Electrochemical Engineering Models of Electroanalytical Tools for Advanced Batteries

Abstract

Battery design and usage can be optimized through the use of electrochemical engineering models that detail the physicochemical processes occurring in a battery. While lithium-ion battery chemistry and models are well-established, lithium sulfur is still an active area of development and is a promising next-generation chemistry. The first part of this dissertation covers the ongoing challenges of continuum modeling of lithium sulfur, with efforts to accelerate model development using electroanalytical techniques – galvanostatic intermittent titration technique and electrochemical impedance spectroscopy (EIS). We explore the implications on thermo-kinetic parameters by modeling the thermodynamic equilibrium before adding further complexities of kinetics and transport. The second part of this work aims to improve diagnostics, sensing, and control of lithium-ion batteries by modeling a novel technique, dynamic EIS.