POROUS ELECTRODE ASSEMBLY, LIQUID-FLOW HALF-CELL, AND LIQUID-FLOW CELL STACK

摘要

The present invention provides a porous electrode assembly, a liquid-flow half-cell, and a liquid-flow cell stack. The porous electrode assembly comprises a plurality of porous electrodes which are superimposed, wherein at least two porous electrodes are flow channel electrodes provided with flow channels, and parts of the flow channels of the at least two flow channel electrodes are communicated to form a flow field. A flow field which is formed by mutually communicating flow channels and for flow of electrolyte is arranged inside at least one porous electrode of the porous electrode assembly, and the electrolyte flows in the porous electrode under the guide effect of the flow field, so that the surface area for the electrolyte to permeate the solid part of the porous electrode is increased, the liquid-flow resistance of the porous electrode to the flowing of the electrolyte is reduced, and the liquid-flow pressure difference required by the flowing of the electrolyte is effectively reduced. Moreover, when the electrolyte flows in the flow field, the electrolyte uniformly permeates the porous electrodes on two sides of the flow field, so that the uniformity of the flowing of the liquid flow is improved, the concentration difference polarization caused by non-uniform flowing of the electrolyte is reduced, and the charging-discharging efficiency of a liquid-flow cell with the porous electrode assembly is improved.