Aging Characteristics Of Lithium-Ion Battery Under Fast Charging Based On Electrochemical-Thermal-Mechanical Coupling Model,
2024
School of Mechanical and Automotive Engineering, Shanghai University of Engineering Science Longteng Road 333, Shanghai 201620, PR China
Aging Characteristics Of Lithium-Ion Battery Under Fast Charging Based On Electrochemical-Thermal-Mechanical Coupling Model, Dong-Xu Zuo, Pei-Chao Li
Journal of Electrochemistry
The aging characteristics of lithium-ion battery (LIB) under fast charging is investigated based on an electrochemical-thermal-mechanical (ETM) coupling model. Firstly, the ETM coupling model is established by COMSOL Multiphysics. Subsequently, a long cycle test was conducted to explore the aging characteristics of LIB. Specifically, the effects of charging (C) rate and cycle number on battery aging are analyzed in terms of nonuniform distribution of solid electrolyte interface (SEI), SEI formation, thermal stability and stress characteristics. The results indicate that the increases in C rate and cycling led to an increase in the degree of nonuniform distribution of SEI, and thus …
Chinese Chemical Society: First Young Scholars' Symposium On Electrosynthesis Held Successfully,
2024
Chinese Chemical Society | Xiamen University
Chinese Chemical Society: First Young Scholars' Symposium On Electrosynthesis Held Successfully, Chinese Society Of Electrochemistry (Cse)
Journal of Electrochemistry
No abstract provided.
Study Of Regularities Of Formation Of Hydroxyammonium Oligomers From Alkanolamine Of The Type Of Hexahydrosimtriazine And Epichlorohydrin,
2024
Tashkent Institute of Chemical Technology, Tashkent, Uzbekistan
Study Of Regularities Of Formation Of Hydroxyammonium Oligomers From Alkanolamine Of The Type Of Hexahydrosimtriazine And Epichlorohydrin, Nozima M. Ibragimova, Ravshan I. Adilov
CHEMISTRY AND CHEMICAL ENGINEERING
The aim of the work is to study the patterns of formation of hydroxylammonium oligomers based on hexahydrosymtriazine with epichlorohydrin. The paper studies the interaction patterns of the alkanolamine hexahydrosimtriazine type - N, N', N'-tris (β-oxyethyl) hexahydro-S-triazine (THOHST)with epichlorohydrin (ECH). The reaction between TOEGT and ECH occurs at a noticeable rate, already at 0 oC. An increase in the reaction duration leads to a symbate increase in the molecular weight values, the concentration of hydrolyzed chlorine, a decrease in the content of epoxy groups, and the concentration of hydroxyl groups do not change within the experimental error. An increase …
O-Xloratsetiltimol Sintezi Va Uni Kimyoviy Modifikatsiyalash,
2024
Karshi State University, Karshi, Uzbekistan
O-Xloratsetiltimol Sintezi Va Uni Kimyoviy Modifikatsiyalash, Azimjon U. Choriev, Anvar K. Abdushukurov, Ilyos U. Normurodov, Sarvinoz K. Mirzayeva
CHEMISTRY AND CHEMICAL ENGINEERING
The aim of the study is to develop a convenient method for the synthesis of O-chloroacetylthymol and to propose the mechanism of the O-chloroacetylation reaction. Thin-layer chromatography of chloroacetylation and nucleophilic substitution reaction products was studied and their composition was confirmed by reference substances. Nucleophilic exchange reactions of O-chloroacetylthymol with sodium oxalate, sodium tartrate, potassium rhodanides were studied. Favorable conditions for carrying out the nucleophilic exchange reaction were searched and 3 new substances unknown in the literature were synthesized. The structure of the synthesized substances was proved by IR and NMR spectra.
