Batteries - Reaction Kinetics and Optimization
In our group, we are involved in research on lithium-ion and next-generation batteries. An essential part of our work is the deeper understanding of the underlying physical and chemical processes. To gain a deeper insight into these processes, we use synergies between mechanistic modelling and experimental investigations. This enables us to analyse and optimise batteries in terms of performance, ageing properties and safety.
One of our focal points is the investigation of reaction mechanisms and kinetics, starting from the structure of functional boundary layers up to energy conversion and degradation. This includes the description of a cell from its production to cell death.
Accurate chemical as well as electrochemical cell characterization is necessary for a detailed understanding of the underlying processes. Mass spectroscopic measurements, such as DEMS, allow deeper insights into ongoing reactions by determining reaction products. Furthermore, the electrochemical behaviour can be investigated in more detail by means of current-carrying capacity measurements, electrochemical impedance spectroscopy or cyclic voltammetry. In combination with our mechanistic models, these measurement methods allow a holistic understanding of current and future energy storage and energy conversion technologies. Depending on the problem, we can use models with different levels of detail, ranging from atomistic reactions to coupled microscopic/macroscopic descriptions.
In addition, we apply rigorous mathematical optimizations in order to translate the results of these models into practical applications. In collaborations with experts in the field of battery production, process understanding and model-based design proposals can be combined to accelerate progress in both areas.
Current research topics
|Simulation-based optimization of hierarchically structured high-capacity electrodes for Lithium-Ion batteries (HiStructures)||Dion Wilde|
|Experimental investigation of gas evolution and modelling reaction kinetics during thermal runaway of Lithium-Ion batteries (BaSiS)||Lars Bläubaum, Florian Baakes|
|Multi-scale analysis of initial SEI formation on lithium metal (Lillint)||Janika Wagner|
|Modeling and optimisation of All-Solid-State-Batteries for aviation (IMOTHEP)||Somayeh Toghyani|
|Investigation of solid electrolyte interphase (SEI) in Lithium-Ion batteries at elevated temperatures (SiMET)||Michail Gerasimov|
|Model-based cell diagnosis and optimisation with focus on cell formation for Lithium-Ion batteries (DaLion 4.0)||
Daniel Witt (KIT Partner)