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

Author

Listed:
  • Wang, Hao
  • Hu, Enyi
  • Zhu, Bin
  • Yang, Fan
  • Lund, Peter

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.

Suggested Citation

  • Wang, Hao & Hu, Enyi & Zhu, Bin & Yang, Fan & Lund, Peter, 2025. "H2 treatment benefit stable operation for ceramic fuel cells with NFMNa electrolyte at lower temperature," Renewable Energy, Elsevier, vol. 239(C).
    • Handle: RePEc:eee:renene:v:239:y:2025:i:c:s096014812402192x
    DOI: 10.1016/j.renene.2024.122124
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