Kyung Hee University · 工学
Professor Jae Su Yu's research lab specializes in the design, synthesis, and application of advanced functional materials for energy conversion and storage, with a strong focus on luminescent phosphors and electrochemical energy devices. The lab explores novel oxide-based materials—particularly rare-earth doped phosphors and vanadium-based oxides—for applications in solid-state lighting, temperature sensing, and next-generation batteries such as aqueous zinc-ion and multivalent ion batteries. Key research directions include nanostructure engineering, interface modulation, and the integration of carbon materials to enhance electrochemical performance and thermal stability.
Figures are computed from collected data and may differ slightly.
Through a solid-phase reaction technique, Sm<sup>3+</sup> and Bi<sup>3+</sup> co-doped La<sub>3</sub>BWO<sub>9</sub> phosphors with high emission intensity and sensitive temperature sensing properties have been successfully synthesized. Based on XRD Rietveld refinement, the optimized crystal structure was used as the original model to calculate the band structure and partial density of states (PDOS) by density functional theory (DFT) calculations. The luminescence characteristics of Sm<sup>3+</s
Abstract Aqueous zinc‐ion batteries (AZIBs) are widely attractive by virtue of its high safety and low cost. However, their development for widespread applications is limited due to unstable cathode materials. Herein, a manganese vanadium oxide (Mn 2 V 2 O 7 /V 2 O 3 ) (MnVO) composite is fabricated and can be utilized as a superior intercalated cathode for AZIBs. The extraction of Zn 2+ from the MnVO composite causes the phase transition during the initial charge cycle to form electrochemically
Vanadium-based hybrid metal oxides have a crystalline layer structure and excellent kinetics for high-power-density lithium (Li)-ion batteries. Different oxidation levels and harmonizing chemistry of vanadium need a cost-effective and robust integration approach for the proportion of their form and surface benefits. One of the most attractive methodologies for obtaining pure phase and unique development over varying temperature and pressure conditions is to use hydrothermal technique. Herein, a
Two-dimensional (2D) plate-like porous NiO–Ni2O3 nanostructure (NS) arrays are successfully deposited over the carbon fiber cloth (CF) via a hydrothermal method, followed by calcination. Hybridization of 2D plate-like porous NiO–Ni2O3 NS with CF created 3D porous [email protected]–Ni2O3 hybrid composite (HC) (binder-free) which was investigated as an anode material for both lithium-ion batteries (LIBs) and sodium-ion batteries (SIBs). The powder NiO–Ni2O3 NS (with binder) anode delivered dischar
Current research on supercapacitors focuses on achieving high specific energy by expanding the voltage window and improving specific capacitance through advanced electrode design. This study presents a new type of pseudocapacitive integrated electrode developed by decorating α-Fe2O3 nanoparticles onto NH4V3O8 multiwalled nanotubes using a simple and efficient method. α-Fe2O3 stores energy through conversion reactions, while NH4V3O8 facilitates intercalation-based storage. The difference in work
ABSTRACT Thermal quenching has long plagued rare‐earth‐doped luminescent materials as an inherent limitation, severely hampering their practical deployment in complex environments. Herein, novel orange‐red‐emitting K 3 Sc(PO 4 ) 2 :Sm 3+ phosphors with anti‐thermal quenching behavior have been successfully synthesized. The resultant samples have a trigonal crystal structure with space group P, where Sm 3+ ions occupied two distinct Sc 3+ lattice sites, inducing crystal field splitting and conseq
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