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High-Performance Silicon Anodes Enabled by Multifunctional Ultrafine Silica Nanoparticle-Embedded Carbon Coatings for Lithium-Ion Batteries

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Advanced Energy materials 2025年第0期

作者： Sun, Zhefei Yin, Quanzhi Zhou, Shenghui Chen, Haoyu Wen, Sifan Yang, Huiping Wu, Xiaoyu Pan, Jianhai Han, Jiajia Yang, Hui Zhuang, Zilong Feng, Shijie Zhang, Li Peng, Dong-Liang Zhang, Qiaobao State Key Laboratory of Physical Chemistry of Solid Surfaces College of Materials Xiamen University Xiamen361005 China State Key Laboratory of Physical Chemistry of Solid Surfaces College of Chemistry and Chemical Engineering Tan Kah Kee Innovation Laboratory Collaborative Innovation Center of Chemistry for Energy Materials Xiamen University Fujian Xiamen361005 China State Key Laboratory of Material Processing and Die & Mould Technology Department of Mechanics School of Aerospace Engineering Huazhong University of Science and Technology Hubei Wuhan430074 China Department of Mechanical Engineering University of Wisconsin-Madison MadisonWI53706 United States Materials Science and Engineering Program University of California San Diego La JollaCA92093 United States Longmen Laboratory Henan Luoyang471023 China

Silicon (Si) holds immense promise as viable anode for next-generation high-energy-density Li-ion batteries (LIBs). However, its poor ionic/electronic conductivity and significant volumetric changes during cycling lead to rapidly deteriorated LIB performance. Here, a novel multifunctional coating featuring ultrafine SiO2 nanoparticles (2-C) to resolve these challenges is proposed. This unique uSiO2-C coating provides high-efficient electron and ion transport pathways, while also improves interfacial stability and mitigates volume changes during cycling, thereby enhancing the conductivity and structural integrity of Si@uSiO2-C, as corroborated by extensive experimental and computational studies. In addition, the abundant interfaces in uSiO2-C coating facilitate Li+ transport and the evenly distributed ultrafine SiO2 nanoparticles impart high electrochemical reactivity and mechanical robustness. Consequently, the Si@uSiO2-C anode achieves a high reversible capacity of 2093 mAh g−1 at 0.2 A g−1, with a high initial Coulombic efficiency of 88.3%, superior rate capability and durability (1000 cycles, 928 mAh g−1 at 1.0 A g−1, 75% capacity retention). Full cells paired with commercial LiFePO4 cathodes demonstrate high cyclability, maintaining 80% capacity retention over 500 cycles at 4 C. This work highlights the vital role of multifunctional coating in promoting the electrochemical performance of Si-based anodes for high-performance LIBs. © 2025 Wiley-VCH GmbH.

关键词： SiO2 nanoparticles

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Computing Grain Boundary 'Phase' Diagrams

arXiv

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arXiv 2022年

作者： Luo, Jian Department of Nanoengineering Program of Materials Science and Engineering University of California La Jolla San DiegoCA United States

Grain boundaries (GBs) can be treated as two-dimensional (2-D) interfacial phases (also called 'complexions') that can undergo interfacial phase-like transitions. As bulk phase diagrams and calculation of phase diagram (CALPHAD) methods are a foundation for modern materials science, we propose to extend them to GBs to have equally significant impacts. This perspective article reviews a series of studies to compute the GB counterparts to bulk phase diagrams. First, a phenomenological interfacial thermodynamic model was developed to construct GB lambda diagrams to forecast high-temperature GB disordering and related trends in sintering and other properties for both metallic and ceramic materials. In parallel, an Ising-type lattice statistical thermodynamic model was utilized to construct GB adsorption diagrams, which predicted first-order GB adsorption (a.k.a. segregation) transitions and critical phenomena. These two simplified thermodynamic models emphasize on the GB structural (disordering) and chemical (adsorption) aspects, respectively. Subsequently, hybrid Monte Carlo and molecular dynamics atomistic simulations were used to compute more rigorous and accurate GB 'phase' diagrams. Computed GB diagrams of thermodynamic and structural properties were further extended to include mechanical properties. Moreover, machine learning was combined with atomistic simulations to predict GB properties as functions of four independent compositional variables and temperature in a 5-D space for a given GB in high-entropy alloys or as functions of five GB macroscopic (crystallographic) degrees of freedom (DOFs) plus temperature and composition for a binary alloy in a 7-D space. Relevant other studies are examined. Future perspective and outlook, including two emerging fields of high-entropy grain boundaries (HEGBs) and electrically (or electrochemically) induced GB transitions, are discussed. Copyright © 2022, The Authors. All rights reserved.

