Robust optimization techniques and design of Li-ion batteries
Latinwo, Folarin B.
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https://hdl.handle.net/2142/24036
Description
Title
Robust optimization techniques and design of Li-ion batteries
Author(s)
Latinwo, Folarin B.
Issue Date
2011-05-25T15:04:21Z
Director of Research (if dissertation) or Advisor (if thesis)
Braatz, Richard D.
Department of Study
Chemical & Biomolecular Engr
Discipline
Chemical Engineering
Degree Granting Institution
University of Illinois at Urbana-Champaign
Degree Name
M.S.
Degree Level
Thesis
Keyword(s)
Robust Optimization
lithium-ion (Li-ion) batteries
Batch Crystallization
Polynomial Chaos Expansion
Abstract
This thesis applies robust optimization techniques to the design of Lithium-ion batteries with spatially varying porosities. The microstructure of a porous electrode was designed to minimize the Ohmic resistance. The spatial variation in the porosities was found to provide enhanced robustness of the Li-ion battery to uncertainties. This thesis also proposes a robust optimization formulation based on polynomial chaos expansion that is applied in the design of the Li-ion battery and a batch crystallization process. The proposed approach yields an analytic expression for the computation of the variance in the optimization objective that is cheap to evaluate computationally. The estimates of the variance incorporated into the multiobjective optimization were found to be accurate enough for the purposes of robust optimal design.
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