H2 treatment benefit stable operation for ceramic fuel cells with NFMNa electrolyte at lower temperature

Hao Wang, Enyi Hu, Bin Zhu, Fan Yang and Peter Lund

Renewable Energy, 2025, vol. 239, issue C

Abstract: MS-XN-33S-Ternary sodium nickel-ferric manganate layered oxide (NFMNa), a commercialized electrode material for sodium battery, has been used as electrolyte in low-temperature ceramic fuel cells (LT-CFCs) and has attained stable operation for 110 h at 500 °C. In order to reach stable operation of fuel cells at lower temperatures, H2 treated NFMNa (H-NFMNa) is studied. We find that the Ni (Fe, Mn)-O bond length in the H-NFMNa is shorter than that in NFMNa, while the Na−O bond length in H-NFMNa is longer than that in NFMNa. And the content of polycrystalline Na2CO3 increases in H-NFMNa. Ceramic fuel cells with H-NFMNa electrolyte have ion conductivity of 0.092 S cm−1 and peak power density of 523 mW cm−2 at 500 °C. Hydrogen and oxygen concentration cells indicate that H-NFMNa material can only conduct protons in 400–520 °C, while can simultaneously conduct proton and oxygen ion in 540–600 °C. Finally, the fuel cell device using NFMNa electrolyte and BaZr0.1Ce0.7Y0.2O3-δ (BZCY) buffer layer obtain stable operation for 182 h at 490 °C. This result is beneficial for the development of LT-CFCs electrolyte materials and lithium/sodium batteries electrode materials.

Keywords: Low-temperature ceramic fuel cells; Sodium battery electrode; Hydrogen treatment; Concentration cells; Stability; Compatibility (search for similar items in EconPapers)
Date: 2025
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Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:239:y:2025:i:c:s096014812402192x

DOI: 10.1016/j.renene.2024.122124

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