PhD Defense by Dong-Chan Lee

Event Details
  • Date/Time:
    • Thursday March 22, 2018
      2:00 pm - 4:00 pm
  • Location: MRDC 3404
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Summaries

Summary Sentence: Iron Anodes for Rechargeable Alkaline Batteries

Full Summary: No summary paragraph submitted.

THE SCHOOL OF MATERIALS SCIENCE AND ENGINEERING

 

GEORGIA INSTITUTE OF TECHNOLOGY

 

Under the provisions of the regulations for the degree

DOCTOR OF PHILOSOPHY

on Thursday, March 22, 2018

2:00 PM
in MRDC 3404

 

will be held the

 

DISSERTATION DEFENSE

for

 

Dong-Chan Lee

 

"Iron Anodes for Rechargeable Alkaline Batteries"

 

Committee Members:

 

Prof. Gleb Yushin, Advisor, MSE

Prof. Faisal Alamgir, Co-advisor, MSE

Prof. Meilin Liu, MSE

Prof. Thomas Fuller, ChBE

Prof. Seung Woo Lee, ME

 

Abstract:

 

Rechargeable low-cost alkaline batteries may become attractive non-flammable alternatives to lithium-ion (Li-ion) batteries for applications where achieving the highest energy density is less critical than safety, environmental friendliness and low cost of energy storage. The broad abundance and extremely low price of iron (Fe) make it particularly attractive as rechargeable anode material for aqueous batteries. By conducting systematic studies on Fe anodes using cyclic voltammetry and a broad range of state of the art characterization tools, four distinct stages of Fe anode evolution were revealed: development, retention, fading and failure, where each stage is associated with very specific changes in the morphology and phase of Fe anodes. The particle fragmentation with the consequent gain in the surface area resulted in the increase in the Fe anode capacity during the initial cycles of deep charge/discharge. Most importantly, it was discovered that the irreversible formation of monocrystalline maghemite (γ-Fe2O3) with low reactivity is responsible for the eventual Fe anode capacity fading. Along with the base study on Fe anodes in alkaline conditions, the extended research observed how the individual factor in cell operation influences the electrochemical behavior, morphology evolution and phase transition of electrodes. A variety of components was independently adjusted: potential range, electrolyte concentration, scan rate, and additive content. The author hopes that this study will be a cornerstone for both the fundamental understanding of Fe anodes in alkaline conditions and the future development of low-cost rechargeable alkaline batteries for grid energy storage.

 

Additional Information

In Campus Calendar
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Graduate Education and Faculty Development

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Faculty/Staff, Public, Graduate students, Undergraduate students
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Keywords
Phd Defense
Status
  • Created By: Tatianna Richardson
  • Workflow Status: Published
  • Created On: Mar 12, 2018 - 11:10am
  • Last Updated: Mar 12, 2018 - 11:10am