Study Of Crystallization Ability Of Glasses Synthesized In The Basalt-Quartz-Soda System,
2024
Tashkent Institute of Chemical Technology, Tashkent, Uzbekistan
Study Of Crystallization Ability Of Glasses Synthesized In The Basalt-Quartz-Soda System, Eldor I. Ruzmatov, Mastura Kh. Aripova, Bahrom R. Ro'ziboyev
CHEMISTRY AND CHEMICAL ENGINEERING
The aim of the work is to study the crystallization capacity of glasses synthesized in the basalt-quartz-soda system. The crystallization capacity of glasses was studied by the method of mass crystallization in the range of 600 oC and 1050 oC. The stages of spontaneous crystallization were determined by the DTA method. The density, TCLE, refractive index, compressive strength and frost resistance were studied. The crystalline phases of crystallized glasses were determined by the X-ray phase method. The presence of diopside and anorthite was revealed.
Influence Of The Granulometric Composition Of Carbonate Rocks On Glass Formation Processes In Float Glass Technology,
2024
Belarusian State Technological University, Minsk, Belarus Minsk, Belarus
Influence Of The Granulometric Composition Of Carbonate Rocks On Glass Formation Processes In Float Glass Technology, Sergey P. Grechuha, Yury G. Pavliukevich, Ludmila F. Pаpko, Olesya M. Mozhdzher, Aleksandr P. Kravchuk
CHEMISTRY AND CHEMICAL ENGINEERING
The aim of this work is to study the influence of the granulometric composition of dolomite and limestone of 0.1–1.0 mm, 1.0–1.6 mm, 1.6–2.5 mm fractions on the rate of glass formation processes in the synthesis of float glass. The dependence of the degree of decarbonization of dolomite and limestone on the dispersion of particles and the time of heat treatment has been established. According to the study of the influence of the granulometric composition of carbonate rocks on the melting characteristic of float glass, it can be concluded that it is possible to use the 1.0–1.6 mm fraction of …
Antibacterial Semi-Fritted Glazes Containing Iron (Iii) And Manganese (Iv) Oxides,
2024
Belarusian State Technological University, Minsk, Belarus
Antibacterial Semi-Fritted Glazes Containing Iron (Iii) And Manganese (Iv) Oxides, Ivan A. Levitskiy, Mihail V. Dyadenko, Ekaterina E. Trusova
CHEMISTRY AND CHEMICAL ENGINEERING
The aim of this research work is production of colored antibacterial glaze coatings for ceramic products containing iron (III) and manganese (IV) oxides. The coatings are produced on the basis of multicalcium aluminoborosilicate frit, dolomite and iron or manganese oxides. The constant components in the raw mixture were feldspar, alumina, coal clay and kaolin. The coatings were obtained by finely grinding the components then applied to the dried semi-finished product and single fired at a temperature of 1200±5 °C for 60±2 minutes. The formation of the glaze layer, the decorative properties of coatings, and their physical and chemical and operational …
Synthesis Of Nanostructured Cerium-Doped Yttrium-Aluminum Garnets By Method Of Sol-Gel Burning In A Microwave Oven,
2024
Sukhoi State Technical University of Gomel, Gomel, Belarus
Synthesis Of Nanostructured Cerium-Doped Yttrium-Aluminum Garnets By Method Of Sol-Gel Burning In A Microwave Oven, Eygeniy N. Poddenezhny, Andrei A. Boiko, Ekaterina E. Trusova, Ekaterina R. Kravcova
CHEMISTRY AND CHEMICAL ENGINEERING
The aim of research is to study the new method of thermochemical synthesis of yttrium-aluminum garnet luminescent powder, cerium doped (Y3Al5O12:Се3+, YAG:Ce) using the nitric acid salts of yttrium, aluminum and cerium, with the mixture of carbamide and hexamethylenetetramine used as fuel. Synthesis was performed in a microwave oven with the power of 800 W and frequency of 2450 MHz in a porcelain crucible closed with a perforated heat-resistant cover. The average size of coherent scattering region (CSR) of YAG:Ce particles (nominal diameter D) obtained in the crucible during the microwave heating …
Polyvinyl Alcohol–Red Cabbage Nanofibers As Ph-Responsive Freshness Sensors For Advanced Food Packaging Technology,
2024
Nanotechnology of Food Study Program, Polytechnic of AKA Bogor, Bogor 16154, Indonesia
