https://scholar.dgist.ac.kr/handle/20.500.11750/6123 2026-10-20T13:25:28Z https://scholar.dgist.ac.kr/handle/20.500.11750/61009 Title: A thermally conductive ceramic-coated separator with in situ-formed ion-conductive, lithiophilic interphase for stable lithium metal batteries☆ Author(s): Choi, Seungyeop; Choi, Junhyeok; Kang, Dongyoon; Dzakpasu, Cyril Bubu; Kim, Ucheol; Seo, Jun Pyo; Roh, Youngjoon; Rhee, Junki; Lee, Yong Min Abstract: The design of functional separators that can simultaneously regulate interfacial stability and safety remains a critical challenge in lithium metal batteries (LMBs). In this work, we introduce an aluminum nitride-based ceramic-coated separator (AlN-CCS) to address these concerns. The AlN-CCS exhibits enhanced ionic conductivity and electrolyte wettability compared to conventional polyethylene separators, while maintaining comparable physical and ion-conductive properties to oxide-based CCSs. Importantly, the conversion reaction between AlN and Li metal induces the in situ formation of a Li3N-rich solid-electrolyte interphase and a lithiophilic LiAl alloy, effectively reducing nucleation overpotential and promoting uniform Li deposition. As a result, Li||LiNi0.6Co0.2Mn0.2O2 full cells with AlN-CCS demonstrate significantly improved cycling stability, achieving 76.6% capacity retention even after 500 cycles, compared to 59.6% for Al2O3-CCS. Furthermore, owing to the intrinsically high thermal conductivity of AlN, the AlN-CCS enables efficient lateral heat dissipation, effectively mitigating localized hotspot formation under abnormal conditions such as internal short circuits. These results demonstrate that nitride-based CCSs can be an effective and easier alternative to simultaneously enhance electrochemical performance and safety, offering a promising pathway toward high-energy-density and reliable LMBs. 2026-09-30T15:00:00Z https://scholar.dgist.ac.kr/handle/20.500.11750/60991 Title: Electrolyte Lubricants for Solid-State Batteries Author(s): Kim, Won-Yeong; Ryu, Seokhyeon; Lee, Hyobin; Kim, Minwoo; Lee, Jongjun; Oh, Kyeong-Seok; Kim, Dokyung; Kim, Taeryeol; Yang, Wonseok; Han, Sun-Phil; Lee, Tae Woong; Lim, Jaejin; Kim, Hong-, I; Kang, Minsang; Choi, Seungyeop; Kim, Seung-Hyeok; Kwak, Rhokyun; Lee, Young Joo; Lee, Won Bo; Lee, Yong Min; Lee, Sang-Young Abstract: Solid-state batteries (SSBs) promise higher energy density and improved safety, but interparticle voids and unstable solid-solid interfaces still limit their performance. Here, we translate the concept of lubrication into an electrolyte-lubrication strategy for SSBs. We design a solvation-tailored electrolyte lubricant, termed ACE (aggregate cluster electrolyte), in which spatially structured ion-pair clusters direct interphase formation. In ACE, molecular-orbital reconfiguration within Li+-anion clusters favors the growth of a thin, electronically insulating, inorganic-rich solid-liquid electrolyte interphase (SLEI) on sulfide electrolytes, mitigating their intrinsic instability. The fluid ACE infiltrates interparticle voids, forming percolating Li+-conduction networks and facilitating dynamic reconstruction of the solid-electrolyte interphase during cycling. These attributes enable stable Li-metal cycling at reduced external pressure and enhance cathode active-material utilization. Electrochemical-thermal simulations further show that ACE homogenizes ionic fluxes and thermal gradients at the cell scale. Electrolyte lubrication thus emerges as a scalable interfacial-engineering approach for making sulfide-based SSBs operate under more practical conditions. 2026-08-31T15:00:00Z https://scholar.dgist.ac.kr/handle/20.500.11750/60909 Title: 다공성 프레임 기반 박막형 고체 전해질막 조성물 및 그 제조방법 그리고 이를 적용한 전고체 전지 Author(s): 강석훈; 송지훈; 노영준; 조국영; 하회진; 이영기; 이용민; 김도환 https://scholar.dgist.ac.kr/handle/20.500.11750/60576 Title: 전고체 이차전지 Author(s): 박주남; 신동옥; 이용민; 이명주; 김주영; 이영기; 김주미; 김광만; 오지민; 강석훈 Abstract: The present disclosure relates to an all-solid-state secondary battery, and more particularly, to an all-solid-state secondary battery including a positive electrode, a negative electrode, and a solid electrolyte layer disposed between the positive electrode and the negative electrode. Here, at least one of the positive electrode and the negative electrode includes a sulfide-based active material, the sulfide-based active material has a particle size of about 50 nm to about 5 µm, and the sulfide-based active material has a grain size of about 1 nm to about 10 nm.