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Simulation and modeling of electrochemical systems with pore-scale analysis
Dissertation   Open access

Simulation and modeling of electrochemical systems with pore-scale analysis

Charles P. Andersen
Doctor of Philosophy (Ph.D.), Drexel University
Feb 2019
DOI:
https://doi.org/10.17918/hexn-t660
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Abstract

Lithium ion batteries Vanadium oxide Electrochemical Analysis Mechanical Engineering
One of the most important requirements for being able to integrate clean energy generation is storage through new battery technology. For example, to address the issue from intermittent energy sources such as wind and solar power vanadium redox flow batteries (VRFBs) have emerged as promising technology. Another promising technology, particularly for vehicular application, is that of lithium air batteries which boast high energy density (an order of magnitude higher than state of the art Li-ion batteries) but suffer from short cycle life. While the majority of literature covers these energy storage systems in experimental setups experimental identification for the optimal electrode microstructure is challenging, time consuming, and expensive. The primary objective of this dissertation is to apply pore-scale modeling to simulate the effect of key design parameters and operating conditions to optimize cell performance in vanadium redox flow and lithium-air batteries. The motivation behind selecting these battery systems is not only the technological advantages highlighted above but also because they span very different electrode architecture length scales (nanometers for Li-air to millimeters for flow batteries), which will enable the models developed to be utilized in many different systems beyond the specific ones studied here.

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