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On the role of surface carbonate species in determining the cycling performance of all-solid-state batteries

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Materials Futures 2022年第2期1卷 116-120页

作者： florian Strauss Seyedhosein Payandeh Aleksandr Kondrakov Torsten Brezesinski Battery and Electrochemistry Laboratory(BELLA) Institute of NanotechnologyKarlsruhe Institute of Technology(KIT)Hermann-von-Helmholtz-Platz 176344 Eggenstein-LeopoldshafenGermany BASF SE Carl-Bosch-Str.3867056 LudwigshafenGermany

This short perspective summarizes recent findings on the role of residual lithium present on the surface of layered Ni-rich oxide cathode materials in liquid-and solid-electrolyte based batteries,with emphasis placed on the carbonate *** and future research opportunities in the development of carbonate-containing protective nanocoatings for inorganic solid-state battery applications are also discussed.

关键词： electrochemical energy storage layered oxide cathode materials protective coatings surface contaminants interfacial chemistry

Editorial for the Special Issue on Unmanned Intelligent Cluster

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Engineering 2022年第5期8卷 1-2页

作者： Jun Zhang Toshio Fukuda Defu Lin florian Holzapfel School of Information and Electronics Beijing Institute of TechnologyBeijing 100081China School of Mechatronical Engineering Beijing Institute of TechnologyBeijing 100081China School of Aerospace Engineering Beijing Institute of TechnologyBeijing 100081China Institute of Flight System Dynamics Technical University of MunichGarching 85748Germany

Recent advances in networked cooperative autonomous sys-tems offer the potential to significantly improve system quality for a wide range of *** in embedded processor,sensor,communication,and networking technology in the last few decades has accelerated interest in networked cooperative autonomous systems,multirobot systems,and distributed sensor networks for applications such as manufacturing,logistics,pro-cess monitoring,enhanced situational awareness,plant safety,inspection,security,and rescue operations.

关键词： robot networks autonomous

Anisotropic Visco-Elastoplastic Modeling of Quasi-Unidirectional Flax Fiber Reinforced Epoxy Behavior:An Investigation on Low-Velocity Impact Response

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Journal of Renewable Materials 2018年第5期6卷 464-476页

作者： Marwa Abida Jamel Mars florian Gehring Alexandre Vivet Fakhreddine Dammak Normandie Univ ENSICAENUNICAENCEACNRSCIMAP14000 CaenFrance Mechanical Modeling and Manufacturing Laboratory(LA2MP) National School of Engineers of SfaxUniversity of SfaxB.P 1173-3038SfaxTunisia Laboratory of Electromechanical Systems(LASEM) National Engineering School of SfaxUniversity of SfaxB.P.1173-3038SfaxTunisia

Based on experimental test results,flax fiber reinforced polymer composites are characterized by nonlinear visco-elastoplastic *** aim of this work is to model the quasi-unidirectional flax fiber reinforced composite behavior through a three dimensional formulation with orthotropic elasticity and orthotropic plasticity using Hill *** isotropic hardening and Johnson Cook parameters are identified from unidirectional tensile tests at different strain *** adjustment of Hill’s yield criterion is developed based on yield stresses obtained in tensile tests at different *** numerical integration of the constitutive equations is implemented in a user-defined material,UMAT subroutines for the commercial finite element code *** model parameters are identified using tensile tests,the model needs to be validated by confronting it with other experimental *** is why experimental and numerical three-point bending tests are carried out in order to validate the proposed model with tests that have not served for the ***,a numerical parametric study on low velocity impact of a flax/epoxy composite circular plate is investigated.

关键词： Visco-elastoplasticity anisotropic behavior impact simulation flax fiber composites

Simulation of urban microclimate with uhiSolver:software validation using simplifed material data

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Ecological Processes 2021年第1期10卷 921-943页

作者： florian Teichmann Christina Maria Baumgartner Andras Horvath Markus Luisser Azra Korjenic Vienna University of Technology ViennaAustria. Rheologic GmbH ViennaAustria.

