A5072831450- Advancements in Battery Materials
- Advanced Battery Materials and Technologies
- Advanced Battery Technologies Research
- Bone Tissue Engineering Materials
- Ion-surface interactions and analysis
- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Bone health and osteoporosis research
- Orthopaedic implants and arthroplasty
- Analytical chemistry methods development
- Extraction and Separation Processes
- Bone health and treatments
- Dental Implant Techniques and Outcomes
- Organometallic Complex Synthesis and Catalysis
- Bone Metabolism and Diseases
- Metal-Catalyzed Oxygenation Mechanisms
- Supercapacitor Materials and Fabrication
- Inorganic Chemistry and Materials
- Graphene and Nanomaterials Applications
- Mass Spectrometry Techniques and Applications
- Multiple Myeloma Research and Treatments
- Chemical Synthesis and Characterization
- Metal complexes synthesis and properties
- Orthopedic Infections and Treatments
- Bacterial Identification and Susceptibility Testing
Justus-Liebig-Universität Gießen
2016-2025
Universitätsklinikum Gießen und Marburg
2013
To significantly increase the energy density of lithium-based batteries, use lithium metal as an anode is option despite all associated challenges. Due to its high reactivity, covered with a passivation layer that may affect cell performance and reproducibility electrochemical characterization. In most studies, this ignored used without considering carrying out proper characterization surface. Against background, we systematically characterized various samples X-ray photoelectron...
Enabling lithium metal is key toward maximizing the energy density of solid-state batteries (SSBs) with a solid electrolyte (SE) as separator. However, formation pores at LiǀSE interface during stripping and short-circuiting cathodic plating through dendrite growth hinder stable cycling higher current density. The bulk microstructure SEs govern mechanism hence maximum or critical (CCD) an SE can sustain before shorting. Herein, via control grain size Li6PS5Cl (LPSCl), we show that be...
Abstract Silicon is a promising anode material due to its high theoretical specific capacity, low lithiation potential and lithium dendrite risk. Yet, the electrochemical performance of silicon anodes in solid-state batteries still poor (for example, actual capacity fast decay), hindering practical applications. Here chemo-mechanical failure mechanisms composite Si/Li 6 PS 5 Cl solid-electrolyte-free are revealed by combining structural chemical characterizations with simulations. The growth...
Solid-state batteries (SSBs) with high-voltage cathode active materials (CAMs) such as LiNi1-x-y Cox Mny O2 (NCM) and poly(ethylene oxide) (PEO) suffer from "noisy voltage" related cell failure. Moreover, reports on their long-term cycling performance CAMs are not consistent. In this work, we verified that the penetration of lithium dendrites through solid polymer electrolyte (SPE) indeed causes voltage failure". This problem can be overcome by a simple modification SPE using higher...
The first objective was to investigate new bone formation in a critical-size metaphyseal defect the femur of ovariectomized rats filled with strontium modified calcium phosphate cement (SrCPC) compared (CPC) and empty defects. Second, detection release from materials as well collagen mass distribution fracture should be targeted by time flight secondary ion spectrometry (TOF-SIMS). 45 female Sprague-Dawley were randomly assigned three different treatment groups: (1) SrCPC (n = 15), (2) CPC...
All-solid-state lithium metal batteries using thiophosphate solid electrolytes (SE) present a promising alternative to state-of-the-art lithium-ion due their potentially superior energy and power. However, reactions occurring at the | SE interface result in an increasing internal resistance limited cycle life. A stable polymer electrolyte (SPE) may be used as protective interlayer prevent from direct contact reaction with metal. This creates new rarely studied heteroionic between inorganic...
To overcome current challenges of lithium metal anodes (LMAs), which hinder their wide industrial application, the chemical composition surface is an important factor. Due to its high reactivity and depending on pre-treatment during processing, covered with a passivation layer composed mainly Li2CO3, LiOH, Li2O, what mostly neglected in later electrochemical studies. Here, we investigate effect storage time conditions commercial foils, based characterization X-ray photoelectron spectroscopy...
Abstract Solid‐state batteries with a lithium metal anode (LMA) are promising candidates for the next generation of energy storage systems high and power density. However, successful implementation LMA requires deeper insight into metal–solid electrolyte (Li|SE) interface. Since is highly reactive, reaction products form when it comes contact most solid electrolytes (SEs) resulting interphase can have detrimental effects on cell performance. To better understand formation interphases, Li|SE...
Lithium-metal batteries with a solid electrolyte separator are promising for advanced battery applications, however, most electrolytes show parasitic side reactions at the low potential of lithium metal. Therefore, it is essential to understand how much (and fast) charge consumed in these reactions. In this study, new electrochemical method presented characterization occurring on active metal electrode surfaces. The viability demonstrated so-called anode-free stainless steel ∣ Li6PS5Cl Li...
Time-of-flight secondary ion mass spectrometry (ToF-SIMS) is a powerful analytical technique whose application has great potential for battery research and that today not used at its full potential. The goal of this article to encourage researchers add ToF-SIMS their toolbox incite experts collaborate more strongly with researchers. It is, therefore, addressed both new experienced operators. First, an introduction the analysis given, in which fundamental operating principle most common...
