Liao, Yu-KaiYu-KaiLiaoRU-SHI LIUYao, Sung-TingSung-TingYaoHu, Shu-FenShu-FenHu2024-01-152024-01-152023-11-2819448244https://scholars.lib.ntu.edu.tw/handle/123456789/638487In recent years, the development of electric vehicles and environmental concerns have made necessary improvements in the energy density and safety of lithium-ion batteries. Therefore, the development of all-solid-state lithium-ion batteries (ASSLIBs) has become imperative. One advantage of ASSLIBs is their potential for downsizing with the use of lithium metal as the anode. However, in this study, a garnet-type solid electrolyte (Li6.75La3Zr1.75Ta0.25O12) was used, which has low reactivity with lithium metal. Thus, interface modification using CaCl2 was employed to form a Li-Ca-Cl composite anode. The interfacial resistance was remarkably reduced to 7 Ω cm2, and the symmetric cell exhibited stable cycling for 1200 h at room temperature and a current density of 0.1 mA cm-2. The voltage ranged from ±15 to ±16 mV. The full cell demonstrated a high initial discharge capacity of 149.2 mA h g-1 and a Coulombic efficiency of 98.0% while maintaining a discharge capacity retention of 91.3% after 100 cycles. These findings lay a solid foundation for future commercial applications as interface modification was achieved through a simple spin-coating process using low-cost CaCl2 (0.7 USD g-1).enLi–Ca–Cl; garnet; in situ; lithiumphilic; low-cost; solid-state Li metal batteryjournal article10.1021/acsami.3c13222380161082-s2.0-85179609310https://api.elsevier.com/content/abstract/scopus_id/85179609310