PDF Publication Title:
Text from PDF Page: 068
4 Modeling the lithium-sulfur battery – theory and methods 4.1 Background Modeling has become an established, if not essential part of the toolset of electrochem- ical analysis methods. Not only can it save considerable cost and time in the research and development of batteries, but also it enables a more profound understanding than possible by mere experimentation. Therefore, modeling has penetrated all aspects of battery development and design, ranging from system layout to atomistic reaction kinetics [178], see also Fig. 4.1. Small-scale models typically perform ab initio calcu- lations, which make use of quantum mechanics and fundamental physical constants to determine parameters of materials and reactions without experimental input [179]. Despite some simplifying assumptions, this approach is computationally very inten- sive and thus limited by the size of the system (typically to a few dozen atoms). It needs to be complimented by other techniques, e.g. Monte-Carlo simulations, in order to bridge the gap to electrochemical applications [180, 181]. Large scale, system level simulations on the other hand mostly use an equivalent circuit [91] or black box rep- resentation of the battery, which is described by an entirely empirical set of equations, see e.g. Ref. [182]. This approach is computationally inexpensive to the point where the algorithms can be implemented in real-time, embedded battery management sys- tems [183–185]. With regard to the electrochemistry, however, the insight which can be gained by using such a model is very limited as is its extent of validity [186, 187]. An overview of the different types of models can be found in Ref. [188]. For this work, an intermediate level is chosen both in terms of scale and computational complexity: A physically-based continuum approach is taken to model the membrane-electrode assembly (MEA) of the cell in detail. The system is determined by a set of differential algebraic equations describing physical processes such as reaction kinetics, transport, or the evolution of phases on a length scale larger than individual structural details of the electrodes, which is why this type of model is often referred to as continuum model. 68PDF Image | Lithium-Sulfur Battery: Design, Characterization, and Physically-based Modeling
PDF Search Title:
Lithium-Sulfur Battery: Design, Characterization, and Physically-based ModelingOriginal File Name Searched:
Dissertation_David_N._Fronczek_The_Lithium_Sulfur_Battery.pdfDIY PDF Search: Google It | Yahoo | Bing
Sulfur Deposition on Carbon Nanofibers using Supercritical CO2 Sulfur Deposition on Carbon Nanofibers using Supercritical CO2. Gamma sulfur also known as mother of pearl sulfur and nacreous sulfur... More Info
CO2 Organic Rankine Cycle Experimenter Platform The supercritical CO2 phase change system is both a heat pump and organic rankine cycle which can be used for those purposes and as a supercritical extractor for advanced subcritical and supercritical extraction technology. Uses include producing nanoparticles, precious metal CO2 extraction, lithium battery recycling, and other applications... More Info
CONTACT TEL: 608-238-6001 Email: greg@infinityturbine.com (Standard Web Page)