Abstract: Described herein are systems and methods for the management and control of electrolyte within confined electrochemical cells or groups (e.g. stacks) of connected electrochemical cells, for example, in an electrolyzer. Various embodiments of systems and methods provide for the elimination of parasitic conductive paths between cells, and/or precise passive control of fluid pressures within cells. In some embodiments, a fixed volume of electrolyte is substantially retained within each cell while efficiently collecting and removing produced gases or other products from the cell.
October 1, 2020
January 21, 2021
Eric SEYMOUR, Gregory KUMOR, Erik T. HERRERA, Byron J. BURKILL, David COX, Sandeep NIJHAWAN, Cameron TAVENER-SMITH, Wayne Richard HEMZACEK, Nathaniel Martin SCHUH
Abstract: A gas diffusion electrode for an electro-synthetic or electro-energy cell, for example a fuel cell, including one or more gas permeable layers, a first conductive layer provided on a first side of the gas diffusion electrode, and a second layer, which may be a second conductive layer, provided on a second side of the gas diffusion electrode. The one or more gas permeable layers are positioned between the first conductive layer and the second layer, which may be a second conductive layer, and the one or more gas permeable layers provide a gas channel. The one or more gas permeable layers are gas permeable and substantially impermeable to the liquid electrolyte. The porous conductive material is gas permeable and liquid electrolyte permeable. The gas diffusion electrode can be one of a plurality of alternating anode/cathode sets.
December 21, 2017
Date of Patent:
April 28, 2020
Gerhard Frederick Swiegers, Stephen Thomas Beirne, Jun Chen, Caiyun Wang