flow cell electrode structure, flow cell cell stack and sealing structure of flow cell cell stack

摘要

The present invention relates to flow cell electrode structures, flow cell cell stacks and sealing structures of flow cell cell stacks, wherein the density of vertical tows in the electrode fibers is greater than that of parallel tows. The ratio of the number of vertical tows and parallel tows per electrode fiber volume is at least 6:4. The electrode structure is composed of an odd-numbered layer of electrode fibers, and the porosity of each other layer is greater than that of the central layer. The electrode structure mentioned in the present invention is mainly based on a vertical tow perpendicular to the large surface of the electrode. First, the contact resistance can be reduced by increasing the contact area of adjacent parts on the electrode surface, and secondly, the electrode has good mechanical performance. gives This structure reduces the contact resistance by 30% to 50% compared to the original structure. Each layer of the electrode has a different thickness according to the porosity, and each layer with optimized thickness has the same porosity after compression. By lowering the differential polarization, the cell energy output under a given power is improved.