Unit cells for multiphysics modelling of structural battery composites

To predict the multifunctional performance of structural battery composites, multiple physical phenomena need to be studied simultaneously. Hence, multiphysics models are needed to evaluate the complete performance of this composite material. In this study the coupled analysis for multiphysics modelling of structural battery composites is presented and modelling strategies and unit cell designs are discussed with respect to the different physical models. Furthermore, FE-models are setup in the commercial Finite Element (FE) software COMSOL to study if existing physics-based modelling techniques and homogenization schemes for conventional lithium ion batteries can be used to describe the electrochemical behaviour of structural battery composites. To predict the microscopic behaviour, the local variation of the mass and charge concentrations need to be accounted for. Hence, refined models with appropriate boundary conditions are needed to capture the microscopic conditions inside the material. The numerical results demonstrate that conventional physics-based 1D battery models and homogenization schemes based on porous media theory can be used to predict the macroscopic electrical behaviour of the fibrous structural battery. For future work electrochemical experiments on battery cell level are planned to validate the numerical results

Hydrodynamic acoustic plasmon resonances in semiconductor nanowires and their dimers

The hydrodynamic Drude model known from metal plasmonics also applies to semiconductor structures of sizes in between single-particle quantum confinement and bulk. But contrary to metals, for semiconductors two or more types of plasma may have to be taken into account in order to properly describe their plasmonic properties. In this combined analytical and computational study, we explore predictions of the recently proposed two-fluid hydrodynamic Drude model for the optical properties of plasmonic semiconductor nanowires, in particular for thermally excited InSb nanowires. We focus on the low-frequency acoustic surface and bulk plasmon resonances that are unique fingerprints for this model and are yet to be observed. We identify these resonances in spectra for single nanowires based on analytical calculations, and they are in complete agreement with our numerical implementation of the model. For dimers of nanowires we predict substantial increase of the extinction cross section and field enhancement of the acoustic localized surface plasmon resonance, which makes its observation in dimers more likely.Comment: I would like to inform that Dr.Abbas Zarifi is the corresponding author of this pape

Modeling the effect of rib and channel dimensions on the performance of high temperature fuel cells-parallel configuration

This work investigates the effect of rib width, channel width and channel depth on the performance of a high temperature proton exchange membrane (HT-PEM) fuel cell with parallel flow field configuration. Simulation results indicate that the rib width has the maximum impact on the performance of the fuel cell. The lower the rib width, the better is performance of HT-PEM fuel cell. Changing the channel width seems to have a moderate effect, while changing the channel depth seems to have very limited impact on the fuel cell performance. The effect of various rib width and channel dimensions on the pressure drop across the channel is also studied. The concentration profile of the oxygen across the cathode gas channel is modeled as a function of the channel width and depth. Modeling results are found to be in well agreement with experimental data

Thermoplasmonic of Single Au@SiO2 and SiO2@Au Core Shell Nanoparticles in Deionized Water and Poly-vinylpyrrolidoneMatrix

Metal nanoparticles can serve as an efficient nano-heat source with confinement photothermal effects. Thermo-plasmonic technology allows researchers to control the temperature at a nanoscale due to the possibility of precise light propagation. The response of opto-thermal generation of single gold-silica core-shell nanoparticle immersed in water and Poly-vinylpyrrolidone surrounding media is theoretically investigated. Two lasers (CW and fs pulses) at the plasmonic resonance (532 nm) are utilized. For this purpose, finite element method is used via COMSOL multiphysics to find a numerical computation of absorption cross section for the proposed core –shell NP in different media. Thermo-plasmonic response for both lasers is studied. The heat profile of different nanostructures is estimated. The results revealed that the temperature distribution profile was varied due to changing in the relative volume fraction between the core and the shell of nanoparticle

Modelling the effect of anode particle radius and anode reaction rate constant on capacity fading of Li-ion batteries

This paper investigates the effect of anode particle radius and anode reaction rate constant on the capacity fading of lithium-ion batteries. It is observed through simulation results that capacity fade will be lower when the anode particle size is smaller. Simulation results also show that when reaction rate constant is highest, the capacity loss is the lowest of lithium-ion battery. The potential drop across the SEI layer (solid electrolyte interphase) is studied as a function of the anode particle radius and anode reaction rate constant. Modelling results are compared with experimental data and found to compare well

PEMODELAN SOLAR WINDOW SEMITRANSPARENT PHOTOVOLATAIC PANELS UNTUK MENGHASILKAN POTENSI ENERGI LISTRIK (Studi Kasus: Pekanbaru, Riau)

PEMODELAN SOLAR WINDOW SEMITRANSPARENT PHOTOVOLATAIC PANELS UNTUK MENGHASILKAN POTENSI ENERGI LISTRIK (Studi Kasus: Pekanbaru Riau) ABDUL HAFIZ SYAM 11455105031 Program Studi Teknik Elektro Fakultas Sains Dan Teknologi Universitas Islam Negeri Sultan Syarif Kasim Riau Jl. Soebrantas No. 155 Pekanbaru ABSTRAK Kota Pekanbaru merupakan kota dengan konsumsi energi yang selalu meningkat sebesar 9.8% disetiap tahunnya Untuk Memenuhi beban kosumsi energi listrik, maka pada penelitian ini menawarkan pembangkit listrik tenaga surya yang terintegrasi dengan kaca bangunan atau Solar Windows Panels. Tujuan dari penelitian ini adalah memodelkan Solar Window Semitransparent Photovoltaic Panels dan menghasilkan potensi energi listrik di kota Pekanbaru. Metode pada penelitian ini menggunakan pemodelan simulasi dengan menggunakan software comsol 5.3a dengan Finite Element Method (FEM). Skenario pemodelan menggunakan perubahan parameter ketebalan kaca yaitu 4mm, 5mm dan 6mm. Mendapatkan hasil temperatur terbaik sebesar 302.12 K pada ketebalan kaca 4mm diorientasi utara. Efisiensi sel PV terbaik sebesar 7.7932% pada ketabalan kaca 4mm diorientasi Utara. Losses efisiensi terbaik sebesar 0.9864% pada ketebalan kaca 4mm diorientasi utara. Energi listrik sebesar 0.26647 kWh pada ketebalan kaca 5mm diorientasi barat. Penggunan sel PV yang terintegrasi pada kaca bangunan atau Solar Window Panels dapat menghasilkan potensi energi listrik terbaik pada ketebalan kaca 4mm. Kata Kunci : Listrik, model simulasi, Comsol Multiphysic