Search results for "Lithium Battery"

showing 10 items of 10 documents

Characterization of Sn-Co nanowires grown into alumina template

2009

Nanowires of Sn-Co alloys were grown inside the channels of anodic alumina membrane by potentiostatic deposition. The scanning electron microscope images showed the formation of cylindrical nanowires whose height was increasing with deposition time. The X-ray patterns did not show significant diffraction peaks, suggesting the formation of amorphous phases. The higher content of Co in the nanowires, in comparison to the initial composition of the electrolytic bath, was attributed to a higher rate of Co electrodeposition. These nanowires seem to possess specific features suitable for innovative application in the field of Li-ion batteries due to their dimensional stability and high specific s…

Materials scienceScanning electron microscopeGeneral Chemical EngineeringNanowireNanotechnologyElectrolyteTemplate Electrosynthesis Anodic Alumina Membrane SnCo Alloy Lithium BatteryAmorphous solidAnodeMembraneSettore ING-IND/23 - Chimica Fisica ApplicataChemical engineeringElectrochemistryGeneral Materials ScienceElectrical and Electronic EngineeringPhysical and Theoretical ChemistryVapor–liquid–solid methodDeposition (law)
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Mesoscopic structural organization in fluorinated pyrrolidinium-based room temperature ionic liquids

2019

Abstract In this contribution the microscopic and mesoscopic structural organization in a series of fluorinated room temperature ionic liquids, based on N-methyl-N-alkylpyrrolidinium cations and on bis(perfluoroalkylsulfonyl)imide anions, is investigated, using a synergy of experimental (X-ray and neutron scattering) and computational (Molecular Dynamics) techniques. The proposed ionic liquids are of high interest as electrolyte media for lithium battery applications. Together with information on their good ion transport properties in conjunction with low viscosity, we also describe the existence of nm-scale spatial organization induced by the segregation of fluorous moieties into domains. …

Materials sciencefluorinated02 engineering and technologyElectrolyteNeutron scattering010402 general chemistrymicroscopic01 natural sciencesionic liquidschemistry.chemical_compoundMolecular dynamicsSettore CHIM/02Materials ChemistrymesoscopicPhysics::Chemical PhysicsPhysical and Theoretical ChemistryImideSpectroscopyMesoscopic physicsStructural organizationscatteringionic liquids; fluorinated; microscopic; mesoscopic; scattering; simulation021001 nanoscience & nanotechnologyCondensed Matter PhysicssimulationAtomic and Molecular Physics and OpticsLithium battery0104 chemical sciencesElectronic Optical and Magnetic MaterialschemistryChemical physicsOthersIonic liquidionic liquids structural organization0210 nano-technology
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Processo di produzione di filamenti nanometrici in lega amorfa Sn-Co

2008

Settore ING-IND/23 - Chimica Fisica ApplicataElectrochemical deposition Lithium Battery Anodic alumina membranes Nanowires SnCo alloy
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Lithium ion conducting PVdF-HFP composite gel electrolytes based on N-methoxyethyl-N-methylpyrrolidinium bis(trifluoromethanesulfonyl)-imide ionic li…

2010

Blends of PVDF-HFP and ionic liquids (ILs) are interesting for application as electrolytes in plastic Li batteries. They combine the advantages of the gel polymer electrolytes (GPEs) swollen by conventional organic liquid electrolytes with the nonflammability, and high thermal and electrochemical stability of ILs. In this work we prepare and characterize PVDF-HFP composite membranes swollen with a solution of LiTFSI in ether-functionalized pyrrolidinium-imide (PYRA12O1). The membranes are filled in with two different types of silica: i) mesoporous SiO2 (SBA-15) and a commercial nano-size one (HiSilTM T700). The ionic conductivity and the electrochemical properties of the gel electrolytes ar…

Materials sciencePVdFEnergy Engineering and Power TechnologyIonic bondingchemistry.chemical_elementElectrolyteIonic liquidchemistry.chemical_compoundIonic conductivityThermal stabilityElectrical and Electronic EngineeringPhysical and Theoretical ChemistryGel polymer electrolyteSettore CHIM/02 - Chimica FisicaChromatographyRenewable Energy Sustainability and the EnvironmentPVdF; Ionic liquids; Pyrrolidinium; Gel polymer electrolytes; Lithium battery; Nanoscale fillersLithium batteryLithium batteryMembraneSettore ING-IND/22 - Scienza E Tecnologia Dei MaterialiChemical engineeringchemistryIonic liquidLithiumNanoscale fillerNanoscale fillersPyrrolidinium
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SnCo nanowire array as negative electrode for lithium-ion batteries

2011

Abstract Amorphous SnCo alloy nanowires (NWs) grown inside the channels of polycarbonate membranes by potentiostatic codeposition of the two metals (SnCo- PM ) were tested vs. Li by repeated galvanostatic cycles in ethylene carbonate-dimethylcarbonate – LiPF 6 for use as negative electrode in lithium ion batteries. These SnCo electrodes delivered an almost constant capacity value, near to the theoretical for an atomic ratio Li/Sn of 4.4 over more than 35 lithiation–delithiation cycles at 1 C. SEM images of fresh and cycled electrodes showed that nanowires remain partially intact after repeated lithiation–delithiation cycles; indeed, several wires expanded and became porous. Results of amorp…

