https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/179 2026-07-04T03:12:58Z 2026-07-04T03:12:58Z Wang, Jian Sun, Zhaowei Wang, Yafei Wang, Kaizhao Wang, Xinyue Hwang, Jang-Yeon Liu, Feng Hu, Jin Xiong, Shizhao https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/212305 2026-04-22T02:30:16Z 2026-07-01T00:00:00Z

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 Park, Hyeona Lee, Chaiwon Yang, Yul Kansara, Shivam Hwang, Jang-Yeon https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/212883 2026-05-29T08:00:12Z 2026-07-01T00:00:00Z

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 Lee, Seokjin Lim, Sunhyuk Choi, Gyuhyeon Bae, Sang Woo Bae, Koungyul Bae, Sangkyun Kim, Young-Hoon Park, Hyunjin https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/212517 2026-05-09T05:00:57Z 2026-07-01T00:00:00Z

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 Kim, Tae-Ho Lee, Su Hwan Lee, Jin Kyu Oh, Hyerim Kim, Kijung Lee, Byungchan Kim, Young-Hoon https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/212471 2026-04-30T06:30:19Z 2026-06-01T00:00:00Z

Title: Comprehensive electrolyte extraction and quantitative analysis reveal formation-induced electrolyte reactions in lithium-ion batteries Authors: Kim, Tae-Ho; Lee, Su Hwan; Lee, Jin Kyu; Oh, Hyerim; Kim, Kijung; Lee, Byungchan; Kim, Young-Hoon Abstract: As the global demand for lithium-ion batteries (LIBs) continues to rise, significant research and industrial efforts have been devoted to improving their active components. Recently, electrolytes, serving as essential carriers for lithium ions, have attracted increasing attention, as their total quantity and compositional changes during electrochemical reactions critically determine cell stability and performance. Despite ongoing efforts to develop advanced electrolytes through various organic solvents and functional additives, the ability to qualitatively and quantitatively evaluate electrolytes during cell formation and operation remains limited. Here, we present a systematic strategy to quantify the absolute amounts of electrolyte components in LIBs incorporating graphite// Li(Ni0.6Co0.2Mn0.2)O2 electrodes, revealing previously unrecognized side reactions and electrolyte consumption during the formation process. To achieve this, we developed optimized extraction method with a relative mass deviation of less than 0.153%. Through complementary liquid chromatography and nuclear magnetic resonance analysis, we identified that approximately 21% of the injected electrolyte (ethylene carbonate, ethyl methyl carbonate, and diethyl carbonate) underwent side reactions to form new compounds (dimethyl 2,5-dioxahexanedioate, dimethyl carbonate, and diethyl 2,5-dioxahexanedioate) during formation. These findings provide fundamental insights into electrolyte degradation pathways and byproduct formation, offering valuable design guidelines for developing next-generation electrolytes that enhance the performance and durability of LIBs.

2026-06-01T00:00:00Z