Publications Repository - Gdańsk University of Technology

Composite materials consisting of acceptor doped lanthanum orthoniobate electrolyte phase (La0.98Ca0.02NbO4) and Li2O:NiO:ZnO semiconducting phase were synthesized. The precursor powder of La0.98Ca0.02NbO4 was prepared in nanocrystalline (mechanosynthesis) and microcrystalline (solid-state synthesis) form. The composite can be applied in a single-layer fuel cell, because of the presence of two phases acting as an anode and a cathode simultaneously. X-ray diffraction data show that the materials consist of two expected phases. Scanning Electron Microscope images, with Energy Dispersive X-Ray analysis show that La0.98Ca0.02NbO4 as well as Li2O:NiO:ZnO are mixed together in the volume of the material. Open circuit voltage both for nano- and microcrystalline composite do not exceed 0.8 V. The single-layer fuel cell is degrading upon time and the voltage drop is observed. The processes of ZnO reduction and Zn diffusion and evaporation as responsible for cell degradation are discussed.

Authors

• dr inż. Piotr Winiarz link open in new tab ,
• dr inż. Tadeusz Miruszewski link open in new tab ,
• dr inż. Sebastian Wachowski link open in new tab ,
• dr inż. Kacper Dzierzgowski link open in new tab ,
• dr inż. Iga Szpunar link open in new tab ,
• mgr inż. Krzysztof Zagórski link open in new tab ,
• dr hab. inż. Aleksandra Mielewczyk-Gryń link open in new tab ,
• prof. dr hab. inż. Maria Gazda link open in new tab