Materials scienceTIN-COBALT ALLOYRenewable Energy Sustainability and the EnvironmentMetallurgyNanowireEnergy Engineering and Power Technologychemistry.chemical_elementTin Tin–cobalt alloy Nanowire Anode Lithium-ion batteryLithium batteryLithium-ion batteryAmorphous solidAnodeSettore ING-IND/23 - Chimica Fisica ApplicataChemical engineeringchemistryTINElectrodeLithiumElectrical and Electronic EngineeringPhysical and Theoretical ChemistryTinANODELITHIUM ION BATTERY.NANOWIRE
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A hybrid storage system for wireless sensor nodes powered with energy harvesting

2019

With the recent development of Internet of Things (IoT) and Wireless Sensor Networks (WSN), research and industry have been increasingly focusing on the opportumty of collecting the energy arising from the environment. The Energy Harvesting provides the possibility to supply devices which are placed out of reach or in hazardous spots, e.g. the Wireless Sensor Nodes. Among the different parts belonging to an Energy Harvesting system, the power management network represents a challenging topic. In this paper a Hybrid Energy Storage System (HESS) usable for a WSN powered with Energy Harvesting, based on a battery-capacitor integration, is presented. The experimental results concerning the asse…

Power managementBattery (electricity)Lithium Batterybusiness.industryComputer science020209 energy020208 electrical & electronic engineeringElectrical engineering02 engineering and technologySettore ING-IND/32 - Convertitori Macchine E Azionamenti ElettriciUSableSettore ING-INF/01 - Elettronicalaw.inventionCapacitorlawComputer data storageEnergy Harvesting0202 electrical engineering electronic engineering information engineeringWirelessBuck-Boost ConverterWireless Sensor NetworksbusinessWireless sensor networkEnergy harvestingbuck-boost converter; energy harvesting; lithium battery; wireless sensor networks
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Description of Hysteresis in Lithium Battery by Classical Preisach Model

2012

In this paper Preisach Model is applied to obtain a mathematical model of the hysteresis in lithium battery. Preisach Model allows to describe the hysteresis of charging and discharging cycles in a lithium battery. The identification of the model is obtained by using a neural network technique developed for magnetic systems. The model is verified on some experimental tests on commercial batteries.

HysteresisSettore ING-IND/11 - Fisica Tecnica AmbientaleMaterials scienceArtificial neural networkGeneral EngineeringControl engineeringLithium batteryELECTRICAL ENERGY PREISACH MODELElectrical energy storageAdvanced Materials Research
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The Jiles Atherton Model for Description Of Hysteresis in Lithium Battery

2013

In this paper Jiles Atherton (JA) Model is used to obtain a mathematical model of the hysteresis in lithium battery. JA Model allows to describe both the hysteresis and the dynamical features of charging and discharging cycles in a lithium battery. The identification of the model is obtained by using a neural network technique developed for magnetic systems. The model is validated on some experimental tests on commercial batteries.

EngineeringHysteresisSettore ING-IND/11 - Fisica Tecnica AmbientaleArtificial neural networkENERGY STORAGE BATTERYHardware_GENERALbusiness.industryControl theoryJiles-Atherton modelControl engineeringSettore ING-IND/32 - Convertitori Macchine E Azionamenti ElettricibusinessLithium battery
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Performance of Thin-Film Lithium Energy Cells under Uniaxial Pressure

2008

The objective of this study was two-fold. The first objective was to determine if the all-solid-state thin-film lithium energy cells could withstand the minimal 550 kPa uniaxial pressure required for composite manufacturing, which both specimens successfully did. The second objective was to determine the upper boundary uniaxial pressure limit of operation for the all-solid-state thin-film lithium energy cells. The two all-solid- state thin-film lithium energy cells tested in the present study under uniaxial pressure performed well even when subjected to uniaxial pressures up to about 2.0 MPa. However, pressures higher than this value led to their degradation. The observed degradation was du…

Microelectromechanical systemsFabricationMaterials sciencechemistry.chemical_elementCondensed Matter PhysicsUniaxial pressureSurface pressureLithium batterythin film batteries mechanical performanceSettore ING-IND/22 - Scienza E Tecnologia Dei MaterialichemistryGeneral Materials ScienceLithiumThin filmComposite materialEnergy (signal processing)Advanced Engineering Materials
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Flash microwave synthesis of trevorite nanoparticles.

2008

Nickel ferrite nanoparticles have several possible applications as cathode materials for rechargeable batteries, named 'lithium-ion' batteries. In this study, NiFe{sub 2}O{sub 4} was prepared by microwave induced thermohydrolysis. The obtained nanoparticles were characterized by scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDX), X-ray diffraction (XRD), BET method, transmission electron microscopy (TEM) and small angle X-ray scattering (SAXS). All the results show that the microwave one-step flash synthesis leads in a very short time to NiFe{sub 2}O{sub 4} nanoparticles with elementary particles size close to 4-5 nm, and high specific surfaces (close to 240 m…

Materials scienceNanostructureScanning electron microscopeXRDAnalytical chemistryNanoparticle02 engineering and technology010402 general chemistry01 natural sciences7. Clean energyNanomaterialsInorganic ChemistryMaterials ChemistryIron oxideFerritesPhysical and Theoretical ChemistryNickel oxideX-ray spectroscopySmall angle X ray scatteringParticle sizeDispersive spectrometryLithium batteryNanostructured materials021001 nanoscience & nanotechnologyCondensed Matter Physics0104 chemical sciencesElectronic Optical and Magnetic MaterialsElectrode materialMicrowave heatingOrganic conductorsX-ray crystallographyCeramics and CompositesFerrite (magnet)NanoparticlesNiFe2O40210 nano-technologyScanning electron microscopyMicrowaveTransmission electron microscopyNanomaterial synthesis
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