This study reports on protonic ceramic fuel cells (PCFCs) that exhibit enhanced performance after the addition of palladium (Pd) interlayers at the cathode–electrode interface. The Pd interlayer is deposited by sputtering on the BaZr_0.2Ce_0.6Y_0.1Yb_0.1O_3-δ (BZCYYb) electrolyte surface, followed by the inkjet printing of PrBa_0.5Sr_0.5Co_1.5Fe_0.5O_5+δ (PBSCF) and sintering. The proposed method successfully has produced a Pd layer that was well integrated between the BZCYYb and PBSCF layers, with no undesired reactions or phase formation. The Pd layer is diffused along the inner surface of the porous PBSCF cathode with the desired gradient composition. In our experiment, the fuel cell power is enhanced by up to 60% compared to the untreated PCFCs. In the former, the peak power density of the optimal cell is 420 mW cm⁻², while that of the untreated sample is 260 mW cm⁻² at 500 °C. The long-term stability of the Pd interlayer is confirmed during cell operation. The impedance analysis has revealed that the presence of the Pd significantly enhances the current collection and reduces the polarization impedance at the cathode–electrolyte interface, especially at low temperatures. These results indicate that the proposed method is promising for the fabrication of high-performance and robust PCFCs.

这项研究报告了质子陶瓷燃料电池（PCFC）在阴极-电极界面处添加钯（Pd）中间层后表现出增强的性能。通过溅射在BaZr _0.2 Ce _0.6 Y _0.1 Yb _0.1 O3 _-δ（BZCYYb）电解质表面上沉积Pd中间层，然后喷墨印刷PrBa _0.5 Sr _0.5 Co _1.5 Fe _0.5 O _{5 +δ}（PBSCF）和烧结。所提出的方法成功地产生了在BZCYYb和PBSCF层之间很好整合的Pd层，没有任何不希望的反应或相形成。Pd层沿着多孔PBSCF阴极的内表面以期望的梯度组成扩散。在我们的实验中，与未处理的PCFC相比，燃料电池的功率提高了60％。在前者中，最佳电池的峰值功率密度为420 mW cm ^-2，而未处理样品的峰值功率密度为260 mW cm ^-2。在500°C下。Pd夹层的长期稳定性在电池操作期间得到确认。阻抗分析表明，Pd的存在显着增强了电流收集，并降低了阴极-电解质界面处的极化阻抗，尤其是在低温下。这些结果表明，所提出的方法对于制造高性能且坚固的PCFC很有希望。