https://scholar.dgist.ac.kr/handle/20.500.11750/1194 2026-04-25T01:32:23Z 2026-04-25T01:32:23Z Choi, Juhyung Park, Sejin Kim, Dayeon Kim, Hyun Chul Yun, Hyewon Hong, Yewon An, Hyun Ji Lee, Taemin Lee, Noho Kim, Jaeeun Nam, Dae-Hyun Oh, Hyung-Suk Hwang, Yun Jeong https://scholar.dgist.ac.kr/handle/20.500.11750/60309 2026-04-20T18:01:19Z 2025-09-30T15:00:00Z

Title: Cu Nanoparticle Infiltration via Metal-Organic Decomposition Ink for Superior Mass Activity in CO Electroreduction Author(s): Choi, Juhyung; Park, Sejin; Kim, Dayeon; Kim, Hyun Chul; Yun, Hyewon; Hong, Yewon; An, Hyun Ji; Lee, Taemin; Lee, Noho; Kim, Jaeeun; Nam, Dae-Hyun; Oh, Hyung-Suk; Hwang, Yun Jeong Abstract: Achieving stable operation at high currents remains challenging for gas diffusion electrode (GDE)-based CO electrolyzers. Herein, we demonstrate the importance of Cu nanoparticle infiltration into the microporous layer to enrich local CO accessibility and mitigate electrolyte crossover. A facile GDE preparation method is developed via the doctor-blading method using a Cu metal-organic decomposition (Cu MOD) ink to produce well-dispersed nanoparticles across the porous layer. This design produces highly selective C2+ products at -1200 mA cm-2 from the CO electroreduction reaction, achieving a remarkably high mass activity of approximately -28,000 A g-1. It is found that the Cu electrodes prepared by MOD improve a stable balanced gas-liquid-solid interface by CO transport across the hydrophobic microenvironment of the inherent microporous layer. Our insights offer perspectives on a scalable strategy for optimizing catalyst positioning and advancing stable GDEs with high mass activity.

2025-09-30T15:00:00Z Jang, Hyun Woo Kang, Ko-Ku Eom, Jun Ho Ryu, Seong Min Jang, Ahreum Kim, Jong Gi Ryu, Geon Woo Yun, Junhyeok Yu, Seungbum Lee, Hyun Jin Jung, Han Yong, Sang Soon Kim, Young Ho https://scholar.dgist.ac.kr/handle/20.500.11750/60235 2026-04-15T08:11:09Z 2025-12-31T15:00:00Z

Title: Influence of absorber/barrier strain on 1/f noise characteristic of very long wavelength infrared detectors with InAs/GaSb superlattice Author(s): Jang, Hyun Woo; Kang, Ko-Ku; Eom, Jun Ho; Ryu, Seong Min; Jang, Ahreum; Kim, Jong Gi; Ryu, Geon Woo; Yun, Junhyeok; Yu, Seungbum; Lee, Hyun Jin; Jung, Han; Yong, Sang Soon; Kim, Young Ho Abstract: Reducing 1/f noise is critical for enhancing VLWIR detector performance. However, its origin in T2SL nBn detectors remains unclear. In this study, we demonstrate that lattice mismatch at the absorber/barrier interface significantly contributes to 1/f noise. Structural and electrical analyses of three InAs/GaSb T2SL detectors reveal that increased absorber/barrier strain correlates directly with higher trap-assisted tunneling (TAT) current and greater 1/f noise. Our findings indicate a proportional relationship between interface strain, trap density, and 1/f noise magnitude, suggesting strain engineering as a promising strategy to suppress 1/f noise in VLWIR nBn detectors. © © 2025. Published by Elsevier B.V.

2025-12-31T15:00:00Z Cao, Shihai Sun, Yuntong Li, Yinghao Wang, Ao Zhang, Wenyao Hao, Zhendong Lee, Jong-Min https://scholar.dgist.ac.kr/handle/20.500.11750/60233 2026-04-15T18:01:49Z 2025-12-31T15:00:00Z

Title: Multifunctional Dipoles Enabling Enhanced Ionic and Electronic Transport for High-Energy Batteries Author(s): Cao, Shihai; Sun, Yuntong; Li, Yinghao; Wang, Ao; Zhang, Wenyao; Hao, Zhendong; Lee, Jong-Min Abstract: Achieving high-energy density remains a key objective for advanced energy storage systems. However, challenges, such as poor cathode conductivity, anode dendrite formation, polysulfide shuttling, and electrolyte degradation, continue to limit performance and stability. Molecular and ionic dipole interactions have emerged as an effective strategy to address these issues by regulating ionic transport, modulating solvation structures, optimizing interfacial chemistry, and enhancing charge transfer kinetics. These interactions also stabilize electrode interfaces, suppress side reactions, and mitigate anode corrosion, collectively improving the durability of high-energy batteries. A deeper understanding of these mechanisms is essential to guide the design of next-generation battery materials. Herein, this review summarizes the development, classification, and advantages of dipole interactions in high-energy batteries. The roles of dipoles, including facilitating ion transport, controlling solvation dynamics, stabilizing the electric double layer, optimizing solid electrolyte interphase and cathode-electrolyte interface layers, and inhibiting parasitic reactions-are comprehensively discussed. Finally, perspectives on future research directions are proposed to advance dipole-enabled strategies for high-performance energy storage. This review aims to provide insights into the rational design of dipole-interactive systems and promote the progress of electrochemical energy storage technologies.

2025-12-31T15:00:00Z Zhuang, Yi Liang, Yukai Zhang, Wenyao Sun, Yuntong Wang, Zhenxing Guan, Jingyan Zhu, Boyuan Cui, Junjie Tang, Jiahao Lee, Jong-Min Zhu, Junwu https://scholar.dgist.ac.kr/handle/20.500.11750/60231 2026-04-15T18:01:48Z 2025-12-31T15:00:00Z

Title: Rational Electrolyte Structure Engineering for Highly Reversible Zinc Metal Anode in Aqueous Batteries Author(s): Zhuang, Yi; Liang, Yukai; Zhang, Wenyao; Sun, Yuntong; Wang, Zhenxing; Guan, Jingyan; Zhu, Boyuan; Cui, Junjie; Tang, Jiahao; Lee, Jong-Min; Zhu, Junwu Abstract: Aqueous zinc-ion batteries (AZIBs) have garnered considerable attention as promising post-lithium energy storage technologies owing to their intrinsic safety, cost-effectiveness, and competitive gravimetric energy density. However, their practical commercialization is hindered by critical challenges on the anode side, including dendrite growth and parasitic reactions at the anode/electrolyte interface. Recent studies highlight that rational electrolyte structure engineering offers an effective route to mitigate these issues and strengthen the electrochemical performance of the zinc metal anode. In this review, we systematically summarize state-of-the-art strategies for electrolyte optimization, with a particular focus on the zinc salts regulation, electrolyte additives, and the construction of novel electrolytes, while elucidating the underlying design principles. We further discuss the key structure-property relationships governing electrolyte behavior to provide guidance for the development of next-generation electrolytes. Finally, future perspectives on advanced electrolyte design are proposed. This review aims to serve as a comprehensive reference for researchers exploring high-performance electrolyte engineering in AZIBs.

2025-12-31T15:00:00Z