A5092991647- Semiconductor materials and devices
- Advancements in Semiconductor Devices and Circuit Design
- Advancements in Battery Materials
- Advanced Battery Technologies Research
- Advanced Battery Materials and Technologies
- Inorganic Chemistry and Materials
- Integrated Circuits and Semiconductor Failure Analysis
- Ammonia Synthesis and Nitrogen Reduction
- Diamond and Carbon-based Materials Research
- X-ray Diffraction in Crystallography
- Silicon Carbide Semiconductor Technologies
- Silicon and Solar Cell Technologies
- Crystallization and Solubility Studies
- Semiconductor materials and interfaces
- Ion-surface interactions and analysis
- Layered Double Hydroxides Synthesis and Applications
- Radiation Effects in Electronics
- Catalytic Alkyne Reactions
- Advanced Condensed Matter Physics
- Cyclopropane Reaction Mechanisms
- stochastic dynamics and bifurcation
- Neural dynamics and brain function
- Metal and Thin Film Mechanics
- Inorganic Fluorides and Related Compounds
- Laser-Ablation Synthesis of Nanoparticles
Samsung (South Korea)
2010-2024
University of Kassel
2018-2020
Karlsruhe Institute of Technology
2017-2019
Fraunhofer Institute for Industrial Engineering
2018
Technische Universität Berlin
2010-2017
University of Münster
2016
Fraunhofer Institute for Microelectronic Circuits and Systems
2011-2014
Fraunhofer Society
2012
Robert Bosch (Netherlands)
2010
Robert Bosch (Germany)
2010
In the near future, targets for lithium-ion batteries concerning specific energy and cost can advantageously be met by introducing layered LiNixCoyMnzO2 (NCM) cathode materials with a high Ni content (x ≥ 0.6). Increasing allows utilization of more lithium at given cell voltage, thereby improving capacity but expense cycle life. Here, capacity-fading mechanisms both typical low-Ni NCM = 0.33, NCM111) high-Ni 0.8, NCM811) cathodes are investigated compared from crystallographic...
We discuss synchronization patterns in networks of FitzHugh-Nagumo and leaky integrate-and-fire oscillators coupled a two-dimensional toroidal geometry. A common feature between the two models is presence fast slow dynamics, typical characteristic neurons. Earlier studies have demonstrated that both when nonlocally one-dimensional ring produce chimera states for large range parameter values. In this study, we give evidence plethora various shapes, including spots, rings, stripes, grids,...
The ability of the mayenite lattice to incorporate a multiplicity foreign anions offers possibility develop new types anion electrolytes as potential functional materials for sensors, fuel cells, electronic devices or ion emitters.
δ-TaON was prepared by reaction of gaseous ammonia with an amorphous tantalum oxide precursor. As a representative the anatase structure (aristotype) it crystallizes in tetragonal crystal system lattice parameters = 391.954(16) pm and c 1011.32(5) pm. At temperatures between 800 850 °C irreversible phase transformation to baddeleyite-type β-TaON is observed. While quantum-chemical calculations confirm metastable character δ-TaON, its kinetically controlled. The anion distribution...
Silicon-on-Insulator (SOI) is the most commonly used technology for integrated circuits capable of operating at high temperature. Due to efficient reduction leakage current paths much higher operation temperatures are achievable with SOI than bulk technologies. Published work on temperature CMOS typically refers technologies a minimum feature size 0.8 1.0 micron [1][2][3] even though complex digital this results in large die size. Technologies smaller available but not suitable reliable due...
We have developed a new kinetic lattice Monte Carlo modeling framework for Si/Ge selective epitaxial growth based on neighbor binding interactions within the third-nearest-neighbor range of diamond lattice. find that first- and second-nearest-neighbor contribute significantly to faceting between {100} {111}, while interaction is cause {311} facet formation. The also facilitates lateral island formation plane. simulated kinetics shapes are in good agreement with experimental data.
Abstract The framework structure of O-mayenite (Ca 12 Al 14 O 33 ) allows the substitution extra oxygen anions by various anions. In this study we present two new anion substituted phases. Oxidation CN-mayenite leads to formation NO 2 -mayenite and, in addition, there are some hints a very unusual species N-mayenite: hydrazide anion.
Abstract New routes to vanadium sesquioxide and tantalum oxide nitride (γ- δ-phase) are presented. Phase pure V 2 O 3 with bixbyite-type structure, a metastable polymorph, was obtained from fluoride hydrates at ~750 K. It crystallizes in the cubic crystal system space group <m:math xmlns:m="http://www.w3.org/1998/Math/MathML"> <m:mrow> <m:mi>I</m:mi> <m:mi>a</m:mi> <m:mover accent="true"> <m:mn>3</m:mn> <m:mo>¯</m:mo> </m:mover> </m:mrow> </m:math> $Ia\bar 3$ lattice parameter =939.30(5) pm....
Doping of Ni-rich LNMC cathode materials with tungsten via solid-state route has been shown to stabilize the against structural degradation at high voltages during electrochemical cycling. Here we use a wet-chemical doping method homogeneously introduce 0.5 mol% into dense NMC811 (Li[(Ni 0.8 Mn 0.1 Co )]O 2 ), followed by detailed and characterization. A homogeneous distribution W in was evidenced elemental mapping TOF-SIMS. The increase bond-dissociation energy oxygen (BDEO) transition...
Highly dense arrays of diamond nanopillars have been fabricated using nanocrystalline films (NCD) as the starting material.The fabrication process consisted electron beam lithography (EBL), aluminum mask deposition and inductively coupled O 2 plasma reactive ion etching.The EBL pattern fidelity was enhanced by proximity corrections dose variations.Optical characterizations indicated incorporation silicon-vacancy centers during NCD growth well fluorescence photoluminescence intensities in...
Ni-rich, cathode active materials such as Li[Ni 0.8 Mn 0.1 Co ]O 2 (NMC811) suffer from capacity fade, especially at higher upper cut-off voltages. There is an increasing interest on dopants Mo or Ta a promising for high-Ni materials. In this study four with Li[(Ni 0.78 0.11 ) 1−x M x (NMC811, = 0, 0.005, 0.007, 0.013; Ta) were synthesized via batch co-precipitation synthesis followed by calcination. To increase the probability of homogeneous distribution dopant, highly porous hydroxide...
Fast-charging infrastructure with charging time of 20–30 min can help minimizing current perceived limitations electric vehicles, especially considering the unbalanced and incomprehensive distribution options combined a long time. Positioned on optimal location from user business perspective, technology is assumed to increasing usage an vehicle (EV). Considering perspectives, potential EV users were interviewed in two different surveys about fast-charging locations depending travel purposes...
A fabrication process of dense arrays one‐dimensional diamond nanostructures (diamond nanopillars) integrated on nanocrystalline (NCD) membranes is implemented with an etched‐through marker hole in the membrane center array. NCD films deposited silicon substrates are used as starting material. The main steps consist structuring film by electron beam lithography (EBL) applying aluminum a hard mask and subsequent inductively coupled O 2 plasma reactive ion etching (ICP RIE), followed substrate...