Though at present the CDIE website may have a focus on CDI, we expect to see increasing numbers of contributions where the fundamental phenomenon of electrosorption is applied for novel applications in water treatment, health and energy.
Contact resistance can be reduced by either introducing contact pressure between current collectors and electrodes or using porefilling adhesive to create a point contact configuration. They characterize electrical resistances in a CDI system, present an equivalent circuit model and propose measurable figures of merit to describe cell resistance. In the more theoretical paper of the two, published OPEN ACCESS in Colloids and Interfaces Science Communications. Capacitive deionization; Electrochemistry at interfaces; Coagulation; Sensors and Biosensors; Electroanalytical methods for the, FLYER SCOPE of IAPBioelectrodes. They emphasize here that energy consumption of the CDI process is the unrecoverable dissipated energy during an operation cycle, that should not include stored capacitive energy. Seriously. They also found that contact resistance between current collectors and porous electrodes is the major contributor to cell resistance in nearly all published CDI cells. Two recent papers with authors from the US, The Netherlands, and Israel, convincingly show the relevance of chemical charge residing in the carbon electrodes to enhance salt adsorption capacity of CDI electrodes. Researchers from Stanford University published an article in Environmental Science and Technology. It that has the advantage that desalination time can be lengthened significantly. They outline a method to identify electronic and ionic resistances. For example, on top of establish the spacer channel thickness and porosity right after assembly of the MCDI cell, they present a way to measure ionic and electronic resistances in a DI cell. This model is validated against experimental data and used to calculate the ionic resistances across the MCDI cell.