结构在燃料电池模式下在 700 °C 时表现出 0.94 W cm 的峰值功率密度，在 700 °C 时电解电流密度为 2.17 A cm，工作电压为 1.3 V。此外，电化学阻抗谱（EIS）进一步表明，与单通道对应物相比，结构化单元的扩散偏振得到了有效降低。