PhD Proposal by Ah-Young Song

Event Details
  • Date/Time:
    • Monday September 17, 2018
      2:00 pm - 4:00 pm
  • Location: Love 109
  • Phone:
  • URL:
  • Email:
  • Fee(s):
    N/A
  • Extras:
Contact
No contact information submitted.
Summaries

Summary Sentence: Development of the high Lithium-ion crystalline Solid Electrolytes and understanding the ion dynamics

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 Monday, September 17, 2018

2:00 PM
in Love 109

 

will be held the

 

DISSERTATION PROPOSAL DEFENSE

for

 

Ah-Young Song

 

"Development of the high Lithium-ion crystalline Solid Electrolytes and understanding the ion dynamics"

 

Committee Members:

 

Dr. Gleb Yushin, Advisor, MSE

Dr. Angus Wilkinson, ChBE

Dr. Johannes Leisen, ChBE

Dr. Josh Kacher, MSE

Dr. Matthew McDowell, MSE

 

Abstract:

 

Li-rich antiperovskite studies were conducted to take into account the industrial needs of solid electrolytes in terms of lightweight, low-cost, low-processing temperature. Controversies surrounding previously reported studies motivated us to synthesize Li2+xOH1-x Hal (Hal = Cl and Br) with contaminant-free, ultra-fast, and well-controlled process. We carefully identified the compositions of the synthesized Li2+xOH1-xCl (0≤x<1) and Li2OHBr solid electrolytes and crystal structures at different temperatures. Our studies revealed the presence of proton in the prepared solid electrolytes compared to Li3OHal reported in previous studies. To characterize the materials, EDS, TOF-SIMS, NMR, XPS and XRD have been performed. The fraction of H, which is analyzed in the solid electrolytes, effects on Li ion conductivity inevitably. In contrast to the existing belief that the presence of H impedes Li ion hopping, we found that H should be involved in Li+ conduction mechanism. Since the Li ion conduction mechanism has not been investigated, fundamental understanding about Li ion dynamics will be performed with various approaches theoretically and experimentally.

Additional Information

In Campus Calendar
No
Groups

Graduate Studies

Invited Audience
Faculty/Staff, Public, Graduate students, Undergraduate students
Categories
Other/Miscellaneous
Keywords
Phd Defense
Status
  • Created By: Tatianna Richardson
  • Workflow Status: Published
  • Created On: Sep 4, 2018 - 11:01am
  • Last Updated: Sep 4, 2018 - 11:01am