Volker Presser gives an invited keynote lecture on “Electrochemical lithium-ion separation” at the 7th Conference on Electrochemical and Membrane Separation Science and Technology in Wroclaw, Poland. Collaborator Pegah Fatehbasharzad presents a poster on “Electrosorption of diverse organic compounds: Mechanistic insights and applicability across molecular structures”.
An annual tradition: our team at the PhD students’ day of Universität des Saarlandes 🎓
Cansu Kök answered the question on how to design electrochemical tools for the direct lithium-ion separation from seawater (and Saarland mine water): “Continuous lithium-ion extraction via fuel cell desalination”; work in collaboration with Lei Wang, Jean Gustavo De Andrade Ruthes, Antje Quade, and Matthew Suss.
Nikolaos Papadopoulos presented his inspiring modelling + experimental work on “Physical modeling of silicon-containing Li-ion batteries through a multi-species multi-reaction model” to design high-performance Si-based lithium-ion batteries; work in collaboration with Oliver Queisser and Simon Schwunk.
Liying Xue presented the power of multi-phase material design on high-capacity lithium-ion batteries: “Multi-phase synergy enhances lithium storage performance of oxalate”; work in collaboration with Oliver Janka and Chaochao Dun.
Welcome our visiting Ph.D. student Yassine Seffar from UM6P – University Mohammed VI Polytechnic. Yassine will be working with our team on ion-selective and advanced electrochemical desalination.
New paper published in Journal of Hazardous Materials. This collaborative work explores the degradation of microplastics by electrocoagulation via the combination oxidation and flocculation effects.
New paper published in Separation and Purification Technology on “Optimized electrochemical recovery of lithium-ions from spent battery cells using carbon-coated lithium iron phosphate”. We optimized a system based on carbon-coated lithium iron phosphate electrodes. The electrodes selectively extract lithium ions from complex leaching solutions derived from real LCO (LiCoO₂) cathode materials. Over the course of 300 cycles, we observed an average lithium uptake capacity of about 11 mg of Li-ions per 1 gram of active material per cycle. We also demonstrated excellent selectivity toward lithium over competing ions like calcium and cobalt, which is critical in real-world leachates. Our optimized electrode materials and cycling strategies improve both the performance and lifetime of the electrochemical recovery system.
We acknowlege the contributions of all co-authors (Stefanie Arnold, Lei Wang, Dr Rudi Mertens, and Sascha Wieczorek).
New paper published in Electrochimica Acta on “Transparent polyaniline/MXene thin films supercapacitors”. In this collaborative work, we developed transparent, nanostructured films combining MXene Ti3C2Tx and polyaniline for miniaturized energy storage devices. The films show promising electrochemical performance and stability, opening avenues for transparent supercapacitor applications. Co-authors: Ariane Schmidt, Samantha Husmann, and Aldo J.G. Zarbin.
Our Ph.D. student Nikolaos Papadopoulos presents joint work on “Physical Modeling of Silicon-Containing Li-Ion Batteries through a Multi-Species Multi-Reaction Model” as a poster at the Advanced Battery Power in Aachen, Germany.
Mingren Liu and Delvina Tarimo (PhD) have been selected to participate in the 74th Lindau Nobel Laureate Meeting. At present, Mingren works on nanoporous carbon supercapacitors and advanced battery chemistries, pushing the boundaries of energy storage. And Delvina focuses on lithium-sulfur batteries and sustainable electrode materials, driving the next generation of green energy solutions. Congratulations, Mingren and Delvina! You are the 6th and 7th member of our team to experience LINO!
Thrilled to see our 2023 paper “The many deaths of supercapacitors: Degradation, aging, and performance fading” is among the 10 most cited articles of 2023 of the high-impact factor journal Advanced Energy Materials.
Volker Presser gives two oral presentations at the MATSUS conference in Sevilla, Spain:
New paper published in ACS Applied Polymer Materials. This joint work with Markus Gallei from Saarland University has developed smart core–shell particles with imidazole-functionalized shells that respond to acidic solutions and hydrophobic anions, forming viscoelastic opal films with tunable structural colors. These films serve as affordable optical sensors, changing color in response to environmental stimuli, with potential applications in life sciences, environmental monitoring, and electrochemistry.
New paper published on synthesis and self-assembly of pore-forming three-arm amphiphilic block copolymers in Macromolecular Rapid Communications from the collaboration with Markus Gallei.
