Exceptionally high proton conductivity in Eu2O3 by proton-coupled electron transfer mechanism

Semiconductor Heterostructure (SrFe0.3TiO3-ZnO) Electrolyte with High Proton Conductivity for Low-Temperature Ceramic Electrochemical Cells

“…The final peak of P 4 can be associated with adsorption, dissociation, oxygen diffusion, water formation, and evaporation of water vapor. Similar phenomena have been predicted in previous reports. ,, …”

“…Further, the electrochemical fuel cell performance of the I – V (current–voltage) and I – P (current–power) characteristic curves of SFT-ZnO have been evaluated under an H 2 /air environment at 520–420 °C, as depicted in Figure a. The prepared composite electrolyte-based fuel cell device in the following configuration Ni-NCAL/SFT-ZnO/NCAL-Ni has delivered an impressive power output of 700 mW cm –2 at 520 °C, which is higher than our previously published reports. ,− Such high performance is due to the construction of a heterostructure and interfacial built-in electric field due to the space charge region. Also, the prepared device shows an OCV above 1 V, confirming that neither gas leakage nor short-circuiting issues have been observed, manifesting that the prepared composite is a feasible electrolyte for ceramic fuel cells (CFCs).…”

“…DRT analysis provides evidence of proton transport through the electrolyte of the prepared device Ni-NCAL/SFT-ZnO/NCAL-Ni during electrochemical proton injection at different operational temperatures of 520–420 °C, as displayed in Figure c. The DRT is the primary tool that helps in expanding the overlapped curves and phenomena in the EIS spectra. − Each peak in DRT curves manifests the multiphenomena during the electrochemical process, and each peak’s area reflects the simulated resistance, which is further related to the multiphenomena in SFT-ZnO. In other words, if the peak area is smaller, the resistance of charge transportation (proton conduction) will be low, and vice versa.…”