Committee Members (Professors) note that the exam will be Nov. 30 at 1:30 p.m., in ARMS 2119. Seminar is Nov. 28, at 1:30 p.m., in ARMS 1109 Please consider attending the following: MATERIALS ENGINEERING SEMINAR “Microstructural Models for Porous Rechargeable Lithium-Ion Batteries” By Juan Alfonso Campos Purdue MSE Ph.D. Preliminary Exam Advisor: Professor R. Edwin García ABSTRACT A porous electrode was regarded as a solution to the rampant requirements of energy and power densities coming from the high technology electronic devices. However, the underlying composite character made it a complicated system to model. In nature, it is an electrochemical system of known reactions, but requires to be modeled as a multiphase, multicomponent system, where kinetic reactions take place between atomic and microscopic length scales; although, the design parameters and desired effects are macroscopic. A review of pros, cons, limitations and scope of the state of the art models was provided. Volume averaging models revealed an existent successful implementation of phase transitions, a methodology to determine 1-D model validity, and effects of tortuosity estimation in model fidelity. Microstructurally resolved models, shown the consequences of particle to particle interactions, particle morphology effects, and the computational burden difference in favor of averaging models for pragmatic design. Consequently, it was proposed a rigorously homogenized macroscale model enhanced with microstructural effects, and based on preliminary results, a non-heuristic method to decide applicability of existing models when electrode microstructure is known. Date: Tuesday, November 28, 2017 Time: 1:30 P.M. Place: ARMS 1109