Movement of oxygen in the gas diffusion layer by solid oxide electrolyte.

Abstract

To measure air excess ratio in exhaust gas, sensors which measure oxgen density in the gas by solid oxide electrolyte with gas diffusion layer are used. In this paper, the movement of oxygen in the gas diffusion layer by solid oxide electrolyte is simulated by Nelnst's equation oxide electrolyte and diffusion equation for gas diffusion layer. As a result, authors confirmed that the current value at the solid oxide electrolyte with the change of oxgen density distribution in gas diffusion layer is consistent with the experimental value, and is effected by the thickness of the diffusion layer.