A5004134021- Advanced Battery Materials and Technologies
- Advancements in Battery Materials
- Advanced Battery Technologies Research
- Fuel Cells and Related Materials
- Advanced battery technologies research
- Lattice Boltzmann Simulation Studies
- Electrocatalysts for Energy Conversion
- Electron and X-Ray Spectroscopy Techniques
- Supercapacitor Materials and Fabrication
- Aerosol Filtration and Electrostatic Precipitation
- Extraction and Separation Processes
- Layered Double Hydroxides Synthesis and Applications
- Semiconductor materials and devices
- Advancements in Solid Oxide Fuel Cells
- Digital Image Processing Techniques
- Inorganic Chemistry and Materials
- Advanced Mathematical Modeling in Engineering
- Recycling and Waste Management Techniques
- Smart Grid Energy Management
- Flame retardant materials and properties
- Advanced Physical and Chemical Molecular Interactions
- Advanced Surface Polishing Techniques
- Electric Vehicles and Infrastructure
- Advanced Thermodynamics and Statistical Mechanics
- Silicon Carbide Semiconductor Technologies
Deutsches Zentrum für Luft- und Raumfahrt e. V. (DLR)
2016-2025
Helmholtz-Institute Ulm
2016-2025
Institute of Engineering
2023
Offenburg University of Applied Sciences
2013-2014
Aerospace Institute (Germany)
2014
University of Stuttgart
2009-2014
Aschaffenburg University of Applied Sciences
2013
Most cathode materials for lithium-ion batteries exhibit a low electronic conductivity. Hence, significant amount of conductive graphitic additives are introduced during electrode production. The mechanical stability and connection the is enhanced by mixed phase formed carbon binder materials. However, this phase, domain (CBD), hinders transport lithium ions through electrolyte pore network. Thus, reducing performance at higher currents. In work we combine microstructure resolved simulations...
Abstract The garnet‐type phase Li 7 La 3 Zr 2 O 12 (LLZO) attracts significant attention as an oxide solid electrolyte to enable safe and robust solid‐state batteries (SSBs) with potentially high energy density. However, while progress has been made in demonstrating compatibility metal, integrating LLZO into composite cathodes remains a challenge. current perspective focuses on the critical issues that need be addressed achieve ultimate goal of all‐solid‐state LLZO‐based battery delivers...
Emerging energy storage systems based on abundant and cost-effective materials are key to overcome the global climate crisis of 21st century.
The effect of the mixing and drying process on microstructure ultra‐thick NCM 622 cathodes (50 mg cm −2 , 8 mAh ) its implication for battery performance is investigated. It observed that shear force during significantly influences resulting with regard to binder migration process. Based information extracted from scanning electron microscopy–energy dispersive X‐ray spectroscopy (SEM–EDX) cross sections, carbon domain (CBD) distributed in pore space virtual electrodes generated by a...
The development of high-capacity, high-performance all-solid-state batteries requires the specific design and optimization its components, especially on positive electrode side. For first time, we were able to produce a completely inorganic mixed consisting only LiCoO2 Ta-substituted Li7La3Zr2O12 (LLZ:Ta) without use additional sintering aids or conducting additives, which has high theoretical capacity density 1 mAh/cm2. A true cell composed Li metal negative electrode, LLZ:Ta garnet...
All-solid-state batteries (ASSBs) present a promising route toward safe and high-power battery systems in order to meet the future demands consumer automotive market. Composite cathodes are one way boost energy density of ASSBs compared thin-film configurations. In this manuscript, we investigate composites consisting β-Li3PS4 (β-LPS) solid electrolyte high-energy Li(Ni0.6Mn0.2Co0.2)O2 (NMC622). The fabricated cells show good cycle life with satisfactory capacity retention. Still, cathode...
All-solid-state batteries promise to enable lithium metal anodes and outperform state-of-the-art lithium-ion battery technology. To achieve high capacity, utilization of the active material in cathode must be maximized. Carbon-based conductive additives are known improve capacity rate performance electrode composites. However, their influence on composites all-solid-state is yet not fully understood. Here, we study several carbon with different morphologies surface areas an cell...
Abstract All‐solid‐state batteries promise higher energy and power densities as well increased safety compared to lithium‐ion by using non‐flammable solid electrolytes metallic lithium the anode. Ensuring permanent close contact between components individual particles is crucial for long‐term operation of a solid‐state cell. This study investigates particle size dependent compression mechanics ionic conductivity mechanically soft thiophosphate electrolyte tetragonal Li 7 SiPS 8 ( t ‐LiSiPS)...
All-solid-state batteries have the potential to improve safety, energy-, and power density of lithium-ion batteries. However, limited stability rigid solid-solid interfaces remains a key challenge. The cathode/electrolyte interface is particularly prone degradation during high-temperature sintering electrochemical cycling, forming secondary phases that impede charge transport limit cell performance. Experimental analysis these challenging since they result in thin resistive films are...
