Location

Innovation Lab Atrium

Start Date

4-3-2025 2:00 PM

End Date

4-3-2025 3:30 PM

Presentation Date

3 April 2025, 2:00pm - 3:30pm

Biography

Kiernan O'Boyle is a Ph.D. student in the Mechanical Engineering department, advised by Dr. Jonghyun Park. Their research focuses on advanced materials and manufacturing for energy storage and biomedical applications. Kiernan's work includes investigating extreme fast charging of lithium-ion batteries by controlling lithium plating, electrochemical exfoliation of hard carbon derived from soybeans, high-entropy solid-state electrolyte polymers, and the controllable wettability of nanofibers with zinc oxide nanoparticles for biomedical use. Through these projects, they aim to improve battery performance, enhance manufacturing techniques, and develop functional materials for both energy storage and healthcare applications.

Meeting Name

2025 - Miners Solving for Tomorrow Research Conference

Department(s)

Mechanical and Aerospace Engineering

Comments

Advisor: Jonghyun Park

Abstract:

The inability to fast charge electrical vehicles (EVs) in a time analogous to refilling an internal combustion engine (ICE) vehicle remains a considerable obstacle. Despite successful innovations in battery materials and design, EV charging still lacks advanced algorithms. Fast charging causes serious degradation, including lithium plating and SEI layer growth. To mitigate degradation while concurrently achieving a fast charging time, the CQtCV algorithm was developed. The ‘CQt’ refers to the constant (C) of the capacity (Q) reduction rate (t) due to plating, regulating lithium plating below a critical threshold before switching to constant voltage (CV) to enable extreme fast charging with minimal degradation. Notably, CQtCV achieved an average charging time of 7.2 minutes to reach 80% capacity, representing an 85% reduction compared to CCCV while maintaining the same degradation rate. For the same charging time, CQtCV showed a 73.93% increase in nominal capacity over 100 cycles compared to CCCV.

Document Type

Poster

Document Version

Final Version

File Type

event

Language(s)

English

Rights

© 2025 The Authors, All rights reserved

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Apr 3rd, 2:00 PM Apr 3rd, 3:30 PM

Extreme fast charging algorithm for lithium-ion batteries with precision lithium plating regulation for degradation reduction

Innovation Lab Atrium