fig4
Figure 4. Electrochemical impedance spectra of symmetrical cells (R-PBM|BZCYYb|R-PBM and R-PBMN|BZCYYb|R-PBMN) measured at 650 °C in (A) H2 and (B) CH4 atmospheres. Distribution of relaxation times (DRT) analysis for (C) H2 and (D) CH4 at 650 °C. Temperature-dependent polarization resistance (Rp) in (E) H2 with other materials reported recently [27-34] and (F) CH4 from 550-700 °C.