Multi-phase management is crucial for performance and durability of electrochemical cells such as batteries fuel cells. In this paper we present a generic framework describing the two-dimensional spatiotemporal evolution gaseous, liquid solid phases, well their interdependence with interfacial (electro-)chemistry microstructure in continuum description. The modeling domain consists up to seven layers (current collectors, channels, electrodes, separator/membrane), each which can consist an...
In this paper we present a model of the discharge lithium–oxygen battery with aqueous electrolyte. Lithium–oxygen batteries (Li–O2) have recently received great attention due to their large theoretical specific energy. Advantages design include stability electrolyte, long experience gas diffusion electrodes (GDEs), and solubility reaction product lithium hydroxide. However, competitive energies can only be obtained if is allowed precipitate. Here dynamic one-dimensional Li–O2 including GDE...
The deposition of a metallic lithium phase on the surface graphite anodes in ion batteries is major degradation process and causes inherent safety risks. Despite its importance for battery applications detection this so-called plating during charge very challenging. Therefore, mechanistic understanding Li mechanism identification characteristic features curve are extremely important. We present an electrochemical model, which enables description dissolution three-dimensional microstructure...
Electrolyte filling is a time-critical step during battery manufacturing that also affects the performance. The underlying physical phenomena mainly occur on pore scale and are hard to study experimentally. In this paper, computational approach, i.e.\ lattice Boltzmann method, used process corresponding pore-scale in 3D lithium-ion cathodes. electrolyte flow through nanoporous binder simulated using homogenization approach. Besides time, influence of structural physico-chemical properties...
Lithium deposition on anode surfaces can lead to fast capacity degradation and decreased safety properties of Li-ion cells. To avoid the critical aging mechanism lithium deposition, its detection is essential. We present workflows for efficient Li electrode cell level. The are based a variety complementary advanced physico-chemical methods which were validated against each other both graphite graphite/Si electrodes: Electrochemical analysis, scanning electron microscopy, glow...
A new homogenization approach for the simulation of multi-phase flows in heterogeneous porous media is presented. It based on lattice Boltzmann method and combines grayscale with multi-component Shan-Chen method. Thus, it mimics fluid-fluid solid-fluid interactions also within pores that are smaller than numerical discretization. The model successfully tested a broad variety single- two-phase flow problems. Additionally, its application to multi-scale problems demonstrated using electrolyte...
Abstract All‐solid‐state batteries are considered as an enabler for applications requiring high energy and power density. However, they still fall short of their theoretical potential due to various limitations. One issue is poor charge transport kinetics resulting from both material inherit limitations non‐optimized design. Therefore, a better understanding the relevant properties cathode microstructure necessary improve cell performance. In this article, we identify optimization potentials...
Abstract All‐solid‐state batteries (ASSBs) offer a promising route to safer with superior energy density compared conventional Li‐ion (LIBs). However, the design of composite cathode and optimization underlying microstructure is one aspects requiring intensive research. Achieving both high power remains challenging due limitations in ionic conductivity active material loading. Using structure‐resolved simulations, we investigate potential perforated layered electrode designs enhance ASSB...
Li redistribution processes within Si-graphite composite (SiG) electrodes are analyzed using in situ and operando X-ray diffraction (XRD), ex light microscopy (LM), optical of cross-sectioned full cells (CS-IOM), 3D microstructure-resolved simulations cells. First, the lithiation behavior graphite SiG (Si content 20.8 wt.-%) is analyzed. The results used as validation methods (XRD, LM, CS-IOM, simulation). Second, between component Si investigated: By XRD measurements during charging...
Solid-state batteries are transformative solutions for electric vehicles, offering superior energy density and safety. Sulfide-based electrolytes like Li₆PS₅Cl (LPSCl) combine high ionic conductivity mechanical adaptability, but challenges remain in scaling up high-performance separator tapes due to particle size distribution (PSD) processing constraints. This study investigates the uni-axial densification of slurry-casted LPSCl tapes, focusing on PSD refinement compaction pressure. Wet...
Nickel‐Manganese‐Cobalt (NMC) oxides are widely used as cathode materials in lithium‐ion batteries. While increasing the nickel content increases available capacity a given voltage window, it also reduces structural stability of material when cycled to high cutoff voltages. Oxygen release from crystal structure well layered‐to‐rocksalt phase transformation layered oxide cause loss and impedance rise. In this work, we propose continuum approach model oxygen associated using 1+1D informed by...
Abstract The growing demand for advanced energy storage systems requires the development of next‐generation battery technologies with superior density and cycle stability, lithium–sulfur (Li–S) batteries representing a promising solution. Sulfur‐containing polyacrylonitrile cathodes (SPAN) Li–S are significant advancement this chemistry, addressing major issue limited life encountered in conventional carbon/sulfur composite cathodes. In presented study, influence available ionic electronic...