Welcome Burcu Tan who will be working on electrochemical lithium ion extraction in our team on the eLiFlow project.
Our Austrian / German carbon spherogel research project with Michael Elsaesser at Paris Lodron Universität Salzburg, funded by Austrian Science Fund FWF and Deutsche Forschungsgemeinschaft (DFG) – German Research Foundation to be prominently featured in the DFG 2025 calendar.
New paper in Energy & Environmental Materials: Dry Electrode Processing for Free-Standing Supercapacitor Electrodes with Longer Life, Higher Volumetric Outputs, and Reduced Environmental Impact.
Our research explores the benefits of dry electrode processing for supercapacitors. As one of the pioneering energy storage systems to adopt dry electrode processing (e.g., through [formerly] Maxwell), supercapacitors have shown significant advancements in this area. Our study follows up with this processing technology and demonstrates notable improvements in electrode lifespan, volumetric energy density, and environmental sustainability by utilizing dry processing techniques. By bypassing conventional solvent-based methods, we achieved a 28% increase in energy density and a reduction in manufacturing-related CO2 emissions, while also extending the lifespan of supercapacitors across various electrolytes, including organic, ionic liquids, and quasi-solid state.
In the broader context, this research contributes to the ongoing efforts to enhance energy storage technologies. Supercapacitors are crucial for bridging the gap between batteries and capacitors, offering rapid charge/discharge capabilities and long cycle life. The adoption of dry electrode processing can advance their sustainability and, at the same time, yield a better performance per the more intricate particle-particle contact and ability to obtain even ultra-thick electrodes (in our work: up to 700 µm).
Team Jena: Marius Hermesdorf, Desirée Leistenschneider; Team Saarbrücken: Emmanuel Pameté, Jean Gustavo De Andrade Ruthes, Anna Seltmann, Delvina Tarimo (PhD).
Making an electrode is art and science: The relevance of electrode preparation optimization and potential window maximization for high-rate lithium-ion batteries. Our new paper in Advanced Energy and Sustainability Research optimizes lithium titanate (LTO) anodes for lithium-ion batteries. By tweaking the dry and wet mixing processes during electrode fabrication, we achieved remarkable improvements in capacity retention, especially at high charge rates. Employing an extended potential window of 0.01-3.00 V vs Li+/Li, a high capacity of about 290 mAh/g at 0.1 A/g was obtained. Specifically, using the best-performing electrode processing in our work, we obtained a capacity of 232 mAh/g at 1C with a capacity retention of 80% after 300 cycles at a rate of 34C (68% after 1000 cycles). These results highlight the importance of control over particle dispersion in maximizing electrode performance.
This work underscores the potential of LTO as a durable and safe option for applications where high power and long cycle life are critical, such as electric vehicles and grid storage. By reducing solvent usage by up to 50%, our study shows the potential of cost and material savings per optimized processing.
Many thanks to all authors: Amir Haghipour, Stefanie Arnold, Jonas Oehm, Dominik Schmidt, Lola Gonzalez-Garcia, Dr. Hitoshi Nakamura, Tobias Kraus, and Volker Knoblauch
New paper published on “Multi-scale circuit model bridges molecular modeling and experimental measurements of conductive metal-organic framework supercapacitors” in Physical Chemistry Chemical Physics.
Welcome new student intern Matthias Haller from Saarland University who will be working on exploring electrochemical energy storage and advanced supercapacitors.
We are excited to announce the publication of our latest collaborative perspective paper in Advanced Functional Materials, where we explore the role of MXene-enabled technologies in shaping the cities of tomorrow.
With over 60% of the world’s population now living in urban areas, the need for smart urbanization has never been greater. The concept of the smart city envisions a self-sufficient, responsive, and interactive urban environment—one that seamlessly integrates technology to enhance the well-being of its citizens. MXenes, a class of tunable 2D nanomaterials, are emerging as a key enabler of this transformation.
In this perspective, we outline how MXenes can drive sustainable urban development by advancing:
Self-sufficient and adaptive buildings that optimize energy, water, and air usage.
Next-generation IoT and telemedicine applications, overcoming technological barriers with their unique multifunctional properties. A roadmap for practical MXene integration, demonstrating their feasibility in real-world smart city infrastructures.
Many thanks to Michael Naguib and Agnieszka M. Jastrzębska for this interesting collaboration.
Our PhD student Cansu Kök presents a poster at the 2024 Fall MRS with the title “Continuous Lithium-Ion Extraction via Fuel Cell Desalination”
