RECHARGEABLE ELECTROCHEMICAL CELLS

摘要

Provided are electrochemical devices that are rechargeable, where the regeneration techniques are based on a batchwise application of current or current density to the cells, where there are a service mode where no current or current density is applied and a recharge mode where a current or current density is applied. Electrochemical and EDI systems according to the embodiments herein are suitable for deionization and/or purification of typical municipal tap quality water in applications where demand for purified, low-TDS water is intermittent. Such operations avoid the use of chemical additions for regeneration purposes. In addition the cells provided herein are amenable to small footprints for consumer and commercial applications such as: dishwashers, washing machines, coffee and espresso makers, ice makers, steam tables, car wash water sources, and steamers.

主权项

1. An electrochemical cell comprising:
a product compartment containing one or more ion-exchange resins; a concentrate compartment; at least two ion-exchange membranes selected from the group consisting of a cation-permeable membrane, an anion-permeable membrane, a bipolar membrane, and combinations thereof; and a cathode and an anode; wherein the electrochemical cell is operated batch-wise, having a service mode where no current density is applied to the electrochemical cell and a recharge mode where a current density is applied to the electrochemical cell.