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Research Objectives
We aim to solve outstanding problems in electrochemical systems (e.g. batteries) by harnessing electrochemistry and materials science. We study reactions at electrochemical interfaces with advanced characterization techniques and design energy materials thereafter. We are a creative and adaptive team.
Research Area
Monitoring and Tracking Reactions at Electrochemical Interfaces
Reactions at electrochemical interfaces involve non-Faradaic charge transfer to electrolytes whose reduction/oxidation produces beneficial electrode–electrolyte interphases or detrimental side products. They govern the efficiency of following Faradaic charge transfer reactions. Therefore, understanding the nature of interfacial reactions is at the heart of developing electrochemical systems. We exploit advanced in-situ, microscopic, and spectroscopic techniques to monitor and track reactions at electrochemical interfaces, paving the way for highly efficient electrochemical systems.
Related Publications:
Y. Ko et al., Omics-Enabled Understanding of Electric Aircraft Battery Electrolytes, Joule, 8, 2393 (2024)
K. Kim and Y. Ko et al., Macroscale Inhomogeneity in Electrochemical Lithium-Metal Plating Triggered by Electrolyte-Dependent Gas Phase Evolution, Advanced Energy Materials, 14, 2304396 (2024)
Elucidating Fundamentals of Reactions in Electrochemical Systems
Major materials in electrochemical systems such as electrodes, electrolytes, catalysts, etc, experience characteristic electrochemical and chemical reactions. Then, the ensemble of all the reactions determines the resulting performance of the systems. Underlying the ensemble are complicated interactions between materials and associated reactions. We aim to elucidate the fundamentals and working principles of reactions, such as mechanisms or kinetics, and their consequences on the performance of systems.
Related Publications:
K. Kim and Y. Ko et al., Macroscale Inhomogeneity in Electrochemical Lithium-Metal Plating Triggered by Electrolyte-Dependent Gas Phase Evolution, Advanced Energy Materials, 14, 2304396 (2024)
Y. Ko and K. Kim et al., Redox Mediators for Oxygen Reduction Reactions in Lithium–Oxygen Batteries: Governing Kinetics and Its Implications, Energy & Environmental Science, 16, 5525 (2023)
Y. Ko et al., Comparative Kinetic Study of Redox Mediators for High-Power Lithium–Oxygen Batteries, Journal of Materials Chemistry A, 7, 6491 (2019)
Designing Energy Materials for Next-Generation Batteries
The development of energy materials is at the core of bringing breakthroughs in battery technology by enabling new chemistry beyond conventional batteries. We leverage our knowledge in electrochemistry and materials science to design energy materials for next-generation batteries such as alkali metal batteries, sodium-ion batteries, metal–oxygen batteries, and all-solid-state batteries.
Related Publications:
Y. Ko and J. Bae et al., Topological Considerations in Electrolyte Additives for Passivating Silicon Anodes with Hybrid Solid–Electrolyte Interphases, ACS Energy Letters, 9, 3448 (2024)
Y. Ko et al., Omics-Enabled Understanding of Electric Aircraft Battery Electrolytes, Joule, 8, 2393 (2024)
Y. Ko and H.-I Kim et al., Liquid-Based Janus Electrolyte for Sustainable Redox Mediation in Lithium–Oxygen Batteries, Advanced Energy Materials, 11, 2102096 (2021)
Y. Ko et al., Anchored Mediator Enabling Shuttle-Free Redox Mediation in Lithium–Oxygen Batteries, Angewandte Chemie International Edition, 59, 5376 (2020)
Y. Ko et al., Biological Redox Mediation in Electron Transport Chain of Bacteria for Oxygen Reduction Reaction Catalysts in Lithium–Oxygen Batteries, Advanced Functional Materials, 29, 18005623 (2019)
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