Young Soo Yun

Although the lithium-metal anode (LMA) can deliver a high theoretical capacity of ≈3860 mAh g^-1 at a low redox potential of -3.040 V (vs the standard hydrogen electrode), its application in rechargeable batteries is hindered by the poor Coulombic efficiency and safety issues caused by dendritic metal growth. Consequently, careful electrode design, electrolyte engineering, solid-electrolyte interface control, protective layer introduction, and other strategies are suggested as possible

A systematic investigation established a significant correlation between the 2D to G band intensity ratio ( I 2D / I G ) in the Raman spectrum and the internal kinetic barrier for sodium-ion transfer, achieving the highest sodium plateau capacity of ∼400 mA h g −1 (A30 sample).

Diamond metal-insulator-semiconductor diodes and field-effect transistors (MISFETs) have been prepared using CaF2 gate insulator and nondoped (in some cases, boron was doped) diamond homoepitaxial films. The resultant capacitance-voltage (C-V) curves and drain current-drain voltage (ID−VD) curves strongly depended on the amount of oxygen contamination of diamond surface. From analyses of C-V and ID−VD curves, it was found that the oxygen contamination induced the surface states with two distribu

Thin pyroprotein coating layers containing numerous oxygen and nitrogen heteroatoms were introduced on the surface of CFs (P-CFs), and their catalytic effects on the redox reaction of V²⁺/V³⁺ couples for VRFBs were investigated.

A distinctive solid-solution potassium-ion intercalation behavior of disordered graphitic carbon materials was observed.

Abstract Studies on three‐dimensional structured carbon templates have focused on how to guide homogeneous lithium metal nucleation and growth for lithium metal anodes (LMAs). However, there is still insufficient evidence for a key factor to achieve their high electrochemical performance. Here, the effects of nanopores and sulfur doping on carbon‐based nanoporous host (CNH) electrode materials for LMAs were investigated using natural polymer‐derived CNHs. Homogeneous pore‐filling behaviors of li

Abstract Zinc metal anodes (ZMA) have high theoretical capacities (820 mAh g −1 and 5855 mAh cm −3 ) and redox potential (−0.76 V vs. standard hydrogen electrode), similar to the electrochemical voltage window of the hydrogen evolution reaction (HER) in a mild acidic electrolyte system, facilitating aqueous zinc batteries competitive in next‐generation energy storage devices. However, the HER and byproduct formation effectuated by water‐splitting deteriorate the electrochemical performance of ZM

3D-structured bifunctional MXene paper electrode (3D-BMPE), which has distinctive material properties, was fabricated to protect Al deposition/dissolution reactions with improved redox kinetics.

Rechargeable sodium batteries (RSBs) suffer from an absence of suitable active anode materials and noncompetitive energy density because the intercalation chemistry used in well-established lithium ion batteries is unsuitable for larger and heavier sodium ion based batteries. Hence, new types of active anode materials with high performance are needed to realize feasible RSBs. This study examined the effects of carbon-based electrode materials on the most promising sodium metal anode with a high

Potassium intercalation mechanism in graphitic carbon materials is known to be a staging reaction similar to that of lithium, despite their antithetic intercalation trend in turbostratic carbon (TBC) materials. This study clarified the distinctive potassium intercalation behavior of graphitic carbon materials with different local microstructures through a systematic comparative investigation. In contrast to the monotonic stacking sequence of lithium-intercalated graphitic carbon materials, multi