https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/178 2026-07-04T02:27:15Z https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/212305 Title: Navigating structure-kinetics-capacity trilemma for anode materials in sodium-ion batteries Authors: Wang, Jian; Sun, Zhaowei; Wang, Yafei; Wang, Kaizhao; Wang, Xinyue; Hwang, Jang-Yeon; Liu, Feng; Hu, Jin; Xiong, Shizhao Abstract: With the rapid development of an energy-consuming society, the modern world is eager for high-performance and low-cost energy storage technologies such as sodium-ion batteries (SIBs). The numerous proposals for SIB anode materials, however, are inherently governed by the Structure–Kinetics–Capacity (SKC) Trilemma, which captures the trade-off among structural integrity, fast sodiation/desodiation kinetics, and high specific capacity. This review critically analyzes recent progress in SIB anode engineering through the lens of this trilemma. We systematically deconstruct how intercalation, adsorption/desorption, alloying, and conversion anodes occupy distinct compromise regions, and we summarize how electrolyte-derived interphases modulate kinetics and stability across these classes. We then evaluate key engineering strategies, including nanosizing, carbon compositing, and electrolyte/interphase regulation, as targeted efforts to mitigate competing demands and expand the performance envelope, supported by a quantitative radar-plot benchmark with transparent normalization. To strengthen practical relevance beyond half-cell data, we discuss full-cell translation criteria, including N/P balancing, sodium inventory loss associated with low initial Coulombic efficiency (ICE), pre-sodiation and sodium-compensation routes, and cathode matching. We further compare dominant degradation mechanisms and clarify how structural and interphase instabilities trigger transport decay, polarization growth, and capacity fading within the trilemma framework. Finally, we outline future directions that may transcend conventional trade-offs, including atomically precise material design, operando characterization with multiscale modeling, scalable electrolyte-by-design, and emerging non-equilibrium synthesis such as high-temperature shock synthesis. By providing this unified conceptual framework, this review aims to guide the design of next-generation anodes that more holistically resolve the trilemma, propelling SIBs toward practical, high-performance energy storage. 2026-07-01T00:00:00Z https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/212883 Title: Electrochemical catalytic interface toward high-energy density lithium-sulfur batteries Authors: Park, Hyeona; Lee, Chaiwon; Yang, Yul; Kansara, Shivam; Hwang, Jang-Yeon Abstract: Lithium-sulfur (Li-S) batteries with lithium sulfide (Li2S) cathodes are promising candidates for next-generation batteries owing to their high energy density and compatibility with lithium-free anode materials. However, Li2S cathodes face challenges arising from high activation energy barriers and the shuttle effect of polysulfide intermediates. Herein, we present an innovative strategy to maximize the energy density and cycle life of Li-S batteries by integrating a pelletized Li2S/graphene-carbon nanotubes (Li2S/Gr-CNTs) composite cathode with a Ti3C2Tx MXene /CNTs composite interlayer (Int. M). Through high-pressure pelletization, the Gr-CNTs physically entrap Li2S particles, confining them within a robust structural framework while preserving excellent electrically conductive pathways. Int. M placed on the surface of the Li2S/Gr-CNTs composite cathode functions as a catalytic interface with strong affinity for polysulfide intermediates and mixed ionic/electronic conducting properties, thereby promoting electrochemical conversion reactions. The integration of Li2S/Gr-CNTs (with 90 wt% Li2S content) with Int. M maintains the ultra-thin electrode thickness of 109 μm and achieves an areal capacity of 8 mAh cm−2 at 0.1 C, resulting in a high volumetric capacity of 734 mAh cm−3. The Li-S full batteries coupling with a graphite anode demonstrate unprecedented capacity retention of ∼80% after 1000 cycles at 0.5 C. 2026-07-01T00:00:00Z https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/212517 Title: Comparative study of poly(para-xylylene) derivatives as gate dielectrics for organic field-effect transistors Authors: Lee, Seokjin; Lim, Sunhyuk; Choi, Gyuhyeon; Bae, Sang Woo; Bae, Koungyul; Bae, Sangkyun; Kim, Young-Hoon; Park, Hyunjin Abstract: Poly(para-xylylene) (Parylene) has attracted considerable attention as a gate dielectric material for organic field-effect transistors (OFETs) owing to its conformal and facile deposition, excellent mechanical flexibility, and reliable dielectric properties. Despite these advantages, the dielectric properties of different Parylene derivatives have not yet been systematically compared, and the influence of their chemical structures on the device performance and long-term bias stability of OFETs remains insufficiently understood. Here, we present a comprehensive comparative study of commercially available Parylene derivatives as gate dielectrics for OFETs. By correlating their dielectric properties with device performance and long-term bias stability, this work elucidates the critical role of chemical structure in governing charge transport behavior and interfacial characteristics. Furthermore, the results provide practical design guidelines for selecting and engineering Parylene-based gate dielectrics, thereby offering a systematic strategy for the development of high-performance flexible electronics. 2026-07-01T00:00:00Z https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/216081 Title: 고성능 리튬이온전지용 분무건조 기반 Si-TiO2-C 복합 음극재의 조성 최적화 Authors: 황장연 2026-06-11T00:00:00Z