Abstract Thiophosphate‐based solid‐state batteries (SSBs) with high‐nickel ternary cathode materials such as LiNi 0.83 Co 0.11 Mn 0.06 O 2 (NCM) represent a promising next‐generation energy storage technology due to their expected high specific discharge capacity and improved safety. However, rapid fading caused by contact loss through interphase crack formation during cell cycling is significant problem hindering stable SSB high‐energy‐density applications. In this work, uniform coating of...
Abstract Residual lithium compounds (RLCs) are known to form on the surface of nickel‐rich LiNi 1‐x‐y Co x Mn y O 2 (NCM) oxides during synthesis and storage. In this study, impact RLCs cathode performance in sulfide‐based all‐solid‐state batteries (ASSBs) is investigated by employing practically relevant approaches generate (or remove) from) NCM single crystal particles. It revealed that Li CO 3 predominant component samples exposed air. Surprisingly, heat treatment at high temperatures...
It is crucial to understand at which potentials electrolyte decomposition reactions start and chemical species are present in the subsequently formed films, e.g., solid interphase (SEI). Herein, a new operando experimental approach introduced investigate such by employing hard X-ray photoelectron spectroscopy (HAXPES). This enables examination of SEI below thin metal film (e.g., 6 nm nickel) acting as working electrode an electrochemical cell with sulfide-based Li6PS5Cl electrolyte....
Time-of-flight secondary ion mass spectrometry (ToF-SIMS) is a well-established technique in material sciences but has not yet been widely explored for implementation life sciences. Here, we demonstrate the applicability and advantages of ToF-SIMS analysis study minerals biomolecules osseous tissue. The locally resolved fragment ions deriving from sample surface enables imaging differentiation bone tissue facilitates histology on non-stained cross sections. In rat model, bilateral...
Abstract Due to their high theoretical energy densities and superior safety, thiophosphate‐based all‐solid‐state batteries (ASSBs) are considered as promising power source for electric vehicles. However, large‐scale industrial applications, interfacial degradation between high‐voltage cathode active materials (CAMs) solid‐state electrolytes (SSEs) needs be overcome with a simple, cost‐effective solution. Surface coatings, which prevent the direct physical contact CAM SSE in turn stabilize...
Cubic InGaN alloys are a promising candidate material for next-generation optoelectronic applications as they lack internal fields and promise to cover large parts of the electromagnetic spectrum from deep UV toward mid-infrared. This demands high-quality epitaxial growth cubic InGaN/GaN quantum wells, especially red energy range. However, indium-bearing nitride wells in metastable phase still poses many challenges. GaN typically grown at different temperatures with metal fluxes molecular...
Within this study, the authors use human mesenchymal stem cells incubated with silver nanoparticles (AgNPs) as a model system to systematically investigate advantages and drawbacks of fast imaging delayed extraction mode for two-dimensional three-dimensional (3D) analyses at cellular level. The compare commonly employed measurement modes in terms mass lateral resolution, intensity, dose density. Using single cell analysis, high resolution up 4000 m/z = 184.08 combined 360 nm is achieved....
A method is described for high-resolution label-free molecular imaging of human bone tissue. To preserve the lipid content and heterogeneous structure osseous tissue, 4 μm thick sections were prepared via cryoembedding tape-assisted cryosectioning, circumventing application organic solvents a decalcification step. protocol comparative mass spectrometry (MSI) on same section was established initial analysis with time-of-flight secondary ion (TOF-SIMS) at lateral resolution 10 to <500 nm,...
All solid-state batteries offer the possibility of increased safety at potentially higher energy densities compared to conventional lithium-ion batteries. In an all-ceramic oxide battery, composite cathode consists least one ion-conducting solid electrolyte and active material, which are typically densified by sintering. this study, reaction Li1.3Al0.3Ti1.7(PO4)3 (LATP) material LiNi0.6Co0.2Mn0.2O2 (NCM622) is investigated cosintering temperatures between 550 650 °C. The characterization...
Single-crystalline Ni-rich LiNi 1- x - y Co Mn O 2 (SC-NCM) cathode active materials promise to increase the lifetime of high energy Li-ion batteries. SC-NCM consist large primary particles that offer low surface area, limiting detrimental chemical reactions while exhibiting morphological stability. A typical synthesis starts from same Ni (OH) and LiOH∙H precursors commonly used for conventional spherical poly-crystalline NCM (PC-NCM), but requires higher temperatures additional...
Detailed knowledge about contamination and passivation compounds on the surface of lithium metal anodes (LMAs) is essential to enable their use in all-solid-state batteries (ASSBs). Time-of-flight secondary ion mass spectrometry (ToF-SIMS), a highly surface-sensitive technique, can be used reliably characterize status LMAs. However, as ToF-SIMS data are usually complex, manual analysis difficult time-consuming. In this study, machine learning techniques, especially logistic regression (LR),...
Detailed mechanistic studies on the ligand hydroxylation reaction mediated by a copper bis(imine) complex are presented. Starting from structural analysis of CuI and CuII product with hydroxylated ligand, optical absorption vibrational spectra starting material analyzed. Kinetic shows that O2 binding is rate-limiting step. The proceeds much faster in methanol than acetonitrile. Moreover, an inverse kinetic isotope effect (KIE) evidenced for acetonitrile, which attributed to sterically...