Interface Amorphization ─ Driven Fracture Toughness Improvement and Charge Redistribution for Dendrite Suppression

• DOI: 10.1021/acsami.5c00248
• Publication Date: 2025-05-22T18:04:43Z
• Authors: Yiwei You; Dexin Zhang; Yan Liu; Xinrui Cao; Tie-Yu Lü; Yang Sun; Zi-Zhong Zhu; Shunqing Wu
• Keywords: Redistribution; Interface (matter); Dendrite (mathematics)

All-solid-state batteries offer improved safety and energy density for vehicle electrification. Among various solid-state electrolytes, cubic garnet-type ceramic Li7La3Zr2O12 (LLZO) stands out due to its superior room-temperature ionic conductivity chemical stability. However, challenges such as lithium dendrite formation persist, particularly along the interface grain boundaries in LLZO. This study illustrates a method enhance stability of all-solid-state by interfacial amorphization. Through computational modeling, we demonstrate that amorphous regions exhibit lower electron capture ability compared interfaces, effectively suppressing growth. In addition, with structure, structure without exhibits excellent mechanical properties, higher requirements fracture, enhancing resistance crack propagation during charging/discharging cycles. summary, established model from micro mesoscopic scales, illustrating amorphization can stability, which provides insights into issues metal batteries.