Fig. 4: Conductivity analysis.
From: Synergistic proton conduction via Ca-vacancy coupled with Li+-bridge in Ca5(PO4)3OH
(A) EIS spectra and (B) conductivity of Ca5 (PO4)3 OH-H varying with hydrogen concentration. C The measured electromotive force, theoretical electromotive force, and H+ transfer number from a hydrogen concentration cell based on Ca5(PO4)3OH-H(Li) electrolyte. D I-V and I-P characteristics of the Ca5(PO4)3OH-H(Li) electrolyte fuel cell with and without BZCY layer under H2/air atmosphere at 550 °C. E Corresponding electrochemical impedance spectroscopy of the cells with and without BZCY layer and EIS fitting results are listed in Supplementary Tables 3, 6. F Typical Nyquist plots for the Ca5(PO4)3OH-H(Li) in the presence of H2 (red) and D2 (blue) at 550 oC and fitting results are listed in Supplementary Tables 3, 5.
