What is the expected effect of increasing the temperature of the SCY conductor on its proton conductivity?

• A. Decrease proportionately
• B. Increase proportionately
• C. Remain constant
• D. Become unstable

Answer: (B)

Increasing the temperature of the SCY (sodium cerate and yttria-stabilized zirconia) conductor is expected to increase its proton conductivity. This phenomenon can be attributed to the relationship between temperature and ion mobility within the material.

As temperature rises, thermal energy increases, which enables the protons (H⁺ ions) to move more freely through the conductor's lattice structure. This enhanced movement results in an increase in the frequency of proton hops from one site to another, consequently improving the ionic conductivity of the material. This relationship is particularly significant in solid-state proton conductors, where increased temperature typically facilitates higher ionic transport.

Therefore, the correct interpretation aligns with the understanding that elevated temperatures generally lead to enhanced ion mobility, which directly correlates with increased proton conductivity in ionic materials.