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Insights into the kinetics–morphology relationship of 1-, 2-, and 3D TiNb_(2)O_(7) anodes for Li-ion storage

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Nano Research 2024年第4期17卷 2770-2780页

作者： Wenlei Xu Yaolin Xu Veronika Grzimek Andrea Martin Thorsten Schultz Patrícia ARusso Yan Lu Norbert koch Nicola Pinna Department of Chemistry IRIS Adlershof and the Center for the Science of Materials BerlinHumboldt-Universität zu BerlinBrook-Taylor-Str.212489 BerlinGermany Department of Electrochemical Energy Storage Helmholtz-Zentrum Berlin für Materialien und EnergieHahn-Meitner-Platz 114109 BerlinGermany Institut für Physik and IRIS Adlershof Humboldt-Universität zu BerlinBrook-Taylor-Str.212489 BerlinGermany Joint Research Group of Molecular Systems Helmholtz-Zentrum Berlin für Materialien und Energie12489 BerlinGermany

Understanding the influence of electrode material’s morphology on electrochemical behavior is of great significance for the development of rechargeable batteries,however,such studies are often limited by the inability to precisely control the morphology of electrode ***,nanostructured titanium niobium oxides(TiNb_(2)O_(7))with three different morphologies(one-dimensional(1D),two-dimensional(2D),and three-dimensional(3D))were synthesized via a facile microwave-assisted solvothermal *** influence of the morphological dimension of TiNb_(2)O_(7) as electrode material on the electrochemical performance in Li-ion batteries(LIBs)and the underlying correlation with the electrochemical kinetics were studied in detail.2D TiNb_(2)O_(7)(TNO-2D)shows a superior rate capability and cycling stability,associated with improved kinetics for charge transfer and Li-ion diffusion,compared to the 1D and 3D *** X-ray diffraction measurements reveal the structural stability and crystallographic evolution of TNO-2D upon lithiation and delithiation and correlate the Li-ion diffusion kinetics with the lattice evolution during battery charge and ***,carbon-coated TNO-2D achieves enhanced rate capability(205 mAh·g^(-1) at 50 C)and long-term cycling stability(87%after 1000 cycles at 5 C).This work provides insights into the rational morphology design of electrode materials for accelerated charge transfer and enhanced fast-charging capability,pushing forward the development of electrode materials for high-power rechargeable batteries in future energy storage.

关键词： morphological dimension electrochemical kinetics lithium-ion batteries TiNb_(2)O_(7) structural evolution

Gate-controlled supercurrent effect in dry-etched Dayem bridges of non-centrosymmetric niobium rhenium

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Nano Research 2024年第7期17卷 6575-6581页

作者： Jennifer koch Carla Cirillo Sebastiano Battisti Leon Ruf Zahra Makhdoumi Kakhaki Alessandro Paghi Armen Gulian Serafim Teknowijoyo Giorgio De Simoni Francesco Giazotto Carmine Attanasio Elke Scheer Angelo Di Bernardo Department of Physics University of KonstanzUniversitätsstraße 1078464 KonstanzGermany CNR-Spin c/o Universitàdegli Studi di Salernovia Giovanni Paolo II 13284084 Fisciano(SA)Italy NEST Istituto Nanoscienze-CNR and Scuola Normale SuperiorePiazza San Silvestro 1256127 PisaItaly Dipartimento di Fisica“E.R.Caianiello” Universitàdegli Studi di SalernoVia Giovanni Paolo II 13284084 Fisciano(SA)Italy Advanced Physics Laboratory Institute for Quantum StudiesChapman UniversityBurtonsvilleMD 20866USA

The application of a gate voltage to control the superconducting current flowing through a nanoscale superconducting constriction,named as gate-controlled supercurrent(GCS),has raised great interest for fundamental and technological *** gain a deeper understanding of this effect and develop superconducting technologies based on it,the material and physical parameters crucial for the GCS effect must be ***-down fabrication protocols should also be optimized to increase device scalability,although studies suggest that top-down fabricated devices are more resilient to show a ***,we investigate gated superconducting nanobridges made with a top-down fabrication process from thin films of the noncentrosymmetric superconductor niobium rhenium with varying ratios of the constituents(NbRe).Unlike other devices previously reported and made with a top-down approach,our NbRe devices systematically exhibit a GCS effect when they were fabricated from NbRe thin films with small grain size and etched in specific *** observations pave the way for the realization of top-down-made GCS devices with high *** results also imply that physical parameters like structural disorder and surface physical properties of the nanobridges,which can be in turn modified by the fabrication process,are crucial for a GCS observation,providing therefore also important insights into the physics underlying the GCS effect.

