Cathode optimization structure of solid oxide fuel cell metal foam runner

Abstract

The invention discloses a cathode optimization structure of a solid oxide fuel cell metal foam runner. The structure comprises an anode connector, an anode support layer, an anode catalyst layer, an electrolyte layer, a cathode catalyst layer, a cathode diffusion layer, a metal foam collector, a flat plate metal connector and a cathode connector sequentially combined into a whole from the top down, wherein the metal foam collector is inserted between the cathode diffusion layer and the flat plate metal connector in parallel, to serve as the component of the cathode runner. The cathode catalystlayer and the cathode diffusion layer are made from porous metal ceramic composite material, and the flat plate metal connector is a metal plate with a flat surface and without a groove ridge structure. The porous metal foam collector has good electrical conductivity and thermal conductivity, and relatively good porosity; by using the porous metal foam collector as the solid oxide fuel cell cathode runner, oxygen is easy to be transmitted in the cathode catalyst layer and the cathode diffusion layer, so that the concentration distribution of the oxygen is more uniform, and the condition thatin the traditional groove ridge structure, the oxygen below the ridge is completely consumed is avoided.

Description

technical field [0001] The invention belongs to the field of electrochemical fuel cells, and in particular relates to a structure of a novel cathode channel of a solid oxide fuel cell. Background technique [0002] The current domestic energy consumption structure is irrational, and coal consumption accounts for an excessively large proportion, which is also one of the reasons leading to environmental pollution. Solid oxide fuel cells (SOFC) can use the syngas produced in the coal gasification process as fuel, and further achieve near-zero emissions of pollutants and carbon dioxide through processes such as carbon capture. Therefore, solid oxide fuel cells have attracted much attention in the clean and efficient utilization of coal resources. [0003] At present, solid oxide fuel cells generally use a thinner cathode porous layer to obtain better oxygen transport performance, but for the channel of the trench-ridge structure battery, electrons need to be transferred lateral...

AI Technical Summary

Problems solved by technology

However, a thinner cathode will cause a relatively large activation overpotential at the junction of the ridge and the

Images