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Many times when I passed by the conference venue of our 2019 CDI&E conference, it reminds me of the wonderful days we were together to share our passion and knowledge towards better understanding and application of CDI-related technologies. Those CDI&E conferences held every other year have been great opportunities for all top researchers and engineers in this field to meet and communicate in person. However, due to the attack of COVID-19 which greatly affects the ways of our living and working, organizers of 2021 conference have decided to move it online. I believe it will be a great opportunity for us to meet and share again.
Despite those changes, CDI research is not at a standstill at all. Up to 380 papers have been published in Web of Science indexed journals in the year 2020, 50 papers more than last year. With considerable difficulties to perform experimental studies, many research groups have been making great efforts on reviewing works and published them in top journals.
These remarkable contributions allow CDI to retain its hot-topic status in the field of environmental science and technology through this year, which also gives all communities great happiness and confidence to pursue our research. I would like to wish you a happy and fruitful new year. And again,

I look forward to seeing you all at CDI&E 2021 conference.
- Prof. Dr.Peng Liang,
   Chairman - CDI&E working group.

We are less than four months away from the next CDI&E conference, to be held from May 11 onward in Atlanta, USA. As you may understand, we had to decide to move this year's conference online, but it will be just as important as ever to attend and to present your work to your colleagues, and learn from each other. While we all wish to meet in person, one advantage of the online format is that it will allow for more individuals to participate, and we will aim to keep costs low. 
We are pleased to inform that abstract submissions are now accepted for the upcoming CDI&E virtual 2021 conference through our conference website Deadline for abstract submissions is: March 8th, 2021.
More information regarding the virtual platform, conference timing, and cost will be announced on the conference website. We anticipate registration cost around $100 USD, with a reduced fee for graduate students. Registration information will be sent to you after your abstract has been received. 

Best regards,
Marta Hatzell, Roland Cusick and Xiao Su

Yesterday a new OPEN ACCESS review was published in the prestigious RSC journal Energy & Environmental Science (impact factor 33), which was composed by an international consortium of authors from The Netherlands (Wageningen University & Research, Wetsus), USA (Yale University), Israel (Technion), South Korea (Seoul National University), and China (Tsinghua University). It features a comprehensive analysis of different approaches in utilizing capacitive deionization (CDI) for selective ion separation, as well as a new theory of selective ion separation for intercalation materials. Please access the paper here, and a recent press release can be found here.

Maarten Biesheuvel (Wetsus) and Jouke Dykstra (Wageningen University), members of the CDI&E working group, are pleased to announce the release of their second book in their series on “Physics of Electrochemical Processes”. This book focuses more strongly on electrode processes and is therefore relevant to the CDI community. Both books can still be downloaded free-of-charge from the website

The new book is titled “Introduction to Physics of Electrochemical Processes” and focuses on electrode processes. One of the topics addressed is the important difference between Faradaic processes that can run forever such as fuel cells, and capacitive (i.e., non-Faradaic) processes, such as ion storage in porous electrodes, where the electrode structure continuously changes upon charging and discharging the electrode, irrespective of the details of the chemistry of the electrode material. Your comments are welcome and can be addressed to the authors via the website. To be updated on new releases, please visit the website, and leave your email address there.

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), 

According to the authors, "the work presents the first fair energy consumption comparison of desalination with MCDI and RO. The comparison is based on experimental data, and the data is compared with results from state-of-the-art theoretical models. We find that the energy consumption difference between RO and CDI is much less than recently reported by the group of Prof. Elimelech (Yale, USA), see weblink."

The authors emphasize that two technologies can only be compared when all metrics are used in the same uniform way, and when for each technology state-of-the-art is considered. A new operational mode for CDI is introduced with a long "hold time" during salt release, leading to unprecedented high values of water recovery obtained in CDI with high feed water salinity of 40 mM NaCl solution. 


We are honored to introduce the 5th International conference on capacitive deionization and electrosorption, which will take place in Atlanta, GA, United States on May 11th-14th, 2021.  The conference will be a good forum for CDI researchers to present new results, draw inspiration, and direct future growth into CDI&E research. We would be grateful for your attendance and participation in this event. To stay up to date with conference preparations, please see our conference website ( or follow us on Twitter (@CDIe_2021).


Last week’s conference in Beijing was a great success! 200 scientists met in Beijing and discussed the latest scientific and industrial developments in the field of Capacitive Deionization. The 4-day conference started on Monday with three tutorials on theory, cell architectures and metrics by renowned professors. Thereafter, the scientific part of the program started, with many talks on operation, materials design, ion selective removal & recovery and the industrial application of CDI technology. The conference was hosted by Prof. Peng Liang from the School of Environment of Tsinghua University, and due to his tremendous efforts and the excellent support by his students, all scientists and industrial partners had an amazing week in Beijing!

We are honored to introduce the 4th International conference on Capacitive Deionization and Electrosorption, which will take place in Beijing, China, from May 20 to 23, 2019. The conference will be a good forum for CDI researchers to present the latest results, to draw inspiration and ideas, and to probe into the future development of CDI&E technologies. Twenty eight renowned scientists have confirmed as keynote or invited speaker. Moreover, more than 100 abstracts have already been submitted. Please visit our website for detailed information:

You can still submit an abstract for an oral and/or poster presentation. The deadline for submission has been extended to November 30th, 2018.

Also, early registration is open from November 1st, 2018 to February 28th, 2019. More information related to the conference will be posted on the website soon.

The upcoming 3rd world conference on CDI&E "Capacitive Deionization, Electrosorption, and Electrodialysis" will be held July 3-6, 2017, in Seoul, Republic of Korea. Following earlier conferences in The Netherlands and Germany, we expect an attendance of over 200 delegates discussing all aspects of water treatment and desalination using electrochemical methods based on porous electrodes and/or ion-exchange membranes, from materials science and theoretical studies, to process engineering and commercial successes.

The conference website is:

The CDI-E working group is looking forward to welcoming you in July 2017 in Seoul, Republic of Korea !

Other CDI-related conferences in 2017 can be found here