Background:Increasing urbanization as well as global warming requires an investigation of the infuence of diferent construction methods and ground surfaces on the urban heat island efect(UHI efect).The extent of the infuence of the urban structure,the building materials used and their surfaces on the UHI efect can be signifcantly reduced already in the planning phase using a designated OpenFOAM-based solver“uhiSolver”.Results:In the frst part of this research work,it is shown that inner building details and components can be neglected while still obtaining sufciently accurate *** this purpose,the building model was divided into two layers:a surface layer without mass,where the interaction with radiation takes place,and a component layer,which contains all relevant components and cavities of the building represented with mass-averaged material *** has become apparent that the three parameters—albedo,heat capacity and thermal resistance—which have a decisive infuence on the interaction,have diferent efects on the component temperatures and the surface *** the second part of this research work,dynamic 3D computational fuid dynamics(CFD)simulations are performed with uhiSolver for a residential block in *** the simulation results with measurement data collected on site,it is shown that the simplifed assumption of homogeneous material data for building bodies provides very good results for the validation case ***,the infuence of the greening measures in the courtyard of the residential block on the air temperature is found to be ***,it was observed that due to locally higher radiation density,lower air velocities and higher air humidity,the apparent temperature in the courtyard is sometimes perceived to be higher than in the adjacent streets,despite the lower air ***:Simplifying the modeling process of the uhiSolver software by reducing the model complexity helps to reduce

关键词： Urban heat island efect Urban microclimate CFD simulation Microclimate simulation Apparent temperature

Investigation of Acupuncture Effects on Vegetative Brain Centres Using Functional Magnetic Resonance Imaging

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Journal of Acupuncture and Tuina Science 2008年第5期6卷 264-265页

作者： florian Beissner Christian Henke Brain Imaging Center FrankfurtGermany Institute of NeuroradiologyGoethe-UniversityFrankfurtGermany Max-Planck-Institute of BiophysicsFrankfurtGermany Brain Imaging Center FrankfurtGermany Department of NeurologyGoethe-UniversityFrankfurtGermany

FMRI has been used to study acupuncture effects for more than 10 years now. Many investigators have shown activations and deactivations of cortical structures, mostly of the limbic system （amygdala, insula, cingular cortex） that were interpreted as a modulation of the limbic network .As some of these structures also coordinate vegetative functions, recently interest has grown in imaging vegetative brainstem centers.

关键词： Acupuncture Magnetic Resonance Imaging Brain Stem Points, Neiguan (PC 6)

The role of polysulfide-saturation in electrolytes for high power applications of real world Li-S pouch cells

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Nano Research 2023年第6期16卷 8313-8320页

作者： Tom Boenke Sebastian Kirchhoff florian SReuter florian Schmidt Christine Weller Susanne Dörfler Kai Schwedtmann Paul Härtel Thomas Abendroth Holger Althues Jan J.Weig Stefan Kaskel Technische Universität Dresden Chair of Inorganic Chemistry IBergstr.6601069 DresdenGermany Fraunhofer Institute for Material and Beam Technology(IWS) Winterbergstr.2801277 DresdenGermany Technische Universität Dresden Chair of Inorganic Molecular ChemistryMommsenstraße 401069 DresdenGermany

The lithium-sulfur(Li-S)technology is the most promising candidate for next-generation batteries due to its high theoretical specific energy and steady progress for applications requiring lightweight batteries such as aviation or heavy electric *** these applications,however,the rate capability of Li-S cells requires significant *** electrolyte formulations in Li-S batteries enable new pathways for cell development and adjustment of all ***,their rate capability at pouch cell level is often neither evaluated nor compared to state of the art(SOTA)LiTFSI/dimethoxyethane/dioxolane(LITFSI:lithium-bis(trifluoromethylsulfonyl)imide)***,the combination of the sparingly polysulfide(PS)solvating hexylmethylether/1,2-dimethoxyethane(HME/DME)electrolyte and highly conductive carbon nanotube Buckypaper(CNT-BP)with low porosity was evaluated in both coin and pouch cells and compared to dimethoxyethane/dioxolane reference *** advanced sulfur transfer melt infiltration was employed for cathode production with *** Li+ion coordination in the HME/DME electrolyte was investigated by nuclear magnetic resonance(NMR)and Raman ***,ionic conductivity and viscosity was investigated for the pristine electrolyte and a polysulfide-statured *** electrolytes,DME/DOL-1/1(DOL:1,3-dioxolane)and HME/DME-8/2,are then combined with CNT-BP and transferred to multi-layered pouch *** study reveals that the ionic conductivity of the electrolyte increases drastically over state of(dis)charge especially for DME/DOL electrolyte and lean electrolyte regime leading to a better rate capability for the sparingly polysulfide solvating *** evaluation in prototype cells is an important step towards bespoke adaption of Li-S batteries for practical applications.

