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Characterization and quantification of multi-field coupling in lithium-ion batteries under mechanical constraints

Journal of Energy Chemistry 2024年第8期95卷 364-379页

作者： Xue Cai Caiping Zhang Zeping Chen Linjing Zhang Dirk uwe Sauer Weihan Li National Active Distribution Network Technology Research Center Beijing Jiaotong University Chair for Electrochemical Energy Conversion and Storage Systems Institute for Power Electronics and Electrical Drives(ISEA) RWTH Aachen University Center for Ageing Reliability and Lifetime Prediction of Electrochemical and Power Electronic Systems(CARL) Juelich Aachen Research Alliance JARA-Energy Helmholtz Institute Münster(HI MS)

The safety and durability of lithium-ion batteries under mechanical constraints depend significantly on electrochemical, thermal, and mechanical fields in applications. Characterizing and quantifying the multi-field coupling behaviors requires interdisciplinary efforts. Here, we design experiments under mechanical constraints and introduce an in-situ analytical framework to clarify the complex interaction mechanisms and coupling degrees among multi-physics fields. The proposed analytical framework integrates the parameterization of equivalent models, in-situ mechanical analysis, and quantitative assessment of coupling behavior. The results indicate that the significant impact of pressure on impedance at low temperatures results from the diffusion-controlled step, enhancing kinetics when external pressure, like 180 to 240 k Pa at 10 °C, is applied. The diversity in control steps for the electrochemical reaction accounts for the varying impact of pressure on battery performance across different temperatures. The thermal expansion rate suggests that the swelling force varies by less than 1.60% per unit of elevated temperature during the lithiation process. By introducing a composite metric, we quantify the coupling correlation and intensity between characteristic parameters and physical fields, uncovering the highest coupling degree in electrochemical-thermal fields. These results underscore the potential of analytical approaches in revealing the mechanisms of interaction among multi-fields, with the goal of enhancing battery performance and advancing battery management.

关键词： Lithium-ion battery Muti-field coupling Mechanical constraints Interaction mechanisms Quantitative analysis

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Anisotropic magnetoelastic response in the magnetic Weyl semimetal Co_(3)Sn_(2)S_(2)

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Science China(Physics,Mechanics & Astronomy) 2021年第5期64卷 82-90页

作者： Chang Liu ChangJiang Yi XingYu Wang JianLei Shen Tao Xie Lin Yang Tom Fenne uwe stuhr ShiLiang Li HongMing Weng YouGuo Shi EnKe Liu HuiQian Luo Beijing National Laboratory for Condensed Matter Physics Institute of PhysiesChinese Academy of SciencesBeijing 100190China School of Physical Sciences University of Chinese Academy of SciencesBejing 100190China Laboratory for Neutron Scattering and Imaging Paul Scherrer InstituteVlligen CH-5232Switzerland Songshan Lake Materials Laboratory Dongguan 523808China SCAS Centre for Excelence in Topological Quantum Computation Bejing 100190China Physical Science Laboratory Huairou National Comprehensive Science CenterBeijing 101400China

Co_(3)Sn_(2)S_(2) is a recently identified magnetic Weyl semimetal in Shandite compounds. Upon cooling, Co_(3)Sn_(2)S_(2) undergoes a ferromagnetic transition with c-axis polarized moments(0.3 μ_(B)/Co) around T_(C)= 175 K, followed by another magnetic anomaly around T_(A)≈ 140 K. A large intrinsic anomalous Hall effect is observed in the magnetic state below TC with a maximum of anomalous Hall angle near T_(A). Here, we report an elastic neutron scattering on the crystalline lattice of Co_(3)Sn_(2)S_(2) in a magnetic field up to 10 T. A strongly anisotropic magnetoelastic response is observed, while only a slight enhancement of the Bragg peaks is observed when B//c. The in-plane magnetic field(B//ab) dramatically suppresses the Bragg peak intensity probably by tilting the moments and lattice toward the external field direction. The in-plane magnetoelastic response commences from T_(C), and as it is further strengthened below T_(A), it becomes nonmonotonic against the field between T_(A) and T_(C) because of the competition from another in-plane magnetic order. These results suggest that a magnetic field can be employed to tune the Co_(3)Sn_(2)S_(2) lattice and its related topological states.

