Multifunctional nanocomposite active layers synergistically enhance the performance of reversible proton ceramic cell

Junmeng Jing, Ze Lei, Ziwei Zheng, Haoran Wang, Panpan Zhang, Zheng Yang, Zhaoxiang Wei, Yuhao Wang and Zhibin Yang

Renewable Energy, 2025, vol. 243, issue C

Abstract: Reversible protonic ceramic cell (R-PCC) has garnered significant interest due to their potential for efficient energy storage and conversion. However, the sluggish kinetics of oxygen reduction and evolution reaction result in high polarization resistance (Rp), limiting their performance. In this study, we introduce a PrOx/Ba0.95La0.05Fe0.8Zn0.2O3−δ (BLFZ) impregnated BaCe0.7Zr0.1Y0.1Yb0.1O3−δ (BCZYYb) nanocomposite active layer (NAL) to address this challenge. PrOx nanoparticles enhance reaction kinetics, while BLFZ nanoparticles facilitate proton conduction and expand the reactive site, as confirmed by detailed electrochemical impedance spectroscopy (EIS) and relaxation time distribution (DRT) analysis. The synergistic combination of oxygen-vacancy-rich PrOx, triple-conducting BLFZ, and isomeric BCZYYb phases result in a 72 % reduction in Rp at 600 °C in a symmetrical cell with NAL compared to the bare BLFZ-BCZYYb. Consequently, hydrogen-electrode-supported full cells with NAL achieve a peak power density (PPD) of 0.460 W cm−2 at 600 °C and a current density of 0.562 A cm−2 at 1.3 V and 600 °C, representing a 1.608-fold improvement in PPD and 2.030-fold increase in current density compared to cells without NAL.

Keywords: Protonic ceramic fuel cell; Protonic ceramic electrolysis cell; Oxygen electrode; Nanocomposite active layers (search for similar items in EconPapers)
Date: 2025
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Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:243:y:2025:i:c:s0960148125002137

DOI: 10.1016/j.renene.2025.122551

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