Polyvinyl Alcohol–Red Cabbage Nanofibers As Ph-Responsive Freshness Sensors For Advanced Food Packaging Technology, Foliatini Foliatini, Singgih Wibowo, Henny Rochaeni, Suhartini Suhartini, Fachrurrazie Fachrurrazie, Arzzaq Imanda Prianditya, Pradnadia Putri Hadriansyah, Naura Athira Putri Siregar, Novi Nurpadilah, Putri Alfiani, Maudi Rahim, Endah Sriwahyuni
Makara Journal of Science
The development of innovative food packaging technologies, particularly those capable of monitoring freshness, has become increasingly important in the food industry. This research explores the development of a pH-responsive freshness sensor using polyvinyl alcohol–red cabbage (PVA/RC) nanofibers. The nanofibers are fabricated through the electrospinning technique and meticulously analyzed via scanning electron microscopy, Fourier-transform infrared (FTIR) spectroscopy, and differential scanning calorimetry (DSC). The results underscore the fine structure of the nanofiber matrix, with an average diameter of ~68 nm. FTIR analysis substantiates the presence of anthocyanin compounds from RC within the PVA/RC nanofibers, which confirms the integration of beneficial components into …
Experimental Examination Of Enhanced Nanoceramic-Based Self-Cleaning Sprays For High-Efficiency Hydrophobic Photovoltaic Panels,
2024
The British University in Egypt
Experimental Examination Of Enhanced Nanoceramic-Based Self-Cleaning Sprays For High-Efficiency Hydrophobic Photovoltaic Panels, Iman El-Mahallawi, Merna Abdrabo, Ahmed Elkaseer Prof., Engy Elshazly, Mohamed S. El-Deab
Renewable Mechanical Energy
Dust deposition poses a significant challenge in the implementation of photovoltaic panels (PV) especially in hot and dusty environments, such as the Middle East and North Africa (MENA) region. This issue leads to progressive degradation of PV efficiency and output power. In this context, this research work aims to improve PV performance by developing self-cleaning sprays as a preventative solution. Different concentrations of SnO2 and TiO2 nanoceramics were dispersed in isopropyl alcohol solvent to reduce the mixture’s viscosity and facilitate smooth spraying on solar panels, whose efficiency was continually assessed in outdoor conditions. Although less commonly used for this application, …
Mapping Of The Potential To Substitute Plastic In Food Packaging In Finnish Supermarkets,
2024
VTT Technical Research Centre of Finland Ltd.
Mapping Of The Potential To Substitute Plastic In Food Packaging In Finnish Supermarkets, Taina Lahtinen, Kirsi Kataja, Jari Viitanen, Vinay Kumar, Jussi Lahtinen, Ali Harlin
Journal of Applied Packaging Research
Single-use plastics (SUP), which are extensively utilized in food packaging, are one notable cause for the constantly growing littering issue. This novel study is one of the first attempts to systemically analyze food packaging data to reveal the potential for plastic packaging material reduction or substitution by utilizing a primary packaging material summary of single items sold in Finnish supermarkets. The outcome of the study indicates considerable dissimilarities among product groups concerning used packaging materials, weight, share of plastic, and sales volume. The analysis identified sweets and ready-to-eat meals as product groups for which there is a clear need, but …
Performance-Tunable Thermal Barrier Coating For Carbon Fiber-Reinforced Plastic Composites Via Flame Spraying,
2024
Korea Institute of Science and Technology
Performance-Tunable Thermal Barrier Coating For Carbon Fiber-Reinforced Plastic Composites Via Flame Spraying, Heejin Kim, Kandasamy Praveen, Min Wook Lee, Juhyeong Lee
Mechanical and Aerospace Engineering Faculty Publications
Thermal barrier coatings (TBCs) are essential for improving the heat resistance of materials operating in high-temperature environments. This paper proposes a new method for manufacturing double-layered TBC with graded porosity for carbon fiber-reinforced plastic (CFRP) composites. The TBC was created by a flame spraying process, consisting of relatively dense and porous layers: (1) a dense layer was produced by spraying yttria-stabilized zirconia (YSZ) particles directly onto neat carbon fabric substrate and (2) a porous layer was prepared by co-spraying YSZ particles with sacrificial polyetheretherketone (PEEK) particles. The porosity of the porous layer was controlled by varying a PEEK injection distance …