关键词： Grain boundaries

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Discovery of high-entropy ceramics via machine learning

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npj Computational materials 2020年第1期6卷 1323-1331页

作者： Kevin Kaufmann Daniel Maryanovsky William M.Mellor Chaoyi Zhu Alexander S.Rosengarten Tyler J.Harrington Corey Oses Cormac Toher Stefano Curtarolo Kenneth S.Vecchio Department of NanoEngineering UC San DiegoLa JollaCA 92093USA Department of Cognitive Science UC San DiegoLa JollaCA 92093USA Materials Science and Engineering Program UC San DiegoLa JollaCA 92093USA Department of Mechanical Engineering and Materials Science Duke UniversityDurhamNC 27708USA Materials Science Electrical EngineeringPhysics and ChemistryDuke UniversityDurhamNC 27708USA

Although high-entropy materials are attracting considerable interest due to a combination of useful properties and promising applications,predicting their formation remains a hindrance for rational discovery of new *** approaches are based on physical intuition and/or expensive trial and error *** computational methods rely on the availability of sufficient experimental data and computational *** learning(ML)applied to materials science can accelerate development and reduce *** this study,we propose an ML method,leveraging thermodynamic and compositional attributes of a given material for predicting the synthesizability(i.e.,entropy-forming ability)of disordered metal carbides.

关键词： ceramics entropy attracting

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Deep Brain Optoacoustic Stimulation Enabled by a Multifunctional Fiber-based Optoacoustic Emitter

Deep Brain Optoacoustic Stimulation Enabled by a Multifuncti...

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Optics and the Brain, BRAIN 2022

作者： Zheng, Nan Jiang, Ying Jiang, Shan Li, Yueming Jia, Xiaoting Yang, Chen Cheng, Ji-Xin Division of Materials Science and Engineering Boston University BostonMA02215 United States Graduate Program for Neuroscience Boston University BostonMA02215 United States Photonics Center Boston University BostonMA02215 United States Department of Mechanical Engineering Boston University BostonMA02215 United States Department of Biomedical Engineering Boston University BostonMA02215 United States Department of Chemistry BostonMA02215 United States

Optoacoustic neurostimulation is a non-genetic light-mediated technique allows high precise control of neural activities. Here, we combined optoacoustic stimulation and electrophysiological recording to achieve bidire... 详细信息

ISBN: (纸本)9781957171036

关键词： Electrophysiology

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High-entropy grain boundaries

arXiv

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arXiv 2022年

作者： Luo, Jian Zhou, Naixie Department of Nanoengineering Program of Materials Science and Engineering University of California La Jolla San DiegoCA United States

Do high-entropy alloys and ceramics have their grain boundary (GB) counterparts? As the concept of high-entropy grain boundaries (HEGBs) was initially proposed in 2016, this article provides the first complete and rigorous discussion of the underlying interfacial thermodynamics. A simplified segregation model can illustrate both GB and bulk high-entropy effects, which reduce GB energy with increasing temperature for saturated multicomponent (conventional and high-entropy) alloys. HEGBs can be utilized to stabilize nanocrystalline alloys at high temperatures via thermodynamic and kinetic effects. GB structural disordering and transitions offer further opportunities to attain higher effective GB entropies. Future perspective is discussed. Copyright © 2022, The Authors. All rights reserved.

