Capacitive deionization (CDI) is a promising new technology for water desalination making use of an electrical voltage applied between two electrodes. Even at rather low voltages of 1.2 V, desalinated water can be produced. This “direct current” low voltage can easily be produced using a small solar panel. The academic interest in CDI has increased rapidly in the past 5 years as can be read in the news items. Companies, from startups and SMEs to multinationals, have research activities and commercial deployment in the field of CDI.
Electrosorption is the fundamental process underlying the CDI technology describing the interaction of molecular species and ions with charged materials for chemical conversion and/or temporary storage and separation. With the multitude of molecular species that can be of interest, ranging from metal and salt ions (lithium, arsene) all the way up to protein and designer molecules such as pharmaceuticals, and the multitude of solid and porous materials that one can think of, the possibilities are enormous.
Though at present the CDI&E website may have a focus on CDI, we expect to see increasing numbers of contributions where the fundamental phenomenon of electrosorption is applie