fig6
![Review on Fe-based double perovskite cathode materials for solid oxide fuel cells](https://image.oaes.cc/b54869a0-2568-4d4e-99ef-eb92b43517f2/em4070.fig.6.jpg)
Figure 6. Plots of conductivity (A), area specific polarization resistance (ASR) (B), coefficient of thermal expansion (CTE) (C), and peak power density (PPD) (D) data of LnBaFe2O5-based materials taken from Table 2 against the data publication years.