A5053287358- Fuel Cells and Related Materials
- Advanced Battery Materials and Technologies
- Advanced Battery Technologies Research
- Advancements in Battery Materials
- Dielectric materials and actuators
- Ferroelectric and Piezoelectric Materials
- Solid-state spectroscopy and crystallography
- Thermal Expansion and Ionic Conductivity
- Supercapacitor Materials and Fabrication
- Hybrid Renewable Energy Systems
- Semiconductor materials and devices
- Dielectric properties of ceramics
- Advanced battery technologies research
- Advanced Memory and Neural Computing
- Advanced biosensing and bioanalysis techniques
- Fiber-reinforced polymer composites
- Graphene research and applications
- Electronic and Structural Properties of Oxides
- Glass properties and applications
- Extraction and Separation Processes
- Optical Coatings and Gratings
- Ionic liquids properties and applications
- Anodic Oxide Films and Nanostructures
- Intermetallics and Advanced Alloy Properties
- Microwave Dielectric Ceramics Synthesis
Fraunhofer Institute for Wind Energy Systems
2023-2024
TU Bergakademie Freiberg
2014-2024
Fraunhofer Institute for Microengineering and Microsystems
2024
Fraunhofer Institute for Microstructure of Materials and Systems
2021
Martin Luther University Halle-Wittenberg
2011-2014
Max Planck Institute of Microstructure Physics
2010-2013
Max Planck Society
2009
The great potential for medical applications of inorganic nanoparticles in living organisms is severely restricted by the concern that can harmfully interact with biological systems, such as lipid membranes or cell proteins. To enable an uptake cells without harming their membranes, platinum were synthesized within cavities hollow protein nanospheres (apoferritin). In vitro, protein-platinum show good catalytic efficiency and long-term stability. Subsequently particles tested after...
Besides a continuous increase of the worldwide use electricity, electric energy storage technology market is growing sector. At latest since German transition ("Energiewende") was announced, technological solutions for renewable have been intensively studied. Storage technologies in various forms are commercially available. A widespread electrochemical cell. Here cost per kWh, e. g. determined by density, production process and cycle life, main interest. Commonly, an cell consists anode...
In this work we demonstrate the synthesis of monocrystalline silicon nanowire using silver particles as catalysts at temperatures less than 500 °C by means ultrahigh vacuum chemical vapor deposition. The nanowires were grown epitaxially on substrates and had diameters about 10 nm. We furthermore show that remnants can be wet chemically removed with potassium ferricyanide sodium thiosulfate.
With the constant growth of lithium battery market and introduction electric vehicles stationary energy storage solutions, low abundance high price will greatly impact its availability in future. Thus, a diversification electrochemical technologies based on other source materials is great relevance. Sodium energetically similar to but cheaper more abundant, which results some already established concepts, such as Na-S ZEBRA cells. The most significant bottleneck for these find effective...
Increase in grain connectivity and Li content improves ionic conductivity Y-modified LAGP glass-ceramics.
Composite thin films of surface functionalized CaCu<sub>3</sub>Ti<sub>4</sub>O<sub>12</sub> prepared by spin-coating show a fivefold increase the relative permittivity compared to pure P(VDF-HFP) polymer.
A selective and specific inhibition of the catalase mimetic activity but not SOD-like Pt-apoferritin can be achieved through choice inhibitor. The recovery using a reducing agent was explored proven to successfully restore surface-chemistry NPs.
BaTiO<sub>3</sub>–P(VDF-HFP) composite films without surface functionalization show a tenfold increase of the relative permittivity compared to pure polymer.
Oxygen migration in perovskites is well known to occur via vacancies along the TiO6 octahedron edges. Ionic conduction depends further on orientation of crystal electric field. To study anisotropy cubic SrTiO3 single crystals, temperature-dependent electroformation measurements ranging from 11 °C 50 have been conducted for representative crystallographic directions within system. Electroformation pure follows an Arrhenius behavior, implying ionic process intrinsic oxygen defects. Activation...
Commercial electrochemical capacitors (supercapacitors) are not limited to mobile electronics anymore, but have reached the field of large-scale applications, like smart grid, wind turbines, power for large scale ground, water and aerial transportation, energy-efficient industrial equipment others. This review gives a short overview current state-of-the-art capacitors, their commercial applications impact technological development on performance.
We have scanned the inorganic crystal structure database using Voronoi‐Dirichlet methodology for inorganic, crystalline, solid Na electrolytes and applied a total of nine different crystallographic economic parameters in order to evaluate potential each material. Especially stationary electrochemical energy storage — used counteract capricious nature renewable sources momentary variations consumption Na‐based chemistries considerable market share. They rely on separating S electrode...
The fabrication and characterization of an Au-free Ti/Al/TiN (20/100/100 nm) contact stack to unintentionally doped n-GaN with TiN serving as the diffusion barrier is presented. Sputter deposition lift-off in combination post annealing at 850 °C are used for formation. After annealing, shows ohmic behavior a specific resistivity 1.60 × 10−3 Ω cm2. To understand formation on microscopic scale, was characterized by current–voltage measurements, linear transmission line method, X-ray...
We investigated the insertion–extraction behaviors of Li and Na ions in graphitic materials using solid-state NMR. A unique advantage high-degree 13C-isotope enrichment material allowed sensitive metastable graphite intercalation compounds to be measured a short time. Ex situ 13C magic-angle spinning NMR spectra fine-grained are presented as function state-of-charge. The observations discussed with respect phenomena, which include effects charge transfer demagnetizing field. Dramatic...
In situ studies of electrochemical processes using NMR offer valuable information on reaction mechanisms, kinetics, and species identification, making it a powerful tool in electrochemistry research. this study, we present the design an redox-flow cell that allows for continuous flow liquid (electrolyte) or gas, application electrical voltage, recording signals. The utility setup is demonstrated through two case studies: copper deposition gold electrode conversion carbon dioxide into...
Abstract Titanium polymer composites are evaluated concerning their suitability as bipolar plates in acid water electrolysis a replacement of milled plates. It turns out that our highly filled with 80 wt.-% powder meet all criteria given by US Department Energy electric conductivity and mechanical stability. Concerning the electrochemical corrosion test, an improved behavior is obtained coating 0.5 $$\mu$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mi>μ</mml:mi>...
Efficient composite dielectrics can be created by combination of phase free Ba(Ti<sub>(1−x)</sub>Ge<sub>x</sub>)O<sub>3</sub> nanoparticles, and an inorganic BBS glass matrix, consisting BaO, B<sub>2</sub>O<sub>3</sub> SiO<sub>2</sub>.
A novel class of resource‐efficient, woven‐glass‐grid current collectors (CCs) for Li‐ion batteries is introduced. These CCs are based on ultra‐light multifilament glass threads, woven to a grid and surrounded with thin metal layer (equivalent 1 µm‐thick foil) in roll‐to‐roll physical vapor deposition process. This saves > 90% the required Cu Al metals reduces mass by 80%. At same time, gravimetric capacity anodes graphite cathodes LiCoO2 active material increases 48% 14%, respectively,...