Sungkyunkwan University · Engineering
Professor Hyunyoung Park's research lab specializes in the development of advanced functional materials for next-generation energy storage systems, with a primary focus on lithium-sulfur, sodium-ion, and potassium-ion batteries. The lab emphasizes innovative materials design—such as nanostructured separators, metal-organic frameworks, and layered double hydroxides—to suppress polysulfide shuttling, enhance reaction kinetics, and improve structural stability. Key research directions include the rational engineering of conductive and catalytic matrices, functional coatings for current collectors, and the molecular-level tuning of redox-active components for high-performance batteries.
Figures are computed from collected data and may differ slightly.
Abstract The practical application of lithium–sulfur batteries (LSBs) is limited by the shuttle effect of lithium polysulfides (LiPSs), large volume expansion, and sluggish conversion kinetics of sulfur. Herein, the crystallinity regulation of Ni x Fe y alloy anchored on oxidized carbon nanotube/nitrogen‐doped graphene (Ni x Fe y @OCNT/NG) for application of a functional separator into LSBs is demonstrated. A low crystalline Ni x Fe y @OCNT/NG (LC‐Ni x Fe y @OCNT/NG) modified polypropylene separ
Functional separators, which are chemically modified and coated with nanostructured materials, are considered an effective and economical approach to suppressing the shuttle effect of lithium polysulfide (LiPS) and promoting the conversion kinetics of sulfur cathodes. Herein, we report cobalt-aluminum-layered double hydroxide quantum dots (LDH-QDs) deposited with nitrogen-doped graphene (NG) as a bifunctional separator for lithium-sulfur batteries (LSBs). The mesoporous LDH-QDs/NG hybrids posses
Abstract Metal phthalocyanine (Pc) complexes are considered to be promising functional organic materials owing to their tunable properties and unique π‐electron structure. Despite these advantages, the application of polymeric metal Pc into lithium–sulfur (LiS) batteries has yet to be explored. Herein, this work demonstrates a molecular design of multifunctional polymeric cobalt Pc with triethylene glycol linkers (TCP) that provide a redox mediating capability for the Co ion in the center of th
T-Na<sub>2</sub>Fe<sub>2</sub>F<sub>7</sub> based on three-dimensionally connected FeF<sub>6</sub> octahedra exhibits large specific capacity and ultra-high-stable cycling performance as a promising cathode for NIBs.
Abstract As a promising candidates for next‐generation secondary battery system, sodium‐ion (Na‐ion) batteries and potassium‐ion (K‐ion) batteries are recently attracting considerable attention because of their cost‐effectiveness and similar reaction mechanism to that of lithium‐ion batteries. However, the major challenges for their practical application are sluggish ionic kinetic with excessive volume change of the cathode material, caused by larger ionic radius than Li + ion. The current deman
The K<sub>1.5</sub>VOPO<sub>4</sub>F<sub>0.5</sub> crystal structure provides a robust structural framework with large two-dimensional pathways, contributing to facile K<sup>+</sup> diffusion despite the large ionic radius of K<sup>+</sup> ions.
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