fig2
![Review on Fe-based double perovskite cathode materials for solid oxide fuel cells](https://image.oaes.cc/b54869a0-2568-4d4e-99ef-eb92b43517f2/em4070.fig.2.jpg)
Figure 2. The configuration of a fuel cell stack and working principle of a solid oxide fuel cell.
Figure 2. The configuration of a fuel cell stack and working principle of a solid oxide fuel cell.
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