| Author(s) |
Taeseup Song, Ungyu Paik, Seungcheol Myeong, Jiwoon Kim, Insung Hwang, Minsung Kim, Ganggyu Lee, Myeungwoo Ryu, Joonhyeok Park, Jooheon Sun, Seungmin Han, Geunsu Kim, Woojin Jeong, Sumin Hong, Giha Lee, Jinwoo Jeong, Yeseung Lee, Jun Lim, Sejin Park, Seoyun Jeong, Bogeum Choi, Se-On Sa, Yeongsung Yun |
| Abstract Scope |
All-solid-state batteries (ASSBs) are promising next-generation energy storage systems owing to their superior safety and energy density. Among various solid electrolytes (SEs), sulfide-based argyrodites such as Li₆PS₅Cl (LPSCl) offer high ionic conductivity and mechanical properties but suffer from poor air stability due to moisture-induced side reactions and an unstable interface between the SEs and electrodes. In this study, we propose the interface engineering approach to address both the environmental instability of SEs and the interfacial limitations of cathode composites. A fluoride-rich LPSCl shell was formed via a simple fluorination and annealing process, significantly enhancing the moisture resistance while maintaining favorable electrochemical characteristics. Furthermore, Cathode particles were conformally coated with LPSCl using a mechano-fusion method to ensure homogeneous SE distribution and intimate contact at the cathode interface. This synergistic strategy effectively mitigates interfacial degradation and facilitates stable ion transport, offering a practical route toward scalable and high-performance ASSBs. |