关键词： Weyl semimetal magneto-elastic coupling topological materials elastic neutron scattering ferromagnetism

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Dispersion of neutron spin resonance mode in Ba_(0.67)K_(0.33)Fe_(2)As_(2)

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Chinese Physics B 2021年第12期30卷 1-6页

作者：谢涛刘畅 Tom Fennell uwe stuhr 李世亮罗会仟 Beijing National Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of SciencesBeijing 100190China School of Physical Sciences University of Chinese Academy of SciencesBeijing 100190China Laboratory for Neutron Scattering and Imaging Paul Scherrer InstitutCH-5232 Villigen PSISwitzerland Songshan Lake Materials Laboratory Dongguan 523808China

We report an inelastic neutron scattering investigation on the spin resonance mode in the optimally hole-doped ironbased superconductor Ba_(0.67)K_(0.33)Fe_(2)As_(2)with T_c=38.2 K.Although the resonance is nearly two-dimensional with peak energy ER≈14 meV,it splits into two incommensurate peaks along the longitudinal direction([H,0,0])and shows an upward dispersion persisting to 26 meV.Such dispersion breaks through the limit of total superconducting gaps△_(tot)=|△k|+|△k+Q|(about 11-17 meV)on nested Fermi surfaces measured by high resolution angle resolved photoemission spectroscopy(ARPES).These results cannot be fully understood by the magnetic exciton scenario under s^(±)-pairing symmetry of superconductivity,and suggest that the spin resonance may not be restricted by the superconducting gaps in the multi-band systems.

关键词： iron-based superconductor neutron spin resonance magnetic excitations

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Dispersion of neutron spin resonance mode in Ba0.67K0.33Fe2As2

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Chinese Physics B 2021年第12期30卷 605-610页

作者：谢涛刘畅 Tom Fennell uwe stuhr 李世亮罗会仟 Beijing National Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of Sciences School of Physical Sciences University of Chinese Academy of Sciences Neutron Scattering Division Oak Ridge National Laboratory Laboratory for Neutron Scattering and Imaging Paul Scherrer Institut Songshan Lake Materials Laboratory

We report an inelastic neutron scattering investigation on the spin resonance mode in the optimally hole-doped ironbased superconductor Ba0.67K0.33Fe2As2with Tc= 38.2 K. Although the resonance is nearly two-dimensional with peak energy ER ≈14 meV, it splits into two incommensurate peaks along the longitudinal direction([H, 0, 0]) and shows an upward dispersion persisting to 26 meV. Such dispersion breaks through the limit of total superconducting gaps ?tot= |?k| + |?k+Q|(about 11–17 meV) on nested Fermi surfaces measured by high resolution angle resolved photoemission spectroscopy(ARPES). These results cannot be fully understood by the magnetic exciton scenario under s±-pairing symmetry of superconductivity, and suggest that the spin resonance may not be restricted by the superconducting gaps in the multi-band systems.

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Urban livability in socially disadvantaged neighborhoods: The experience of the German program “socially integrative city”

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Frontiers of Architectural Research 2022年第5期11卷 783-794页

作者： uwe Altrock Department of Urban Regeneration and Planning Theory University of Kassel34125KasselGermany

This paper asks how the livability of socially disadvantaged urban neighborhoods can be improved with the help of publicly funded area-based urban regeneration.It builds on the history of area-based regeneration policies in Germany aiming at upgrading and resolving urban problems at the neighborhood level.Its main argument is as follows.First,the fate of conventional physical upgrading policies focusing on the livability of deprived urban areas depends on the development environment.While successful upgrading sometimes makes inner-city neighborhoods so attractive that they run into a trend towards gentrification and displacement of the urban poor,the stabilization of less privileged areas cannot always be guaranteed.Second,alternative approaches are needed,linking limited physical upgrading with socially oriented policies,building on strategies like neighborhood management and empowerment.Third,they can make a substantial contribution to stabilizing deprived neighborhoods,thereby improving the general living conditions and the opportunities of the urban poor.However,they require at least some permanent intervention.Thus,they transcend the logic of area-based regeneration normally limited to restoring faith into the private real estate market and thereby directing inward investment into them that improves the quality of the physical environment.Fourth,they are hardly able to overcome significant negative stigmatization in cities that are severely hit by economic downturn and population decline.This is especially true when they act as arrival areas for consecutive waves of migrants,making it necessary to redefine the role of those areas in cities and accepting their high concentration of urban problems as a starting point for different area-based policies dealing with them.The key empirical background of the paper is the German system of urban development grants and an evaluation of the so-called program of“socially integrative city”.

