New review paper on electrosorption of organic compounds published in Chemical Engineering Journal.

The progressing electrification of water remediation: review article on electrosorption of organic compounds in Chemical Engineering Journal.
I am happy to see now-online our latest review paper, which summarizes the science and technology of electrosorption of organic compounds (EOC). Traditional methods of water treatment, such as adsorption, encounter limitations when it comes to effectively removing ionic and hydrophilic organic contaminants. Moreover, the lack of on-site regeneration techniques further hinders the efficiency of these methods. EOC not only enhances the adsorption performance but also enables green electricity-assisted regeneration of the adsorbent.
Over the past decades, the field of EOC has witnessed exponential growth in research studies. Many examples demonstrate that the application of electrical potentials can remarkably enhance the adsorption affinity, capacity, and kinetics of conductive carbon adsorbents. However, it remains unclear whether these effects are specific to certain compound classes or universally applicable, and the optimal criteria for designing EOC processes remain elusive.
In our research, we conducted a critical evaluation of the current state of the art in EOC, with a primary focus on active control of adsorption and desorption processes and their effects on both ionic and neutral organic compounds. By thoroughly considering compound speciation and surface chemistry of electrode materials, we gained mechanistic insights into the EOC process and highlighted the differences between electrosorption of inorganic and organic compounds.
We have also proposed insightful performance parameters and provided clear definitions to unify the rapidly expanding research in the EOC field. By doing so, we aim to establish a foundation for consistent analysis and evaluation of EOC techniques. Furthermore, we discuss potential application scenarios and outline future research directions to guide the development of this exciting technology. EOS, thereby, is not a one-size-fits-all solution for removing contaminants. However, it offers a valuable tool, particularly for tackling the challenges posed by hydrophilic and ionic organic contaminants, which often prove difficult for conventional adsorption processes.
Thanks to the great team of scientists authoring the work from the Helmholtz Centre for Environmental Research (UFZ): Navid SaeidiFalk Harnisch, Franz-Dieter Kopinke, Anett Georgi

Dr. Delvina Tarimo has been awarded a research fellowship by the Alexander von Humboldt Foundation

We are very happy that Delvina Tarimo (PhD) has been awarded a research fellowship by the Alexander von Humboldt Foundation! Delvina will be carrying out work on nanoconfinement and lithium-sulfur batteries. Congratulations, Delvina, and thanks for choosing the INM-Leibniz Institute for New Materials and our team for your research!

Work of our team being presented at the BDI&E conference

Work of our group has been presented at the 6th International Conference on Battery Deionization & Electrochemical Separation (BDI&E 2023). Former group member, Prof. Choonsoo Kim, presented joint work on “Redox-mediated Electrodialysis for Valorization of Tetramethylammonium hydroxide (TMAH) from Semiconductor Wastewater”. Volker Presser gave an online talk on “Continuous and intermittent direct electrochemical lithium extraction”.

Jean Ruthes and Volker Presser give talks at the French-German Summer Workshop in Nantes

Jean Ruthes and Volker Presser present at the 2nd Franco-German Summer Workshop on High Power Devices in Nantes (France).

Volker speaks about “MXene and hybrid electrodes for high performance energy storage” on the 21st of June.

Jean speaks about “Hydrogel-based flexible energy storage using electrodes based on polypyrrole and carbon threads” on the 23rd of June.

New paper published in Carbon on the use of carbon black for CDI electrodes

New work published in Carbon in collaboration with Prof. Choonsoo Kim. In our research, we explore the impact of different carbon types on desalination capacity and rate. We exemplify the impact of conventional carbon black, nanoscaled carbon onions, and micro-mesoporous carbons. In the early cycles, we observed that using AC electrodes without additives resulted in a higher desalination capacity, reaching approximately 10 mg/g. However, there was a trade-off: the desalination rate was slightly lower. It turns out that larger AC particles limited the transportation of ions within the electrode due to the increased diffusion path length.

By incorporating small and less porous additives, we achieved the highest desalination rate (20 μg/g/s) as the additive particles reduced the ion diffusion path length by increasing size dispersion, thus enhancing overall ion transport and desalination rates.

New paper published in Small Methods about the quest for MBene battery electrodes

Expanding the 2D flatlands: toward MBene Li- and Na-ion batteries 🔋

In our ongoing research to identify sustainable technological alternatives 🌱, we have explored the potential of layered boride materials (MoAlB and Mo2AlB2) for their use in Lithium-ion and Sodium-ion batteries (LIBs and SIBs) 🔬. Great to see our Open Access paper now appeared in print in Small Methods! 🖨️

Some key findings from the paper include:
👉Unlike MXene, no HF is needed for the 3D-to-2D etching reaction🧪
👉Sodium hydroxide treatment applied to MoAlB results in a porous morphology 🍯, leading to higher specific capacities than its original form
👉Mo2AlB2 showcases a more promising specific capacity compared to MoAlB for LIBs, registering a specific capacity of 593 mAh/g after 500 cycles at 200 mA/g ⚡
👉When it comes to SIBs, Mo2AlB2 demonstrated a specific capacity of 150 mA/g at 20 mA/g 📊.
These findings underscore the potential of layered borides as an interesting electrode materials for both LIBs and SIBs, and illuminate 🔦 the significance of surface redox reactions in Li storage mechanisms.

A sincere thank you 🙏 to our amazing partners for their invaluable contributions and collaboration.

Tulane University:
Ahmad Majed
Chukwudi Nwaokorie
Karamullah Eisawi
Audrey Buck
Matthew Montemore
Michael Naguib

INM-Leibniz Institute for New Materials:
Mohammad Torkamanzadeh
Volker Presser

Berkeley Lab:
Chaochao Dun
Jeff Urban