Younggyu Kim

Hello! I'm Younggyu Kim.
I study Energy materials!

RESEARCH EXPERIENCE

University of Michigan

Postdoctoral Research Fellow

2022 – Present • Ann Arbor, MI

  • Developed All-Solid-State Li-ion Batteries with novel solid electrolytes (sulfides, halides)

  • Fabricated thin (tens of μm) free-standing solid electrolytes with multi-layered structures using scalable methods

  • Analyzed 2D datasets with mathematical and statistical techniques to evaluate inhomogeneity in electrochemical systems

Massachusetts Institute of Technology

Graduate Research Assistant

2017 – 2022 • Cambridge, MA

  • Studied degradation mechanisms at buried interfaces within All-Solid-State Li-ion Batteries
    (cell fabrication & cell operation)

  • Performed in-operando chemical characterization of cathode|solid electrolyte interface with X-ray Absorption Spectroscopy (XAS)

  • Improved stability at the cathode|solid electrolyte interface in All-Solid-State Li-ion Batteries based on the understanding of degradation mechanisms

EDUCATION

Massachusetts Institute of Technology

Ph.D. in Materials Science and Engineering

Cambridge, MA
2022

Seoul National University

B.S. in Materials Science and Engineering

Seoul, Republic of Korea
2017

PUBLICATIONS

Controlling Stack Pressure Inhomogeneity in Anode-free Solid-State Batteries using Elastomeric Interlayers
M. A. Thorpe,‡ M. Zhang,‡ D. W. Liao, S. E. Sandoval, Y. Kim, P. Shevchenko, M. T. McDowell, and M. D. Thouless & N. P. Dasgupta
Accepted at Matter 2025

Eliminating chemo-mechanical degradation of lithium solid-state battery cathodes during >4.5V cycling using amorphous Nb2O5 coatings
M. K. Jangid,‡ T. H. Cho,‡ T. Ma, D. W. Liao, H. Kim, Y. Kim, M. Chi, and N. P. Dasgupta
Nature Communications 2024, 15, 10233
https://doi.org/10.1038/s41467-024-54331-w

Electro-Chemo-Mechanical Evolution at the Garnet Solid Electrolyte–Cathode Interface
Y. Kim, S. Chandra, I. Waluyo, A. Hunt, and B. Yildiz
ACS Applied Materials & Interfaces 2024, 16 (32), 42034–42048
https://doi.org/10.1021/acsami.4c04713

Thin Free-Standing Sulfide/Halide Bilayer Electrolytes for Solid-State Batteries Using Slurry Processing and Lamination
Y. Kim, C. Juarez-Yescas, D. W. Liao, M. K. Jangid, P. Joshi, H. Yang, and B. Zahiri & P. V. Braun & N. P. Dasgupta
ACS Energy Letters 2024, 9 (4), 1353–1360
https://doi.org/10.1021/acsenergylett.4c00092

Avoiding CO2 improves thermal stability at the interface of Li7La3Zr2O12 Electrolyte with Layered Oxide Cathodes
Y. Kim, I. Waluyo, A. Hunt, and B. Yildiz
Advanced Energy Materials 2022, 12 (13), 2102741
https://doi.org/10.1002/aenm.202102741

Thermally-driven reactivity of Li0.35La0.55TiO3 Solid Electrolyte with LiCoO2 Cathode
S. Chandra,‡ Y. Kim,‡ D. Vivona, I. Waluyo, A. Hunt, B. Schluester, J. B. Lee, Y. Shao-Horn, and B. Yildiz
Journal of Materials Chemistry A 2022, 10, 3485–3494
https://doi.org/10.1039/D1TA08853J

Thermally Driven Interfacial Degradation between Li7La3Zr2O12 Electrolyte and LiNi0.6Mn0.2Co0.2O2 Cathode
Y. Kim, D. Kim, R. Bliem, G. Vardar, I. Waluyo, A. Hunt, J. T. Wright, J. P. Katsoudas, and B. Yildiz
Chemistry of Materials 2020, 32 (22), 9531–9541
https://doi.org/10.1021/acs.chemmater.0c02261

‡Equally contributing authors

CONFERENCE PRESENTATIONS

Fabrication of 60μm-Thick Free-Standing Bilayer Solid Electrolytes for Solid-State Batteries Using Solution Processing and Lamination
Y. Kim, C. Juarez-Yescas, D. W. Liao, M. K. Jangid, P. Joshi, H. Yang, and B. Zahiri & P. V. Braun & N. P. Dasgupta
245th ECS Meeting
2024 May 26 – May 30 • San Francisco, CA, U.S.A.

Chemical and Mechanical Degradation of the Interface between Li7La3Zr2O12 Electrolyte and LiNi0.6Mn0.2Co0.2O2 Cathode as a result of Electrochemistry
Y. Kim, S. Chandra, I. Waluyo, A. Hunt and B. Yildiz
243rd ECS Meeting with the 18th International Symposium on Solid Oxide Fuel Cells (SOFC-XVII)
2023 May 28 – Jun 2 • Boston, MA, U.S.A.

In Operando Characterization of Interface Between Al doped Li7La3Zr2O12 Garnet Sold Electrolyte and LiNi0.6Mn0.2Co0.2O2 Cathode by Soft X-Ray Absorption Spectroscopy
Y. Kim and B. Yildiz
23rd International Conference on Solid State Ionics
2022 Jul 17 – Jul 22 • Boston, MA, U.S.A.

Effect of Gas Environment on Interfacial Degradation Between Al Doped Li7La3Zr2O12 Electrolyte and LiNi0.6Mn0.2Co0.2O2 Cathode
Y. Kim and B. Yildiz
2020 MRS Fall Meeting & Exhibit
2020 Nov 28 – Dec 4 • Boston, MA, U.S.A.

PROFESSIONAL SERVICE

Session chair
A04 - Solid State Battery and Manufacturing 2
245th ECS Meeting
2024 May 26 – May 30 • San Francisco, CA, U.S.A.

SKILLS

Characterization

  • X-ray Absorption Near Edge Structure (XANES)

  • Extended X-ray Absorption Fine Structure (EXAFS)

  • X-Ray Diffraction (XRD)

  • Scanning Electron Microscopy (SEM)

Electrochemical Analysis

  • Galvanostatic charge/discharge

  • Electrochemical Impedance Spectroscopy (EIS)

  • Differential capacity (dQ/dV) analysis

  • Cyclic voltammetry

Fabrication

  • Fabrication of All-Solid-State Li-ion Batteries

  • Solid-state synthesis

  • Thin film deposition

  • Slurry casting

Programming

  • Python

  • MATLAB

  • Data Analysis and visualization
    (Curve fitting, noise reduction, peak search)