关键词： Urban regeneration Livability Socially integrative urban development Disadvantaged neighborhoods

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A novel role for mitochondrial fission in macrophages: trained innate immunity induced by beta-glucan

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Cellular & Molecular Immunology 2023年第8期20卷 864-866页

作者： Anna Brichkina Hans-uwe Simon Institute of Systems Immunology Center for Tumor Biology and ImmunologyPhilipps University of Marburg35043MarburgGermany Member of the German Center for Lung Research(DZL) Philipps University of Marburg35043MarburgGermany Laboratory of Molecular Immunology Institute of Fundamental Medicine and BiologyKazan Federal University420012KazanRussia Institute of Pharmacology University of Bern3010BernSwitzerland Institute of Biochemistry Brandenburg Medical School16816NeuruppinGermany

In a recent paper published in Nature Immunology,Ding et al.provided new insights into the mechanism of how trained innate immunity could eradicate cancer.The authors demonstrated that yeast-derived whole beta-glucan particles(WGP)increased the responsiveness of lung interstitial macrophages to tumor-derived factors associated with the subsequent inhibition of tumor metastasis through enhanced cytotoxicity to cancer cells.The authors identified the metabolic sphingolipid–mitochondrial fission axis in WGP-trained macrophages as the key pathway responsible for this phenomenon and categorized it as a mechanism of trained innate immunity[1].

关键词： subsequent insight immunity

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High non-photochemical quenching of VPZ transgenic potato plants limits CO_(2) assimilation under high light conditions and reduces tuber yield under fluctuating light

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Journal of Integrative Plant Biology 2022年第9期64卷 1821-1832页

作者： Günter G.Lehretz Anja Schneider Dario Leister uwe Sonnewald Department of Biology Division of BiochemistryFriedrich-Alexander-University Erlangen-NürnbergStaudtstrasse 5Erlangen91058 Germany Plant Molecular Biology Faculty of BiologyLudwig Maximilians University of MunichGroßhaderner Str.2-482152 Planegg-MartinsriedMunichGermany

Under natural conditions,photosynthesis has to be adjusted to fluctuating light intensities.Leaves exposed to high light dissipate excess light energy in form of heat at photosystem II(PSII)by a process called non-photochemical quenching(NPQ).Upon fast transition from light to shade,plants lose light energy by a relatively slow relaxation from photoprotection.Combined overexpression of violaxanthin de-epoxidase(VDE),PSII subunit S(PsbS)and zeaxanthin epoxidase(ZEP)in tobacco accelerates relaxation from photoprotection,and increases photosynthetic productivity.In Arabidopsis,expression of the same three genes(VPZ)resulted in a more rapid photoprotection but growth of the transgenic plants was impaired.Here we report on VPZ expressing potato plants grown under various light regimes.Similar to tobacco and Arabidopsis,induction and relaxation of NPQ was accelerated under all growth conditions tested,but did not cause an overall increased photosynthetic rate or growth of transgenic plants.Tuber yield of VPZ expressing plants was unaltered as compared to control plants under constant light conditions and even decreased under fluctuating light conditions.Under control conditions,levels of the phytohormone abscisic acid(ABA)were found to be elevated,indicating an increased violaxanthin availability in VPZ plants.However,the increased basal ABA levels did not improve drought tolerance of VPZ transgenic potato plants under greenhouse conditions.The failure to benefit from improved photoprotection is most likely caused by a reduced radiation use efficiency under high light conditions resulting from a too strong NPQ induction.Mitigating this negative effect in the future might help to improve photosynthetic performance in VPZ expressing potato plants.

关键词： drought photosynthesis potato non-photochemical quenching xanthophyll cycle

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Understanding source-sink interactions: Progress in model plants and translational research to crops

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Molecular Plant 2023年第1期16卷 96-121页

作者： Laise Rosado-Souza Ryo Yokoyama uwe Sonnewald Alisdair R.Fernie Max-Planck-Institute of Molecular Plant Physiology Am Mühlenberg 114476 Potsdam-GolmGermany Department of Biochemistry University of Erlangen-NurembergStaudtstrasse 591058 ErlangenGermany

Agriculture is facing a massive increase in demand per hectare as a result of an ever-expanding population and environmental deterioration.While we have learned much about how environmental conditions and diseases impact crop yield,until recently considerably less was known concerning endogenous factors,including within-plant nutrient allocation.In this review,we discuss studies of source-sink interactions covering both fundamental research in model systems under controlled growth conditions and how the findings are being translated to crop plants in the field.In this respect we detail efforts aimed at improving and/or combining C3,C4,and CAM modes of photosynthesis,altering the chloroplastic electron transport chain,modulating photorespiration,adopting bacterial/algal carbon-concentrating mechanisms,and enhancing nitrogen-and water-use efficiencies.Moreover,we discuss how modulating TCA cycle activities and primary metabolism can result in increased rates of photosynthesis and outline the opportunities that evaluating natural variation in photosynthesis may afford.Although source,transport,and sink functions are all covered in this review,we focus on discussing source functions because the majority of research has been conducted in this field.Nevertheless,considerable recent evidence,alongside the evidence from classical studies,demonstrates that both transport and sink functions are also incredibly important determinants of yield.We thus describe recent evidence supporting this notion and suggest that future strategies for yield improvement should focus on combining improvements in each of these steps to approach yield optimization.

