A5091432319- Advancements in Battery Materials
- Advanced Battery Materials and Technologies
- Advanced Battery Technologies Research
- Extraction and Separation Processes
- Analytical chemistry methods development
- Magnetic confinement fusion research
- Plasma Diagnostics and Applications
- Ionic liquids properties and applications
- Recycling and Waste Management Techniques
- Electrochemical sensors and biosensors
- Electrochemical Analysis and Applications
- Particle accelerators and beam dynamics
- Supercapacitor Materials and Fabrication
- Mass Spectrometry Techniques and Applications
- Electron and X-Ray Spectroscopy Techniques
- Semiconductor materials and devices
- Electric Vehicles and Infrastructure
- Radioactive element chemistry and processing
- Laser-induced spectroscopy and plasma
- Advanced MRI Techniques and Applications
- Mercury impact and mitigation studies
- Metal and Thin Film Mechanics
- Advanced NMR Techniques and Applications
- Chemical Synthesis and Characterization
- Thermochemical Biomass Conversion Processes
University of Münster
2016-2025
Helmholtz-Institute Münster
2016-2025
Battery Park
2014-2020
Merseburg University of Applied Sciences
2013-2018
Augenstern
2016
Max Planck Institute for Plasma Physics
2015
Max Planck Society
2015
University Hospital Münster
2009
National Agency for New Technologies, Energy and Sustainable Economic Development
1997
Institut für Umwelttechnologien (Germany)
1993
Abstract Being successfully introduced into the market only 30 years ago, lithium‐ion batteries have become state‐of‐the‐art power sources for portable electronic devices and most promising candidate energy storage in stationary or electric vehicle applications. This widespread use a multitude of industrial private applications leads to need recycling reutilization their constituent components. Improving “recycling technology” lithium ion is continuous effort far from maturity today. The...
We present highly promising results for the use of graphite as both electrodes in a “dual-carbon” cell. An ionic liquid-based electrolyte mixture allows stable and reversible ion intercalation/de-intercalation into/from electrodes.
The 1st cycle Coulombic efficiency (CE) of LiNi1/3Co1/3Mn1/3O2 (NCM) at 4.6 V vs. Li/Li(+) has been extensively investigated in NCM/Li half cells. It could be proven that the major part observed overall specific capacity loss (in total 36.3 mA h g(-1)) is reversible and induced by kinetic limitations, namely an impeded lithiation reaction during discharge. A measure facilitating reaction, i.e. a constant potential (CP) step discharge cut-off potential, results increase 22.1 g(-1). This CP as...
Abstract The present work reports on challenges in utilization of spent lithium‐ion batteries (LIBs)—an increasingly important aspect associated with a significantly rising demand for electric vehicles (EVs). In this context, the feasibility anode recycling combination three different electrolyte extraction concepts is investigated. first method based thermal treatment graphite without recovery. second additionally utilizes subcritical carbon‐dioxide (subcritical CO 2 )‐assisted prior to...
Abstract Silicon, as potential next‐generation anode material for high‐energy lithium‐ion batteries (LIBs), suffers from substantial volume changes during (dis)charging, resulting in continuous breakage and (re‐)formation of the solid electrolyte interphase (SEI), well consumption active lithium, which negatively impacts long‐term performance prevents silicon‐rich anodes practical application. In this work, fluorinated phosphazene compounds are investigated additives concerning their...
Abstract Lithium metal as a negative electrode material offers ten times the specific capacity of graphitic electrodes, but its rechargeable operation poses challenges like excessive and continuous interphase formation, high surface area lithium deposits safety issues. Improving | electrolyte interface requires powerful analysis techniques, such ToF-SIMS sputter depth profiling.This study investigates sections with an SEI layer by using different ions. An optimal ion is chosen based on...
The rapid growth of the worldwide demand lithium for batteries (LIBs) can possibly lead to a shortage its reserves. Sodium represent promising alternative because they enable much higher energy densities than other battery systems, with exception LIBs, and are not limited by sodium availability. Herein, we present novel, Na+ ion intercalation material, Na0.45Ni0.22Co0.11Mn0.66O2 (space group P63/mmc) synthesized in air coprecipitation method followed thermal treatment water-rinsing step....
So-called "corrosion" of the aluminum current collector in electrolyte 1 M LiTFSI ethylene carbonate : diethyl carbonate, EC:DEC (3:7, by wt) has been investigated electrochemical and analytical methods. In fact, Al this is actually an anodic dissolution reaction. addition to various degradation processes were identified. A combination a specially developed on-line ICP-OES method situ EQCM measurements revealed that before starts, "activation" process takes place for ca. 6 hours, which...
Non-aqueous organic solvent based electrolytes solutions are state of the art components in lithium ion batteries. Numerous investigations have led to structural, qualitative and quantitative information electrolyte degradation products eventually resulted proposal mechanisms for related aging reactions. To obtain more detailed also knowledge about fundamental processes, identify numerous their structures, novel analytical techniques chemical analysis were developed systematic research...
Today, it is common knowledge, that materials science in the field of electrochemical energy storage has to follow a system approach as interactions between active materials, electrolyte, separator and various inactive (binder, current collector, conductive fillers, cell-housing, etc.) which are similar or even higher importance than properties performance parameters individual only. In particular, for lithium-ion batteries, widely accepted electrolyte interacts reacts with electrodes. Here,...
Water as the main driving force of LiPF<sub>6</sub> degradation increases reaction rate and determines composition products.
A flow-through method for the extraction of lithium-ion battery electrolytes with supercritical and liquid carbon dioxide under addition solvents has been developed optimized to achieve quantitative electrolyte from commercial 18 650 cells.
The further development of lithium ion batteries operating at high voltages requires basic understanding the occurring capacity fade mechanisms. In this work, overall specific loss with regard to reversible and irreversible processes for LiNi1/3Co1/3Mn1/3O2 (NCM111)/Li half cells, cycled a charge cutoff potential 4.6 V vs Li/Li+, has been investigated in detail. By means total X-ray fluorescence (TXRF) technique it was shown that losses associated amount dissolved transition metals are...
The decomposition of state-of-the-art lithium ion battery (LIB) electrolytes leads to a highly complex mixture during cell operation. Furthermore, thermal strain by e.g., fast charging can initiate the degradation and generate various compounds. correlation electrolyte products LIB performance fading over life-time is mainly unknown. electrochemical in comprising 1 m LiPF6 dissolved 13 C3 -labeled ethylene carbonate (EC) unlabeled diethyl investigated corresponding reaction pathways are...