Nanofiber-Hydrogel Composite Scaffold Fabrication Methods For Peripheral Nerve Regeneration,
2024
Rowan University
Nanofiber-Hydrogel Composite Scaffold Fabrication Methods For Peripheral Nerve Regeneration, Jacob Lee Carter
Theses and Dissertations
Nerve graft conduits (NGCs) are a rapidly advancing field for treating peripheral nerve injuries that aim to guide the growth of regenerating axons across damaged gaps. A more effective NGC can be manufactured by combining the use of nanofibers to act as guidewires within a 3-D hydrogel that imitates the extracellular matrix of nerve tissue. Several methods have been developed to embed aligned nanofibers in an ordered architecture within a hydrogel matrix. The first method involves layer-by-layer additive manufacturing to create NGCs with rows of polycaprolactone (PCL) nanofibers surrounded by a gelatin methacrylate (GelMe) hydrogel in a 3-D structure. A …
Luminescent Coupling In Perovskite Tandem Solar Cells: The Advantages Of Perovskite And Luminescent Coupling In Photovoltaics,
2024
University of Minnesota - Morris
Luminescent Coupling In Perovskite Tandem Solar Cells: The Advantages Of Perovskite And Luminescent Coupling In Photovoltaics, Briana Dokken
Senior Seminars and Capstones
Multijunction or tandem solar cells are made of multiple semiconductor light absorbing layers. Having multiple absorber layers in a solar cell allows it to absorb a larger range of the solar spectrum. When electrons recombine (relax to a lower energy state) in the top layer of a tandem solar cell, they can emit luminescent photons that are absorbed by the bottom layer of the cell. This process is called luminescent coupling, and it can be used to enhance the performance of photovoltaic cells. Another strategy to increase solar cell performance is to use perovskite as the absorber layer material. Currently, …
Experimental Study Of Drag Characteristics And Dust Removal Performance Of A Hybrid Wet-Filter Precipitator,
2024
Wright State University
Experimental Study Of Drag Characteristics And Dust Removal Performance Of A Hybrid Wet-Filter Precipitator, Hang Yi, Zifeng Yang, Deqiang Chang, Xinjiao Tian, Jingxian Liu
Mechanical and Materials Engineering Faculty Publications
With their advantages of high dust removal efficiency and low drag characteristics, hybrid wet-filter precipitators have great potential for dust control in coal mines, but the underlying mechanisms are not well understood. In this study, to help fill this knowledge gap, a hybrid wet-filter precipitator consisting of a 40-layer metal filter and a defogger device is designed and a prototype is constructed. Experiments are conducted to investigate its drag characteristics under wind velocities from 0.85 to 5.68 m/s and its dust removal performance under wind velocities of 2 and 4 m/s. On the basis of results with the initial design, …
Investigation Of Temperature, Solution Strength, And Applied Stress Effects On Cation Exchange Processes In Different Geosynthetic Clay Liner Products,
2024
California Polytechnic State University, San Luis Obispo
Investigation Of Temperature, Solution Strength, And Applied Stress Effects On Cation Exchange Processes In Different Geosynthetic Clay Liner Products, Kendra Fuller
Master's Theses
An extensive laboratory test program was conducted to analyze and compare the cation exchange processes in three different varieties of sodium bentonite (Na-B) geosynthetic clay liners (GCLs) over increased conditioning durations up to 32 days and investigate the effects of temperature, solution strength, and applied stress. The goal of this test program was to establish whether the variables of temperature, solution strength, and applied stress improved or degraded the engineering properties of GCLs in laboratory testing and municipal solid waste (MSW) landfill applications. The GCLs were conditioned in liquids of increasing ionic strength, using deionized water and 2, 50, and …
Analysis Of The Thermal Aging Kinetics Of Tallow, Chicken Oil, Lard, And Sheep Oil,
2024
National Tsing Hua University
