Show/Hide Menu
Hide/Show Apps
Logout
Türkçe
Türkçe
Search
Search
Login
Login
OpenMETU
OpenMETU
About
About
Open Science Policy
Open Science Policy
Open Access Guideline
Open Access Guideline
Postgraduate Thesis Guideline
Postgraduate Thesis Guideline
Communities & Collections
Communities & Collections
Help
Help
Frequently Asked Questions
Frequently Asked Questions
Guides
Guides
Thesis submission
Thesis submission
MS without thesis term project submission
MS without thesis term project submission
Publication submission with DOI
Publication submission with DOI
Publication submission
Publication submission
Supporting Information
Supporting Information
General Information
General Information
Copyright, Embargo and License
Copyright, Embargo and License
Contact us
Contact us
Modeling the effect of key cathode design parameters on the electrochemical performance of a lithium-sulfur battery
Date
2018-06-25
Author
Erisen, Nisa
Emerce, Nur Ber
Erensoy, Sevgi Can
Eroglu, Damla
Metadata
Show full item record
This work is licensed under a
Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License
.
Item Usage Stats
249
views
0
downloads
Cite This
A 1D model is developed for the Li-S cell to predict the effect of critical cathode design parameterscarbon-to-sulfur (C/S) and electrolyte-to-sulfur (E/S) ratios in the cathodeon the electrochemical performance. Cell voltage at 60% depth of discharge corresponding to the lower voltage plateau is used as a metric for calculating the cell performance. The cathode kinetics in the lower voltage plateau is defined with a single electrochemical reaction; thus, the model has a single apparent kinetic model parameter, the cathode exchange current density (i(0,pe)). The model predicts that cell voltage increases considerably with increasing carbon content until a C/S ratio of 1 is attained, whereas the enhancement in the cell voltage at higher ratios is less obvious. The model can capture the effect of the C/S ratio on the cathode kinetics by expressing the electrochemically active area in the cathode in carbon volume fraction; the C/S ratio in the cathode does not affect i(0,pe) in the model. On the other hand, the electrolyte amount has a significant impact on the kinetic model parameter such that increasing electrolyte amount improves the cell voltage as a result of increasing i(0,pe). Therefore, in the model, i(0,pe) needs to be defined as a function of the electrolyte volume fraction, which is known to have a crucial effect on reaction kinetics.
Subject Keywords
Carbon-to-sulfur ratio in the cathode
,
Cathode design
,
Electrochemical modeling
,
Electrolyte-to-sulfur ratio in the cathode
,
Lithium-sulfur battery
URI
https://hdl.handle.net/11511/67741
Journal
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
DOI
https://doi.org/10.1002/er.4045
Collections
Department of Chemical Engineering, Article
Suggestions
OpenMETU
Core
Effect of electrolyte/sulfur ratio in the cathode on the electrochemical performance of Li-S batteries
Emerce, Nur Ber; Külah, Görkem; Eroğlu Pala, Damla; Department of Chemical Engineering (2019)
In this study, the effect of electrolyte to sulfur (E/S) ratio in the cathode, which is an important cell design parameter, on the electrochemical and cell- and system-level performance of a Lithium-Sulfur (Li-S) battery is investigated through modeling efforts. First, a 1-D electrochemical model is developed for an isothermal, constant-current discharge of a Li-S cell to predict the voltage at 60% discharge depth. In the model, cathode exchange current density is defined as a linear function of the electro...
Investigation of effect of design and operating parameters on acoustophoretic particle separation via 3D device-level simulations
Sahin, Mehmet Akif; ÇETİN, BARBAROS; Özer, Mehmet Bülent (Springer Science and Business Media LLC, 2019-12-16)
In the present study, a 3D device-level numerical model is implemented via finite element method to assess the effects of design and operating parameters on the separation performance of a microscale acoustofluidic device. Elastodynamic equations together with electromechanical coupling at the piezoelectric actuators for the stress field within the solid parts, Helmholtz equation for the acoustic field within fluid, and Navier-Stokes equations for the fluid flow are coupled for the simulations. Once the zer...
Modeling and simulation of a navigation system with an IMU and a Magnetometer
Kayasal, Uğur; Özgören, Mustafa Kemal; Department of Mechanical Engineering (2007)
In this thesis, the integration of a MEMS based inertial measurement unit and a three axis solid state magnetometer are studied. It is a fact that unaided inertial navigation systems, especially low cost MEMS based navigation systems have a divergent behavior. Nowadays, many navigation systems use GPS aiding to improve the performance, but GPS may not be applicable in some cases. Also, GPS provides the position and velocity reference whereas the attitude information is extracted through estimation filters. ...
Decomposition of the mean squared error and NSE performance criteria: Implications for improving hydrological modelling
Gupta, Hoshin V.; Kling, Harald; Yılmaz, Koray Kamil; Martinez, Guillermo F. (2009-10-20)
The mean squared error (MSE) and the related normalization, the Nash-Sutcliffe efficiency (NSE), are the two criteria most widely used for calibration and evaluation of hydrological models with observed data. Here, we present a diagnostically interesting decomposition of NSE (and hence MSE), which facilitates analysis of the relative importance of its different components in the context of hydrological modelling, and show how model calibration problems can arise due to interactions among these components. T...
Simulation of inelastic cyclic buckling behavior of steel box sections
Dicleli, Murat (Elsevier BV, 2007-4)
In this study, a nonlinear structural model is developed to simulate the cyclic axial force-deformation behavior of steel braces including their buckling behavior using the commercially available nonlinear finite element based software ADINA. The nonlinear cyclic axial force-deformation simulation is done for braces with box sections. However, the structural model and simulation techniques described in this study may be applicable to braces with various section types using other commercially available struc...
Citation Formats
IEEE
ACM
APA
CHICAGO
MLA
BibTeX
N. Erisen, N. B. Emerce, S. C. Erensoy, and D. Eroglu, “Modeling the effect of key cathode design parameters on the electrochemical performance of a lithium-sulfur battery,”
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
, pp. 2631–2642, 2018, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/67741.