New review paper in Carbon on hydrogen densification in carbon nanopore confinement: Insights from small-angle neutron scattering using a hierarchical contrast model from our long-term collaboration with Oskar Paris (Montanuniversität Leoben).
Author: vpresser
New review paper published in Langmuir on multi-channel membrane capacitive deionization
New paper published in Langmuir on emerging frontiers in multichannel membrane capacitive deionization. Spearheaded by our group alumni Choonsoo Kim, together with Hyunjin Kim, Seonghwan Kim, and Byeongho Lee from Kongju National University, our joint work dives deep into the advancements and future prospects of MC-MCDI technology. We explore how this innovative approach not only pushes the boundaries of efficiency and sustainability in addressing global water scarcity but also sets new benchmarks for electrochemical desalination.
Volker Presser gives seminar talk on electrochemical desalination at the École normale supérieure in Paris
Volker Presser gives a seminar talk with the title “Electrochemical desalination and Lithium-ion extraction” at the École normale supérieure on invitation of former group member Lucie Ries.
New battery published in ACS Applied Materials & Interfaces on sulfidized carbon spherogels for high performance lithium ion batteries
New battery published in ACS Applied Materials & Interfaces on hybridization of carbon spherogels with titanium oxide and sulfur enables high performance lithium-ion battery electrodes. As a result from our research project with Michael Elsaesser from the Paris Lodron Universität Salzburg, we introduce a novel approach to enhancing lithium-ion battery electrodes. We have successfully combined titanium oxide and sulfur with carbon spherogels, achieving high performance in terms of stability and capacity. Our method resulted in electrodes combining high charge storage capacity and electrical conductivity, while maintaining a core-shell morphology. The process involved producing carbon spheres encapsulating titania and sulfur using a template-assisted sol-gel route, followed by thermal treatment with hydrogen sulfide gas. This treatment fully preserved the microporous hollow sphere architecture of the carbon shells, facilitating sulfur deposition and titania crystal protection.
New review article published in Desalination about direct lithium extraction
New review paper published in Desalination. Our manuscript examines various Direct Lithium Extraction (DLE) technologies, a response to increasing lithium demand driven by its extensive use in batteries for diverse applications. Traditional lithium extraction methods, including mining and evaporation ponds, pose significant environmental challenges and may not suffice to meet global demand. DLE offers a potentially more efficient and sustainable alternative, akin to the impact of shale extraction on the oil industry. This study provides a comprehensive analysis of DLE techniques such as adsorption, ion exchange, membranes, direct carbonation, and electrochemical processes. It assesses their operational fundamentals, advantages, and limitations. The research aims to evaluate DLE’s capacity for efficient and sustainable lithium recovery amidst rising energy sector demands, addressing associated challenges like cost, environmental impact, and scalability. The findings intend to enrich understanding of DLE’s potential and hurdles, guiding future research in this critical technological area.
New paper on a more environmentally friendly method for carbon spherogel synthesis published in Energy Advances
New paper published in Energy Advances from our continued collaboration with Michael Elsaesser (Paris Lodron Universität Salzburg) on carbon spherogels. Custom-designed nanoporous carbon materials enhance sustainable electrochemical technologies by offering better performance and efficiency. Carbon spherogels, which are highly porous carbon aerogel materials made up of a network of hollow carbon nanospheres with consistent diameters, are particularly promising. They offer unique advantages, including superior electrical conductivity, customizable porosity, adjustable shell thickness, and extensive surface area. In this work, we present a new, eco-friendlier approach to producing carbon spherogels using a sol-gel process that templates resorcinol-formaldehyde (RF) with polystyrene spheres in an organic solvent. By adjusting the molar ratio of resorcinol to isopropyl alcohol (R/IPA) and the polystyrene concentration, we identified the optimal conditions for creating carbon spherogels with tunable wall thicknesses. A simplified solvent exchange method from deionized water to isopropyl alcohol was developed to reduce surface tension in the gel’s pores, making this method both time and cost-efficient. The use of isopropyl alcohol, with its lower surface tension, allows for solvent extraction at room temperature and direct carbonization of RF gels with less than 20% loss in specific surface area compared to those dried supercritically. The resulting materials have specific surface areas ranging from 2300 to 3600 m2/g, as confirmed by transmission and scanning electron microscopy, which also demonstrated their uniform, hollow spherical network structure. Notably, these carbon spherogels act as high-performance electrodes for energy storage in supercapacitors, achieving a specific capacitance of up to 204 F/g at 200 mA/g with a 1 M potassium hydroxide (KOH) solution as the electrolyte.
Stefanie Arnold presents work on lithium ion battery recycling at LithiumDays 2023 in Halle
Stefanie Arnold presents work on electrochemical lithium ion battery recycling at the LithiumDays 2023 in Halle, Germany.
Behnoosh Bornamehr successfully defended her thesis
Behnoosh Bornamehr has successfully defended her thesis with the title “Derivatization and design of transition metal oxides and sulfides for advanced and sustainable battery technology”.
Kaitlyn Prenger, Volker Presser, and Jean Gustavo Ruthes present at the Lorentz Center Workshop on Electrochemical Energy Storage in 2D and Layered Materials on MXene
Three contributions at the Lorentz Center Workshop on Electrochemical Energy Storage in 2D and Layered Materials with two poster presentations and an oral (virtual) talk on “MXene and hybrid electrodes for high performance energy storage”.
Volker Presser presents at the Advanced Materials Safety conference work on MXene
Volker Presser gives an oral presentation at the Conference on the Safety of Advanced Materials in Saarbrücken on the topic “Synthesis and recycling of MXene electrodes for high performance energy storage”.