关键词： Grain boundaries

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Author Correction: Elastic electronics based on micromesh-structured rubbery semiconductor films (vol 5, pg 881, 2022)

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NATURE ELECTRONICS 2023年第1期6卷 86-86页

作者： Guan, Ying-Shi Ershad, Faheem Rao, Zhoulyu Ke, Zhifan da Costa, Ernesto Curty Xiang, Qian Lu, Yuntao Wang, Xu Mei, Jianguo Vanderslice, Peter Hochman-Mendez, Camila Yu, Cunjiang Institute of Advanced Materials and School of Chemistry and Chemical Engineering Southeast University Nanjing China Department of Mechanical Engineering University of Houston Houston TX USA Department of Biomedical Engineering Pennsylvania State University University Park PA USA Department of Biomedical Engineering University of Houston Houston TX USA Department of Engineering Science and Mechanics Pennsylvania State University University Park PA USA Materials Science and Engineering Program University of Houston Houston TX USA Department of Materials Science and Engineering Materials Research Institute Pennsylvania State University University Park PA USA Department of Chemistry Purdue University West Lafayette IN USA Regenerative Medicine Research Texas Heart Institute Houston TX USA Molecular Cardiology Research Laboratory Texas Heart Institute Houston TX USA

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Why Room Temperature GeSn Lasers Need Carbon

Why Room Temperature GeSn Lasers Need Carbon

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IEEE International Conference on Group IV Photonics

作者： Tuhin Dey Augustus W. Arbogast Qian Meng Shamim Reza Aaron Muhowski Joshua Cooper Rachel S. Goldman Thales Borrely Seth R. Bank Mark A. Wistey Materials Science Engineering and Commercialization Program Texas State University San Marcos Texas USA Department of Physics Texas State University San Marcos Texas USA Department of Electrical and Computer Engineering University of Texas at Austin Austin Texas USA Department of Materials Science and Engineering University of Michigan Ann Arbor MI USA Departments of MSE Physics and EECS University of Michigan Ann Arbor MI USA Department of Physics and MSEC Program Texas State University San Marcos Texas USA

Device models show GeSn lasers are limited by weak electron and photon confinement. Adding carbon offers strong conduction band offsets, freeing SiGeSn layers for separate confinement heterostructures, reducing thresh...

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Optimal sandwich panel's core design for an enhanced impact resistance

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Heliyon 2025年第1期11卷 e41211页

作者： Charkaoui, Assil Hassan, Noha M. Bahroun, Zied Materials Science and Engineering Program College of Arts and Sciences American University of Sharjah P.O. Box 26666 Sharjah United Arab Emirates Department of Industrial Engineering College of Engineering American University of Sharjah P.O. Box 26666 Sharjah United Arab Emirates

Despite the extensive literature revealing various core structures that can enhance the impact resistance of composite panels, a comparative study illustrating the difference in performance of the various cores under same loading conditions is missing. The aim of this study is to determine the optimal core structure and design in terms of energy absorption under low-velocity impact using both numerical simulations and experimental testing for validation. Response surface analysis was used to design the experiments and analyse the panel's behaviour. A total of 160 numerical simulations were conducted by varying the core shape, density, number of layers and panel's thickness. Drop tower tests were performed to experimentally validate the results. Additive manufacturing was used to 3D print the tested structures which simplified the manufacturing process. Results provided insights on time to perforation, stiffness of the panels showcasing an inverse relationship between recoverable strain energy and equivalent plastic strain. The number of layers within the panels were identified as a pivotal factor in the energy distribution and tendency for localized plastic deformation to occur. Both numerical and experimental results revealed the superior energy absorption capabilities of the X-frame core shaped structure. Regression models developed shed light on the relationships between core height, volume fraction, number of layers, and core topology revealing the extent of damage. Multi-objective optimization was used to yield optimal configuration for sandwich panels with highest impact resistance. © 2024

关键词： Additive manufacturing Core geometry Energy absorption Impact resistance Optimization Sandwich panels