关键词： superconductivity non-centrosymmetric superconductors superconducting devices gated devices gate-controlled supercurrent top-down fabrication

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摩天大楼的公共性——范德比尔特一号大楼

当代建筑 2024年第4期 96-105页

作者：无 Raimund koch(摄影) Michael Moran/OTTO(摄影) Evan Joseph Studios(摄影) KPF建筑设计事务所

范德比尔特一号大楼改变了大中央区的公众体验,成为纽约市的门户,每天迎接成千上万的通勤者。该项目为城市最大的交通枢纽之一——纽约中央车站(以下简称“大中央车站”)引入了新的可通行路径,比任何其他建筑能更好地融入城市的公共交... 详细信息

范德比尔特一号大楼改变了大中央区的公众体验,成为纽约市的门户,每天迎接成千上万的通勤者。该项目为城市最大的交通枢纽之一——纽约中央车站(以下简称“大中央车站”)引入了新的可通行路径,比任何其他建筑能更好地融入城市的公共交通网络,实现了私人企业和公共领域的结合。一个复杂的地下结构连接了大中央车站、东侧通道项目和纽约地铁。一个优雅的城市基座,包括一个活跃的行人广场和综合交通大厅,使这个项目成为21世纪洛克菲勒中心的继承者。

关键词：办公楼以公共交通为导向开发低碳足迹超高层公私合作开发

Corrigendum to“Towards a business model for second-life batteries:Barriers,opportunities,uncertainties,and technologies”[*** Chem.78(2023)507–525]

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Journal of Energy Chemistry 2024年第4期91卷 684-684页

作者： Carlos Antônio Rufino Júnior Eleonora Riva Sanseverino Pierluigi Gallo Daniel koch Yash Kotak Hans-Georg Schweiger Hudson Zanin Advanced Energy Storage Division New Energy Innovation CenterUniversity of Campinas(UNICAMP)Campinas 13083-852Brazil Engineering Department University of Palermo(UNIPA)Palermo 90128Italy Consorzio Nazionale Interuniversitario per le Telecomunicazioni(CNIT) Parma 43124Italy Technische Hochschule Ingolstadt Institute for ElectricConnected and Safe Mobility(C-ECOS)Ingolstadt 85049Germany

In the Acknowledgments Section,please replace“Shell oil”for“TotalEnergies”.The authors would like to apologise for any inconvenience *** the sake of clarity(“Shell oil”should be removed and in boldblack“TotalEn... 详细信息

关键词： please replace removed

Distribution Control Centers in the US and Europe:Commonalities,Differences,and Lessons

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Journal of Modern Power Systems and Clean Energy 2022年第2期10卷 259-268页

作者： Subramanian Vadari Izudin Dzafic Dan'l koch Ryan Murphy Daniel Hayes Jr. Tarik Donlagic Modem Grid Solutions New YorkUSA University of Sarajevo Faculty of Electrical EngineeringSarajevoBosnia and Herzegovina R.Murphy are with Puget Sound Energy BellevueUSA Commonwealth Edison ChicagoUSA Siemens AG ErlanglenGermany

The distribution control center(DCC)has evolved from a sideshow in the traditional distribution service center to a major centerpiece of the utility moving into the decentralized ***,this is the place where much of the action is happening due to new forms of energy that are coining into the distribution *** creates the flexibility of operation and in-creased complexity due to the need for increased coordination between the transmission control center and ***,the US and European utilities have adapted to this change in very different ***,we describe the research works done in a DCC and their evolutions from the perspectives of major US utilities,and those enhanced by the European perspective focusing on the coordination of distribution system operator and transmission system operator(DSO-TSO).We pres-ent the insights into the systems used in these control centers and the role of vendors in their *** this paper,we present the perspectives of challenges,operational capabilities,and the involvement of various parties who will be re-sponsible to make the transition *** differences are pointed out on how distribution operations are conducted between the US and Europe.

关键词： Distribution control center(DCC) power system operation distributed generation asset flexibility volt-var optimization and control.

Self-consistent Maxwell–Bloch model for highorder harmonic generation in nanostructured semiconductors

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Photonics Research 2022年第9期10卷 2099-2106页

作者： ANTON RUDENKO MARIA K.HAGEN JÖRG HADER STEPHAN W.koch JEROME V.MOLONEY Arizona Center for Mathematical Sciences and Wyant College of Optical Sciences University of ArizonaTucsonArizona 85721USA Department of Physics and Material Sciences Center Philipps-Universität MarburgMarburg 35032Germany

In pursuit of efficient high-order harmonic conversion in semiconductor devices,modeling insights into the complex interplay among ultrafast microscopic electron–hole dynamics,nonlinear pulse propagation,and field confinement in nanostructured materials are urgently ***,a self-consistent approach coupling semiconductor Bloch and Maxwell equations is applied to compute transmission and reflection high-order harmonic spectra for finite slab and sub-wavelength nanoparticle *** increase in the generated high harmonics by several orders of magnitude is predicted for gallium arsenide nanoparticles with a size maximizing the magnetic dipole *** as a conceptual and predictive tool for ultrafast spatiotemporal nonlinear optical responses of nanostructures with arbitrary geometry,our approach is anticipated to deliver new strategies for optimal harmonic manipulation in semiconductor metadevices.

