Constructing high-performance micro fuel electrodes for reversible proton ceramic electrochemical cells

• DOI: 10.1016/j.elecom.2024.107775
• Publication Date: 2024-07-06T16:39:36Z
• Authors: Yeqing Ling; Feifan Huang; Bin Wang; Tao Li
• Keywords: Micro-structure design; Chemistry; Micro-monolithic design; Industrial electrochemistry; Water electrolysis; Reversible protonic ceramic electrochemical cells; QD1-999; 01 natural sciences; TP250-261; 0104 chemical sciences

Reversible proton ceramic electrochemical cells (R-PCECs) are of great interest as efficient energy conversion device. Optimization structural design can enhance the mechanical properties and gas transport cells, resulting in improved performance. In this study, we developed a 7-channel micro-monolithic R-PCEC for first time, with uniform channel distribution smaller diffusion pathway length using phase inversion/extrusion technique. The assembled cell Ni-BaZr0.1Ce0.7Y0.1Yb0.1O3-δ (Ni-BZCYYb, fuel electrode support) | BaZr0.1Ce0.7Y0.1Yb0.1O3-δ (BZCYYb, electrolyte) PrBa0.5Sr0.5Co1.5Fe0.5O5+δ (PBSCF, air electrode) structure showed peak power density 0.94 W cm−2 at 700 °C mode electrolysis current 2.17 A an operating voltage 1.3 V. Additionally, impedance spectroscopy (EIS) further indicated that diffusive polarization structured was effectively reduced compared to single-channel counterpart.