关键词： lithium-sulfur pouch cell polysulfide solubility electrolyte characterization high power

Assessing stress conditions and impact velocities in fluidized bed opposed jet mills

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Particuology 2020年第6期18卷 12-22页

作者： Alexander Strobel Benedikt Koninger Stefan Romeis florian Schott Karl-Ernst Wirth Wolfgang Peukert Institute of Particle Technology(LFG) Friedrich-Alexander-Universitat Erlangen-NiirnbergCauerstrae 491058 ErlangenGermany

Fluidized bed opposed jet mills are capable of meeting the continuously growing dema nd for contamination-free fine *** this type of jet mill,the solid material is entrained and accelerated by expanding gas jets that are focused onto a focal point in side a fluidized *** resulting particle collisions induce *** process is affected by the relative particle velocities and the number of particle-particle ***,both quantities are ***,to date,neither relative particle velocities nor collision frequencies in such units have been *** present work introduces an innovative method to assess the stressing conditions in jet mills *** this end,mixtures of glass and ductile metal microspheres were used,with the latter employed in small ***-particle collisions between the aluminum and glass spheres lead to the formation of dents on the *** size and number of these dents are associated with the individual collision velocities and overall collision *** correlation between dent size and collision velocity was obtained from finite element calculations based on empirical *** proposed approach was validated using particle image velocimetry during secondary gas injection into a fluidized bed *** this case the effect of the distance between two opposed nozzles was *** a lab-scaled fluidized bed opposed jet mill the effects of gas pressure and hold-up were *** particle velocities were found to be sign ificantly lower tha n the gas velocities,while the nu mber of contacts per particle was determined to be extremely high.

关键词： Fluidized bed opposed jet mill Single particle probes Finite element modeling Stress number distribution Relative velocity distribution

Reflections about the holographic and nonholographic acquisition of surface topography: where are the limits?

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Light(Advanced Manufacturing) 2022年第2期3卷 48-57页

作者： Gerd Häusler florian Willomitzer University of Erlangen Nuremberg Institute of OpticsInformationand Photonics91058 ErlangenGermany Northwestern University Department of Electrical and Computer EngineeringEvanston 60208USA

Recording and(computational)processing of complex wave fields offer a vast realm of new methods for optical 3D *** discuss fundamental similarities and differences between holographic surface topography measurement and non-holographic principles,such as triangulation,classical interferometry,rough surface interferometry and slope measuring *** features are the physical origin of the ultimate uncertainty limit and how the topographic information is encoded and *** the theoretical insight,the discussion will help optical metrologists to determine if their measurement results could be improved or have already hit the ultimate limit of what physics allows.

关键词： Optical metrology Topography Physical limits Holography

The dynamics of PEG-coated nanoparticles in concentrated protein solutions up to the molecular crowding range

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Aggregate 2024年第3期5卷 209-218页

作者： Ferdinand Otto Francesco Dallari Fabian Westermeier D.C.florian Wieland Wolfgang J.Parak Felix Lehmkühler florian Schulz Center for Hybrid Nanostructures Universität HamburgHamburgGermany Department of Physics and Astronomy“Galileo Galilei” University of PadovaPadovaItaly Deutsches Elektronen-Synchrotron DESY HamburgGermany Institute of Metallic Biomaterials Helmholtz-Zentrum HereonGeesthachtGermany The Hamburg Centre for Ultrafast Imaging HamburgGermany

Polymer-coated nanoparticles are widely studied in the context of nanomedicine and it is therefore of utmost importance to understand not only how their struc-ture but also how their colloidal dynamics are affected by physiologically relevant conditions.A characteristic feature of the cytosol of cells is the very high concen-tration of proteins among other matrix components,often termed macromolecular ***,the structure and colloidal dynamics of poly(ethylene glycol)(PEG)-coated gold nanoparticles in the presence of bovine serum albumin(BSA)concentrations ranging from 0 to 265 mg/mL are studied with X-ray photon correla-tion *** protein–nanoparticle mixtures with high BSA concentrations,comparable to intracellular levels,a significant deviation of the apparent viscosity from expectations for pure BSA solutions is *** strongly indicate that the nanoscopic viscous properties of the dense protein solutions are significantly affected by the *** these high concentrations,the colloidal stability of the samples depends on the molecular weight of the coating PEG–ligand,whereas at lower concentrations no differences are observed.

关键词： aggregation nanoparticles PEG polymers proteins XPCS