CDI & Electrosorption

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 applied for novel applications in water treatment, health and energy.

This website is maintained under the responsibility of the International Working Group on CDI&E, who also invites you to attend any of the upcoming CDI&E conferences and symposia.


 

Postdoc position (2 year) in the field of CDI at TU Delft

At TU Delft, there is currently an opening for a 2-year postdoc to work in the field of capacitive deionization (CDI) in close collaboration with Avsalt AB, a Swedish startup company in this field. This project is aimed at developing new strategies to induce ion-selectivity in flow-by CDI devices with multiple flow channels (mCDI). Specifically, we ...continue reading

Posted in CDI | Comments Off on Postdoc position (2 year) in the field of CDI at TU Delft

Pre-release of ‘Physics of Electrochemical Processes’

The pre-release of the book 'Physics of Electrochemical Processes' (ISBN: 9789090332581) by P.M. Biesheuvel and J.E. Dykstra can now be downloaded from the website www.physicsofelectrochemicalprocesses.com free of charge. Topics include: Ch. 1: The extended Frumkin isotherm describes the capacitive salt adsorption in intercalation materials Ch. 2: The Donnan model for the electrical double layer structure ...continue reading

Posted in CDI | Comments Off on Pre-release of ‘Physics of Electrochemical Processes’

New paper published on the important comparison of CDI and RO

A new open access paper was recently published in Desalination that compares the energy use of RO and CDI. Porada et al. “Energy consumption in membrane capacitive deionization and comparison with reverse osmosis”, Desalination (2020), https://doi.org/10.1016/j.desal.2020.114383.  According to the authors, "the work presents the first fair energy consumption comparison of desalination with MCDI and RO. The ...continue reading

Posted in CDI | Comments Off on New paper published on the important comparison of CDI and RO

New ES&T paper on the energy efficiency of electro-driven brackish water desalination

A new Open Access paper was published in the prestigious journal ES&T, from the group of prof. Meny Elimelech (Yale, USA) which discusses a detailed comparison between electrodialysis (ED) and membrane capacitive deionization (MCDI). Patel et al. "Energy Efficiency of Electro-Driven Brackish Water Desalination: Electrodialysis Significantly Outperforms Membrane Capacitive Deionization", ES&T (2020). https://pubs.acs.org/doi/abs/10.1021/acs.est.9b07482 According to ...continue reading

Posted in CDI | Comments Off on New ES&T paper on the energy efficiency of electro-driven brackish water desalination

CDI keeps growing exponentially !

... and the field of Capacitive Deionization keeps on growing at an increasing speed ! With over 160 scientific papers written and published last year, the total number of CDI publications has grown from ∼25 in 2000, to ∼65 in 2010, to over 1,000 at the end of 2019! CDI papers in 2019 came from ...continue reading

Posted in CDI | Comments Off on CDI keeps growing exponentially !