关键词： harmonic Bloch Maxwell

Conditional Generative Adversarial Networks for modelling fuel sprays

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能源与人工智能(英文) 2023年第2期12卷 62-75页

作者： Cihan Ates Farhad Karwan Max Okraschevski Rainer koch Hans-Jörg Bauer Karlsruhe Institute of Technology(KIT) Institute of Thermal TurbomachineryGermany Karlsruhe Institute of Technology(KIT) Machine Intelligence in Energy SystemsGermany

In this study, the probabilistic, data driven nature of the generative adversarial neural networks (GANs)was utilized to conduct virtual spray simulations for conditions relevant to aero engine combustors. Themodel consists of two sub-modules: (i) an autoencoder converting the variable length droplet trajectories intofixed length, lower dimensional representations and (ii) a Wasserstein GAN that learns to mimic the latentrepresentations of the evaporating droplets along their lifetime. The GAN module was also conditioned withthe injection location and the diameters of the droplets to increase the generalizability of the whole *** training data was provided from highly resolved 3D, transient Eulerian–Lagrangian, large eddy simulationsconducted with OpenFOAM. Neural network models were created and trained within the open source machinelearning framework of PyTorch. Predictive capabilities of the proposed method was discussed with respect tospray statistics and evaporation dynamics. Results show that conditioned GAN models offer a great potentialas low order model approximations with high computational efficiency. Nonetheless, the capabilities of theautoencoder module to preserve local dependencies should be improved to realize this potential. For the currentcase study, the custom model architecture was capable of conducting the simulation in the order of secondsafter a day of training, which had taken one week on HPC with the conventional CFD approach for the samenumber of droplets (200,000 trajectories).

关键词： Generative Adversarial Networks Generative learning Fuel injection Aero engines Multivariate time series

Insensitive high explosives:Ⅳ. Nitroguanidine-Initiation & detonation

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Defence Technology（防务技术） 2019年第4期15卷 467-487页

作者： Ernst-Christian koch Lutradyn-Energetic Materials

This paper reviews the detonative properties of low bulk density(LBD),high bulk density(HBD)Nitroguanidine(NGu)(1),CAS-No:[556-88-7]and 82 explosive formulations based on NGu reported in the public *** rank the performance of those formulations they are compared with 15 reference compositions containing both standard high explosives such as octogen(HMX)(2),hexogen(RDX)(3),pentaerythritol tetranitrate(PETN)(4),2,4,6-trinitrotoluene(TNT)(5)as well as insensitive high explosives such as 3-nitro-1,2,4-triazolone(NTO)(6),1,3,5-triamino-2,4,6-trinitrobenzene(TATB)(7),1,1-diamino-2,2-dinitroethylene(FOX-7)(8)and N-Guanylurea dinitramide(FOX 12)(9).NGu based formulations are superior to those based on FOX-12 or TATB and are a close match with FOX-7 based explosives,the latter just having higher Gurney Energies(-10%)and slightly higher detonation pressure(+2%).NGu based explosives even reach up to 78% of the detonation pressure,82% Gurney energy and up to 95% of detonation velocity of ***-NGu dissolves in many melt cast eutectics forming dense charges thereby eliminating the need for costly High Bulk Density *** based formulations are at the rock bottom of sensitiveness among all the above-mentioned explosives which contributes to the safety of these *** review gives 132 references to the public *** a review on the synthesis spectroscopy and sensitiveness of Nitroguanidine see Ref.[1].

关键词： Cook-off Detonation Insensitive munitions Nitroguanidine Shock sensitvity

Special materials in pyrotechnics Ⅶ: Pyrotechnics used in thermal batteries

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Defence Technology（防务技术） 2019年第3期15卷 254-263页

作者： Ernst-Christian koch Lutradyn Energetic Materials Science & Technology

Thermal batteries are unique direct current(DC) electrical power sources with long shelf live, high reliability and higher power density than classical alkaline batteries. This paper gives a brief overview into the working principle of thermal batteries and reviews the properties of zirconium/barium chromate(Zr/BaCrO4) pyrolant previously used as first fire and iron/potassium perchlorate(Fe/KClO4) pyrolant(Heat), commonly applied as heating pellet in thermal batteries and its hazard properties. The review gives 64 references to the public domain. CAS-Nos. Zr: [7440-67-7], BaCrO4: [10294-40-3], Fe: [7439-89-6], KClO4: [7778-74-7], Viton: [9011-17-0].CAS-Nos. Zr: [7440-67-7], BaCrO4: [10294-40-3], Fe: [7439-89-6], KClO4: [7778-74-7], Viton: [9011-17-0].

关键词： Barium chromate Heat-powder Iron Lithium Molten salt Potassium perchlorate Pyrotechnics Thermal battery Zirconium