Strain reducing proton conductivity (IMAGE)
Caption
When yttrium-doped barium zirconate (BZY20) is deposited on an electrode, the atoms near the surface are compressed from their ideal position. This in-plane compressive strain increases the barrier to proton diffusion, thus reducing proton conductivity and performance of solid oxide fuel cells. This decrease in proton conductivity matches reported values of proton conductivities in high-performance proton-conducting ceramics fuel cell. Strategies to overcome this strain will help to improve performance in the future.
Credit
Yamazaki Lab, Kyushu University
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