Analysis Of The Thermal Aging Kinetics Of Tallow, Chicken Oil, Lard, And Sheep Oil, Yun-Chuan Hsieh, Hao Ouyang, Yulin Zhang, Donyau Chiang, Fuqian Yang, Hsin-Lung Chen, Sanboh Lee
Chemical and Materials Engineering Faculty Publications
Understanding the thermal aging kinetics of animal oils is of vital importance in the storage and applications of animal oils. In this work, we use four different techniques, including UV-Vis spectrometry, viscometry, impedance spectroscopy, and acid–base titration, to study the thermal aging kinetics of tallow, chicken oil, lard, and sheep oil in the temperature range from 120 ◦C to 180 ◦C. The evolutions of the UV-Vis absorbance, dynamic viscosity, electric impedance, and acid titration are discussed with the defect kinetics. The evolutions of the color centers, defects for dynamic viscosity, and electric dipoles follow second-order, first-order, and zero-order kinetics, respectively. …
First-Principles Simulation Of The Interaction Between Dna Nucleotides And One-Dimensional Carbon Chain In Electrical Based Sequencing,
2024
University of Arkansas, Fayetteville
First-Principles Simulation Of The Interaction Between Dna Nucleotides And One-Dimensional Carbon Chain In Electrical Based Sequencing, Zeina Salman, Jin-Woo Kim, Steve Tung
Biological and Agricultural Engineering Faculty Publications and Presentations
Electrical DNA sequencing has attracted significant attention in recent years due to its simplified sequencing protocol, compact sequencing system, and relatively low sequencing cost. In the design and fabrication of the sequencing device, carbon-based nanomaterials such as graphene have been explored as a promising sensing material that provides an excellent combination of spatial resolution and base specificity. Using first-principles simulation, we determined the effect on the electrical conductivity of a one-dimensional carbon chain due to the presence of four DNA bases. The simulation results indicate that the interaction between the carbon chain and different DNA bases leads to different levels …
Growth And Faceting Of Tungsten And Oxides In Scandate Cathode Particles During In Situ Heating In The Scanning Electron Microscope,
2024
University of Kentucky
Growth And Faceting Of Tungsten And Oxides In Scandate Cathode Particles During In Situ Heating In The Scanning Electron Microscope, Huanhuan Bai, Thomas John Balk
Chemical and Materials Engineering Faculty Publications
Tungsten-based scandate dispenser cathodes are promising next-generation thermionic electron sources for vacuum electron devices, due to their excellent emission performance at tempera- tures lower than those required for conventional cathodes. There has been a significant recent effort to understand scandate cathode performance and to characterize the tungsten and other materials on the emitting surface, primarily via the study of cathodes before and after emission testing. Moreover, these scandate cathodes have typically been characterized at room temperature only. In situ obser- vations of scandate cathodes is challenging, as these devices are thermionic emitters that operate in a high-vacuum environment, and because …
Effects Of External Pressure On Cycling Performance Of Silicon-Based Lithium-Ion Battery: Modelling And Experimental Validation,
2024
Tongji University
Effects Of External Pressure On Cycling Performance Of Silicon-Based Lithium-Ion Battery: Modelling And Experimental Validation, Kai Zhang, Yinan He, Junwu Zhou, Xinyang Wang, Yong Li, Fuqian Yang
Chemical and Materials Engineering Faculty Publications
Controlling the stress state of electrodes during electrochemical cycling can have a positive effect on the cycling performance of lithium-ion battery. In this work, we study the cycling performance of silicon-based lithium-ion half cells under the action of pressure in a range of 0.1 to 0.4 MPa. The cycling performance of the silicon-based lithium-ion half cells increases first with increasing the pressure to 0.2 MPa and then decreases with further increasing the pressure. The analysis of the surface morphologies of cycled electrodes reveals that applying a pressure of 0.2 MPa leads to the formation of fine electrode surface with the …