关键词： photosynthesis assimilate transport nitrogen-use efficiency water-use efficiency source-sink natural variance transgenic intervention

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Neurophysiological correlates of interference control and response inhibition processes in children and adolescents engaging in open-and closed-skill sports

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Journal of Sport and Health Science 2022年第2期11卷 224-233页

作者： Sebastian Ludyga Manuel Mücke Christian Andra Markus Gerber uwe Pühse Department of Sport Exercise and HealthUniversity of BaselBasel 4052Switzerland Department of School Sport Leipzig UniversityLeipzig 04109Germany

Background:Accumulating evidence suggests that sports participation promotes the development of inhibitory control,but the influences of the sports category and inhibition type still remain unclear.The categorization of sports based on the open-skill(externally paced)and closed-skill(self-paced)continuum allows for the integration of the environment as a factor contributing to sports-related benefits for inhibitory control.Methods:Cross-sectional data from different studies were combined(n=184)to examine the association between open-and closed-skill sports and cognitive control processes related to interference control and response inhibition.Participants(aged 9-14 years)filled in 7-day physical activity recall protocols and completed a Stroop Color-Word or a Go/NoGo task.The N200,N450,and P300 components of event-related potentials elicited by these tasks were recorded using electroencephalography.Results:Partial correlations supported the belief that time spent in open-skill sports was related to higher performance on inhibition trials.Additionally,path analyses revealed an association between this sports type and a greater negativity in the N200 and N450 amplitudes in both the full sample and group-level analyses.In contrast,no relation was found between sports type and P300 amplitude.Conclusion:The findings suggest that only the engagement in open-skill sports is associated with more effective conflict monitoring and higher performance on tasks demanding inhibitory control.

关键词： Conflict monitoring Event-related potentials Exercise Go/NoGo Stroop Color-Word Physical activity

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A simple guideline to apply excitation-emission matrix spectroscopy(EEMs)for the characterization of dissolved organic matter(DOM)in anoxic marine sediments

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Acta Oceanologica Sinica 2023年第1期42卷 109-119页

作者： Shuchai Gan Verena BHeuer Frauke Schmidt Lars Wörmer Kai-uwe Hinrichs MARUM—Center for Marine Environmental Sciences University of BremenBremenD-28359Germany

Marine sediments represent a major carbon reservoir on Earth.Dissolved organic matter(DOM)in pore waters accumulates products and intermediates of carbon cycling in sediments.The application of excitation-emission matrix spectroscopy(EEMs)in the analysis of subseafloor DOM samples is largely unexplored due to the redox-sensitive matrix of anoxic pore water.Therefore,this study aims to investigate the interference caused by the matrix on EEMs and propose a guideline to prepare pore water samples from anoxic marine sediments.The parameters determined by fluorescence spectra include 3D-index derived from EEMs after parallel factor analysis(PARAFAC),fluorescence index(FI)(contribution of terrigenous DOM),biological index(BIX)and humification index(HIX)derived from 2D emission spectra.First,we investigated the impacts of extensively-presented ions as typical electron acceptors,which are utilized by anaerobic microbes and stratified in marine sediments:Fe(II),Fe(III),Mn(II)and sulfide in anoxic pore water resulted in biases of fluorescent signals.We proposed threshold concentrations of these ions when the interference on EEMs occurred.Effective removal of sulfide from sulfide-rich samples could be achieved by flushing with N_(2)for 2 min.Second,the tests based on DOM standard were further verified using pristine samples from marine sediments.There was a significant change in the fluorescence spectra of DOM in anoxic sediments from the Rhône Delta.This study demonstrated that the change was caused by oxidation of the matrix rather than the intrinsic alteration of DOM.It was confirmed by extracted DOM via both EEMs analysis and Fourier transform ion cyclotron resonance mass spectrometry(FT-ICR-MS).Slight oxidation of sulfur-containing compounds(e.g.,sulfhydryl)and polyphenol-like compounds occurred.Finally,a sample preparation sequence is proposed for pore water from anoxic sediments.This method enables measurement with small volumes of the sample(e.g.,50µL in this study)and ensures reliable data without the interference

关键词： marine subsurface sediment EEMs PARAFAC FT-ICR-MS anaerobic pore water

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