https://scholar.dgist.ac.kr/handle/20.500.11750/12111 2026-04-22T02:58:02Z https://scholar.dgist.ac.kr/handle/20.500.11750/56585 Title: 이차전지용 음극, 이를 포함하는 이차전지 및 이의 제조방법 Author(s): 이종원; 윤종혁; 신홍림 https://scholar.dgist.ac.kr/handle/20.500.11750/48138 Title: 이차전지용 음극 활물질 및 이의 제조방법 Author(s): 박민식; 이종원 Abstract: 본 발명은 질소,제1금속 및 제2금속을 포함하는 다공성 탄소체를 포함하며, 상기 제1금속은Zn, Co, Cu, Ti, Hf, Zr, Ni, Mg, Ti, V, Cr, Fe및Al중에서 선택된1종 이상이고, 상기 제2금속은Pt, Al, Mg, Zn, Ag, Au, Si, Sb및 Sn중에서 선택된1종 이상인,이차 전지용 음극 활물질을 제공한다. https://scholar.dgist.ac.kr/handle/20.500.11750/46227 Title: Electrode-level strategies enabling kinetics-controlled metallic Li confinement by the heterogeneity of interfacial activity and porosity Author(s): Shin, Hong Rim; Kim, Siwon; Park, Junho; Kim, Jung Ho; Park, Min -Sik; Lee, Jong-Won Abstract: Three-dimensional (3D) host architectures have emerged as promising strategies for resolving the critical issues of Li metal anodes, namely, severe volume changes and growth of Li dendrites during battery cycling. However, preferential Li plating on top of the host architecture often causes early cell failure. Herein, we demonstrate that the controlled heterogeneity of interfacial activity and the porous structure at the electrode level enables confined Li metal storage in host architectures consisting of metal-organic framework (MOF)-derived carbon. 3D electrochemical simulations show that carbon activity (lithiophilicity) and interparticle porosity play critical roles in controlling the competing kinetics of charge transfer and Li+ transport, thereby regulating the Li-plating behavior. The enhanced lithiophilicity at the electrode bottom, combined with the increased interparticle porosity at the top, is predicted to promote the preferential nucleation of Li and subsequent upward growth from the bottom. Based on the proposed design principles, high-capacity and long-cycling host architectures based on MOF-derived carbon are constructed via two-step electrophoretic deposition (EPD): densely populated Ag-incorporated carbon at the bottom in combination with sparsely populated Ag-free carbon at the top. The heterogeneous host architecture fabricated by EPD spatially confines a large amount of Li metal (6 mAh cm–2) without significant volume changes and exhibits a long cycle lifetime of over 900 cycles. This study provides an effective strategy for designing advanced Li metal anodes by controlling the competing reaction kinetics in 3D host architectures. © 2023 Elsevier B.V. 2023-01-31T15:00:00Z https://scholar.dgist.ac.kr/handle/20.500.11750/17491 Title: Mechanistic Insight into Wettability Enhancement of Lithium-Ion Batteries Using a Ceramic-Coated Layer Author(s): Jeon, Dong Hyup; Song, Jung-Hoon; Yun, Jonghyeok; Lee, Jong-Won Abstract: The crucial issue of wettability in high-energy-density lithium-ion batteries (LIBs) has not been comprehensively addressed to date. To overcome the challenge, state-of-the-art LIBs employing a ceramic-coated separator improves the safety- and wettability-related aspects of LIBs. Here, we present a mechanistic study of the effects of a ceramic-coated layer (CCL) on electrode wettability and report the optimal position of the CCL in LIBs. The electrolyte wetting was investigated using the multiphase lattice Boltzmann method and electrochemical impedance spectroscopy for capturing the electrolyte-transport dynamics in porous electrodes and impedance spectra in pouch-type LIBs, respectively. Results indicate that the CCL caused the velocity vector to transport the electrolyte further, resulting in an increase in the wetting rate. Moreover, the location of the CCL considerably affected the wettability of the LIBs. This study provides mechanical insight into the design and fabrication of high-performance LIBs by incorporating CCLs. © 2022 American Chemical Society. 2022-12-31T15:00:00Z