Doctoral Dissertations

Keywords and Phrases

Alternative Energy; Green Energy; Li-Ion Batteries; Optimal Charging; Remanufacturing; Total Life Cycle Analysis

Abstract

As demand for Lithium-Ion Batteries (LIBs) have skyrocketed over the past decade, the need for better charging methodologies and recycling methods have become vitally important. At a fundamental level, this dissertation strives to fulfill the green promise of a future without fossil fuels. In order to promote a transition away from fossil fuels, LIBs for vehicles require ultrafast charging times equivalent to a normal vehicle (6 mins). However, this process leads to high volume expansion for next generation electrode materials which causes degradation. Without limiting this factor, the environmental impact shifts from oil rigs to Li mines and landfills. The first paper shows a novel optimal charging protocol focusing on the relationship between concentration gradients and degradation, and state-of-charge-dependent diffusivity. The paper demonstrates a constant gradient constant voltage charging approach (CGCV) that controls this gradient in combination with diffusivity can create novel charging current profiles that maintain sufficiently low maximum stress. The second paper presents a facile direct recycling remanufacturing process that does not rely on elevated temperatures or harsh chemicals to recover pristine metals (Li, Ni, Co, etc.) from spent electrodes. This paper introduces a more minimally invasive approach. A detailed investigation of treatment steps including plasma treatment, drying methodology, pressing, type of slurry addition, has enabled the development of an optimized process achieving high cell viability (>80%) and capacity performance for highly degraded electrodes.

Advisor(s)

Park, Jonghyun

Committee Member(s)

Okafor, A. Chukwujekwu (Anthony Chukwujekwu)
Lou, Frank W.
Kimball, Jonathan W.
Bristow, Douglas A.

Department(s)

Mechanical and Aerospace Engineering

Degree Name

Ph. D. in Mechanical Engineering

Publisher

Missouri University of Science and Technology

Publication Date

Summer 2024

Pagination

xii, 105 pages

Note about bibliography

Includes_bibliographical_references_(pages 42, 93 and 99-101)

Rights

©2024 Kasim Adesegun Adewuyi , All Rights Reserved

Document Type

Dissertation - Open Access

File Type

text

Language

English

Thesis Number

T 12437

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