Design of Polymer Blend Electrolytes through a Machine Learning ApproachClick to copy article linkArticle link copied!
- Bill K. WheatleBill K. WheatleMcKetta Department of Chemical Engineering, The University of Texas at Austin, Austin 78712, Texas, United StatesMore by Bill K. Wheatle
- Erick F. FuentesErick F. FuentesMcKetta Department of Chemical Engineering, The University of Texas at Austin, Austin 78712, Texas, United StatesMore by Erick F. Fuentes
- Nathaniel A. LyndNathaniel A. LyndMcKetta Department of Chemical Engineering, The University of Texas at Austin, Austin 78712, Texas, United StatesMore by Nathaniel A. Lynd
- Venkat Ganesan*Venkat Ganesan*Email: [email protected]McKetta Department of Chemical Engineering, The University of Texas at Austin, Austin 78712, Texas, United StatesMore by Venkat Ganesan
Abstract

We apply a machine learning (ML) technique to the multiobjective design of polymer blend electrolytes. In particular, we are interested in maximizing electrolyte performance measured by a combination of ionic transport (measured by ionic conductivity) and electrolyte mechanical properties (measured by viscosity) in a coarse-grained molecular dynamics framework. Recognizing the expense of evaluating each of these properties, we identify that the anionic mean-squared displacement and polymer relaxation time can serve as their proxies. By employing the ML approach known as Bayesian optimization, we identify a trade-off between ion transport and electrolyte mechanical properties as a function of varied design parameters, which include host molecular weight and polarity. Our results suggest that blend electrolytes whose hosts have unequal molecular weights, such as gel polymer electrolytes, rarely maximize electrolyte performance. Overall, our results suggest the potential of a framework to design high-performance electrolytes using a combination of molecular simulation and ML.
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