https://scholar.dgist.ac.kr/handle/20.500.11750/834 2026-11-05T03:40:49Z https://scholar.dgist.ac.kr/handle/20.500.11750/61085 Title: Kinetic origin and mitigation of sudden capacity fade in silicon-based lithium-ion batteries Author(s): Jeon, Jiyun; Kang, Junsik; Park, Dae-woon; Lim, Hyun Hee; Kang, Ayeon; Lee, Hyungjin; Hong, Seung-Tae; Lee, Hochun Abstract: Silicon (Si)-based full cells maintain stable cycling at elevated temperatures yet exhibit a sudden capacity fade at room temperature. This temperature-dependent behavior is specific to Si-based full cells and cannot be explained by conventional graphite-based degradation models. This study identifies the origin of the fade mechanism as a Si-intrinsic, kinetics-driven degradation process and proposes a corresponding mitigation strategy. Electrochemical and post-mortem analyses show that intrinsically sluggish Si kinetics at 25 degrees C induce a large overpotential that drives lithium plating and accelerates surface degradation. Guided by this understanding, a formation strategy is introduced to suppress lithium plating onset, which is shown to prevent sudden capacity fade and improve capacity retention from 38% to 85% in NCM/Si cells and from 55% to 93% in NCM/Si-Gr cells. By elucidating the kinetic origin of the sudden capacity fade and establishing formation engineering as an effective and scalable control strategy, this work addresses key challenges in the practical implementation of high-energy Si-based lithium-ion batteries. (c) 2026 Science Press and Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by Elsevier B.V. and Science Press. All rights are reserved, including those for text and data mining, AI training, and similar technologies. 2026-05-31T15:00:00Z https://scholar.dgist.ac.kr/handle/20.500.11750/61060 Title: Targeting 100% LithiumUtilization in Lithium MetalBatteries Author(s): Choi, Seungwoo; Kim, Juyoung; Seo, Jiyeon; Amine, Khalil; Bai, Peng; Boo, Dae-Kwon; Chen, Zheng; Cho, Yujang; Choi, Jang Wook; Choi, Nam-Soon; Choi, Tae Young; Choi, Wootaek; Cui, Yi; Gallant, Betar M.; Ge, Shiyu; Hatzell, Kelsey B.; Jang, Yushin; Ju, Zhengyu; Jung, Ji-Won; Kim, Hee-Tak; Kim, Ilgyu; Kim, Min-Ho; Kim, Mun Sek; Kim, Patrick Joohyun; Kim, Sang Cheol; Kim, Yaejin; Ko, Seongjae; Koo, Hyegang; Lee, Hochun; Lee, Jiyoung; Li, Ju; Li, Yuzhang; Liu, Ping; Liu, Yijin; Lopez, Jeffrey; McDowell, Matthew T.; Nguyen, Thanh; Oyakhire, Solomon T.; Ramesh, Sapna L.; Sagong, Mingyu; Wang, Nanyang; Warner, Jamie H.; Woo, Sujeong; Xu, Gui-Liang; Xu, Kang; Yao, Yan; Yu, Guihua; Zhang, Ji-Guang; Kim, Il-Doo; Lee, Hongkyung; Lee, Hyun-Wook Abstract: Anode-free lithium metal batteries (AFLMBs) represent the ultimate solution to mankind's quest for the Holy Grail of batteries, where the cell-level energy density is maximized on the assumption that lithium (Li-0) must be fully utilized with near 100% Coulombic efficiency. Although substantial progress has been made since the anode-free concept was first proposed, the challenges presented by the most powerful anode material that can be found on the periodic table still remain unresolved due to its extreme reactive nature, which not only makes it impossible to retain 100% reversibility but also induces inhomogeneity during repeated plating/stripping cycles and persistent capacity loss over a long period of time. The isolated study approaches, emphasizing either individual electrolyte components or interphasial chemistry engineering, but mostly focused on the negative-electrode current collector, hinder insight into issues arising when these components are assembled into cells and forced to interface with each other. In this review, we attempt to examine this high-dimensional topic from a panoramic perspective, with the focus placed on the liquid electrolytes. We first outline the fundamental operating principles of key individual battery components, together with practical perspectives for evaluating lithium utilization and reversibility in AFLMBs. We then discuss how these components interact when assembled into full cells, how such interactions give rise to heterogeneous electrochemical and mechanical behaviors, and how these phenomena can be characterized and regulated. It is also outlined that a hierarchical perspective on lithium behavior, spanning from the nano- to cell-scale, is essential to enable plating, stripping, and recovery in AFLMBs. Finally, we present perspectives from leading researchers actively working on the various elements that constitute AFLMBs and integrate these viewpoints to clarify the future research directions of this field. By providing a system-level framework for understanding AFLMBs, this review aims to guide future research efforts and contribute to addressing the broader challenges of sustainable energy storage. 2026-07-31T15:00:00Z https://scholar.dgist.ac.kr/handle/20.500.11750/60875 Title: Kinetic origin and mitigation of sudden capacity fade in silicon-based lithium-ion batteries Author(s): Jeon, Jiyun; Kang, Junsik; Park, Dae-woon; Lim, Hyun Hee; Kang, Ayeon; Lee, Hyungjin; Hong, Seung-Tae; Lee, Hochun Abstract: Silicon (Si)-based full cells maintain stable cycling at elevated temperatures yet exhibit a sudden capacity fade at room temperature. This temperature-dependent behavior is specific to Si-based full cells and cannot be explained by conventional graphite-based degradation models. This study identifies the origin of the fade mechanism as a Si-intrinsic, kinetics-driven degradation process and proposes a corresponding mitigation strategy. Electrochemical and post-mortem analyses show that intrinsically sluggish Si kinetics at 25 degrees C induce a large overpotential that drives lithium plating and accelerates surface degradation. Guided by this understanding, a formation strategy is introduced to suppress lithium plating onset, which is shown to prevent sudden capacity fade and improve capacity retention from 38% to 85% in NCM/Si cells and from 55% to 93% in NCM/Si-Gr cells. By elucidating the kinetic origin of the sudden capacity fade and establishing formation engineering as an effective and scalable control strategy, this work addresses key challenges in the practical implementation of high-energy Si-based lithium-ion batteries. (c) 2026 Science Press and Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by Elsevier B.V. and Science Press. All rights are reserved, including those for text and data mining, AI training, and similar technologies. 2026-05-31T15:00:00Z https://scholar.dgist.ac.kr/handle/20.500.11750/60327 Title: 리튬 이차전지 Author(s): 박도희; 이호춘; 오정우; 이철행; 박종원