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<p>Proton ceramic fuel cells (PCFCs) exhibit significant advantages over common solid oxide fuel cells (SOFCs), including lower operating temperatures and longer stability. The development of high-performance PCFCs is contingent upon the exploitation of advanced electrolyte and electrode materials as well as innovative fabrication techniques. In this work, we propose a novel in situ cold sintering method to process the PCFCs based on BaZr<sub>0.1</sub>Ce<sub>0.7</sub>Y<sub>0.1</sub>Yb<sub>0.1</sub>O<sub>3−<i>δ</i></sub> (BZCYYb) electrolyte and LiNi<sub>0.8</sub>Co<sub>0.15</sub>Al<sub>0.05</sub>O<sub>2−<i>δ</i></sub> (LNCA) anode. The employed materials were characterized using x-ray diffraction (XRD), scanning electron microscopy (SEM), and Raman spectroscopy. The fabricated PCFCs, which underwent cold sintering, were comprehensively evaluated in terms of morphology, <i>I</i>–<i>V</i> characteristics, impedance spectra, and stability. Our results demonstrate that the in situ cold sintering process induces lithium diffusion from the LNCA anode into the BZCYYb electrolyte to form molten lithium salts, which enhances the density and proton conductivity of the electrolyte layer. Consequently, the fabricated PCFCs achieve significant peak power densities of 0.39–1.20 W/cm<sup>2</sup> and open-circuit voltages (OCVs) of 1.08–1.2&#xa0;V at 400–500°C. These performance metrics are attributed to the rapid proton transport and high electrolyte density facilitated by the cold sintering process. Additional durability tests confirm that the PCFCs can be operated stably at 500°C under various fixed current densities. Finally, the developed PCFC is used to charge a supercapacitor in a Internet of Things (IoT) system to illustrate its effectiveness in practical application. Our work underscores the potential of the cold sintering method to achieve high-performance PCFCs based on BZCYYb electrolyte and LNCA anode.</p>

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Development of High-Performance PCFCs Based on BZCYYb Electrolyte and LNCA Anode via In Situ Cold Sintering

  • 期刊论文

  • 发表日期：

    2025年7月3日

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  • Junjie Huang,
  • Yaodong Zhang,
  • Jianjin Fu

摘要

Proton ceramic fuel cells (PCFCs) exhibit significant advantages over common solid oxide fuel cells (SOFCs), including lower operating temperatures and longer stability. The development of high-performance PCFCs is contingent upon the exploitation of advanced electrolyte and electrode materials as well as innovative fabrication techniques. In this work, we propose a novel in situ cold sintering method to process the PCFCs based on BaZr0.1Ce0.7Y0.1Yb0.1O3−δ (BZCYYb) electrolyte and LiNi0.8Co0.15Al0.05O2−δ (LNCA) anode. The employed materials were characterized using x-ray diffraction (XRD), scanning electron microscopy (SEM), and Raman spectroscopy. The fabricated PCFCs, which underwent cold sintering, were comprehensively evaluated in terms of morphology, I–V characteristics, impedance spectra, and stability. Our results demonstrate that the in situ cold sintering process induces lithium diffusion from the LNCA anode into the BZCYYb electrolyte to form molten lithium salts, which enhances the density and proton conductivity of the electrolyte layer. Consequently, the fabricated PCFCs achieve significant peak power densities of 0.39–1.20 W/cm2 and open-circuit voltages (OCVs) of 1.08–1.2 V at 400–500°C. These performance metrics are attributed to the rapid proton transport and high electrolyte density facilitated by the cold sintering process. Additional durability tests confirm that the PCFCs can be operated stably at 500°C under various fixed current densities. Finally, the developed PCFC is used to charge a supercapacitor in a Internet of Things (IoT) system to illustrate its effectiveness in practical application. Our work underscores the potential of the cold sintering method to achieve high-performance PCFCs based on BZCYYb electrolyte and LNCA anode.