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Evidence of magnetoelectronic electromagnon mediated transport in flexoelectronic heterostructures

arXiv

引用

arXiv 2023年

作者： Katailiha, Anand Lou, Paul C. Bhardwaj, Ravindra G. Beyermann, Ward P. Kumar, Sandeep Department of Mechanical Engineering University of California RiversideCA92521 United States Department of Physics and Astronomy University of California RiversideCA92521 United States Materials Science and Engineering Program University of California RiversideCA92521 United States

The superposition of atomic vibrations and flexoelectronic effect gives rise to a cross correlation between free charge carriers and temporal magnetic moment of phonons in conducting heterostructures under an applied strain gradient. The resulting dynamical coupling is expected to give rise to quasiparticle excitations called as magnetoelectronic electromagnon that carries electronic charge and temporal magnetic moment. Here, we report experimental evidence of magnetoelectronic electromagnon in the freestanding degenerately doped p-Si based heterostructure thin film samples. These quasiparticle excitations give rise to long-distance (>100µm) spin transport;demonstrated using spatially modulated transverse magneto-thermoelectric and non-local resistance measurements. The magnetoelectronic electromagnons are non-reciprocal and give rise to large magnetochiral anisotropy (0.352 A-1T-1) that diminishes at lower temperatures. The superposition of non-reciprocal magnetoelectronic electromagnons gives rise to longitudinal and transverse modulations in charge carrier density, spin density and magnetic moment;demonstrated using the Hall effect and edge dependent magnetoresistance measurements, which can also be called as inhomogeneous magnetoelectronic multiferroic effect. These quasiparticle excitations are analogues to photons where time dependent polarization and temporal magnetic moment replaces electric and magnetic field, respectively and most likely topological because it manifests topological Nernst effect. Hence, the magnetoelectronic electromagnon can potentially give rise to quantum interference and entanglement effects in conducting solid state system at room temperature in addition to efficient spin transport. © 2023, CC BY.

关键词： Magnetic moments

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Novel spent bleaching earth industrial waste as low-cost ceramic membranes material: elaboration and characterization

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materials Today: Proceedings 2023年 87卷 136-140页

作者： Rahma A. Elma M. Roil Bilad M. Isnasyauqiah Rahman Wahid A. Sirajul Huda M. Resa Lamandau D. Doctoral Program of Environemntal Science Postgraduate Program Lambung Mangkurat University Jl Brigjen H. Hasan Basri Kayutangi South Kalimantan Banjarmasin 70123 Indonesia Materials and Membranes Research Group (M2ReG) Lambung Mangkurat University Jl A. Yani Km 36 South Kalimantan Banajrbaru 70714 Indonesia Chemical Engineering Department Engineering Faculty Lambung Mangkurat University Jl A. Yani Km 36 South Kalimantan Banajrbaru 70714 Indonesia Faculty of Integrated Technologies Universiti Brunei Darussalam Gedung BE1410 Brunei Darussalam

Ceramic membrane support derived from spent bleaching earth (SBE) become a novel study due to their low-cost, sustainable features, abundance material, and there is not yet applicated as membrane. In this study, flat disk ceramic membrane configuration was fabricated and characterized from solid waste of crude palm oil bleaching process by pressing method in different SBE loading mass (38–42 %wt.). The SBE as raw material was deoiled using n-hexane and acetone solvent, followed by fabricated it become flat disk SBE membranes. Afterward, the SBE flat disk membranes was characterized through fourier-transform infrared spectroscopy (FTIR) and X-ray fluorescence (XRF) analyzer. The result exhibits the flat disk SBE ceramic membrane has dimension of 41 and 6 mm for diameter and thickness, respectively. SBE membranes indicating have montmorillonite structure due to presence of silica as main component materials of SBE. Besides that, the existence of siloxane vibration band in SBE membranes for the sample after regeneration with n-hexane and acetone were dominated over using raw SBE. It concludes the oil residue was removed and produced SBE membrane properties become robust with less organic contaminant. © 2023

关键词： Ceramic membrane CPO Pressing method SBE Support

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