Dr. Vitaliy YurkivUniversity of Illinois at Chicago
Energy is an essential part of our lives, for a variety of reasons, and it can be found in different forms, however, energy is often present in a state, which cannot be directly used for targeted applications. Thus, it requires a suitable conversion process to transform it from one state to the more useful state. Furthermore, energy may be available in such low amounts or in places that it is not economically feasible to invest into its retrieval. For that reason, research of various methods to store and transport energy from place to place is of great importance. Thus, this combined energy conversion and storage strategy offers the unique opportunity to develop best performing energy management technologies that is indispensable for future human activity. It is this opportunity that forms the basis for my principle research interest, that seeks to discover how the understanding of fundamental (mechanical, electrochemical and transport) processes may help to improve higher hierarchy systems. In particular, my primary research interests are focused on the modeling and simulation of electrochemical energy storage (secondary battery type) and conversion (fuel/electrolysis cells) technologies. In this talk, I will describe multi-scale and multi-physics modeling of secondary (rechargeable) battery alongside with the fuel/electrolysis cells and the proper coupling between scales and methods.
In order to properly describe the performance of secondary batteries and fuel cells, variety of processes at different scales must be taken into account. Among them: (i) mechanical processes, which include elasto-plastic deformation of electrodes (e.g., ions intercalation into the electrodes); (ii) electrochemical processes that comprise of interfacial charge-transfer; (iii) transport processes including, gas-phase transport (e.g., in the supply channels, porous support), liquid and solid transport (e.g., liquid/solid electrolytes, etc.). For example, during the battery operation ions (de)intercalation from/to electrode occurs. This global process consists of ions migration through the electrolyte, charge transfer at the interface between the electrolyte and electrode and solid species transport through the electrode. Another example is chemical species conversion during fuel cells operation, where a complex heterogeneous and homogeneous reforming chemistry takes place, which consists of up to 20 surface/gas chemical reactions and several electrochemical reactions. Since, different components of fuel cell have porous structure, the effect of gas transport throughout the pore space (Stefan-Maxwell flow, Darcy viscous flow) coupled to chemistry must be considered. Furthermore, since, the charge-transfer occur at the triple or double phase boundary, it creates a significant stress between phases leading to the phases’ delamination. In order to properly describe all these processes multi-scale approach based upon multi-physics techniques should be employed. Often it is not possible to combine all those techniques in a single modeling methodology, thus decoupled approach should be used. Example applications of this methodology will be outlined in my talk. The proper strategies of methods coupling and their usage towards the fundamental processes investigation and the improvement of battery and fuel cell performance will be further elaborated.
Dr. Vitaliy Yurkiv is presently working as a visiting senior research specialist at the Department of Mechanical and Industrial Engineering, University of Illinois at Chicago. Dr. Yurkiv has received his PhD (12/2010) at the Interdisciplinary Centre for Scientific Computing (IWR) from Heidelberg University (Heidelberg, Germany) focusing on the modeling and simulation of energy storage and conversion technologies. After obtaining his PhD degree, he was working (01/2011 – 11/2015) as a research associate with further advancement to principal investigator at the Institute of Engineering Thermodynamics, German Aerospace Center (Stuttgart, Germany). He has received his M.S. and B.S. degrees from Ivan Franko National University of Lviv (Lviv, Ukriane) in July, 2006. His primary research interest is multidisciplinary modeling and simulation of fundamental processes as occur in energy storage (batteries) and conversion (fuel/electrolysis cells) devices. He has been working on numerous research projects (ten in total) in industry (Toyota Motor Corporation, Honda Motor Company, Ltd., Daimler AG, Robert Bosch GmbH), academic (NSF, DFG, Seventh Framework Programme) and government (DLR). He has five years of university level teaching experience related to energy storage and conversion technologies. He has published 19 peer-reviewed articles (12 as a first author) and numerous single-reviewed conference proceedings papers.
Host: Dr. Reza Shahbazian-Yassar
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