Korea University · Engineering
Professor Yongku Kang's research lab specializes in advanced energy storage materials, with a primary focus on lithium–oxygen and lithium–carbon dioxide batteries. The lab investigates novel electrocatalysts, such as hierarchical Ru- and RuO₂-based foams, and nanostructured anodes like Si/CNT@C core–shell fibers to enhance cyclability, reduce overpotentials, and improve oxygen and carbon dioxide efficiency. A key research direction involves optimizing electrolyte systems—such as tetramethylene sulfone with LiNO₃—to stabilize the electrochemical interface and enable long-term cycling. The lab employs advanced characterization techniques, including in situ XPS, DEMS, and TEM, to probe reaction mechanisms and surface active sites in complex oxide catalysts and porous architectures.
Figures are computed from collected data and may differ slightly.
Hierarchical Ru- and RuO<sub>2</sub>-foams show excellent cyclability and good oxygen efficiency when used as catalyst cathode material for lithium–oxygen batteries.
Lithium‐oxygen batteries represent a significant scientific challenge for high‐rate and long‐term cycling using oxygen electrodes that contain efficient electrocatalysts. The mixed transition metal oxide catalysts provide the most efficient catalytic activity for partial heterogeneous surface cations with oxygen vacancies as the active phase. They include multiple oxidation states and oxygen vacancies. Here, using a combination of transmission electron microscopy, differential electrochemical ma
We report a simple two-step fabrication process of 3D porous Si/copper films by an electrodeposition method using a hydrogen gas bubble template. A 3D porous Si/copper film provides a large surface area, a highly conductive pathway, a short ion diffusion length, and buffer spaces to accommodate the stress during the cycling processes.
To fabricate a sustainable lithium-oxygen (Li-O<sub>2</sub>) battery, it is crucial to identify an optimum electrolyte. Herein, it is found that tetramethylene sulfone (TMS) and lithium nitrate (LiNO<sub>3</sub>) form the optimum electrolyte, which greatly reduces the overpotential at charge, exhibits superior oxygen efficiency, and allows stable cycling for 100 cycles. Linear sweep voltammetry (LSV) and differential electrochemical mass spectrometry (DEMS) analyses reveal that neat TMS is stabl
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