Lee, Yongheum Jeong, Jiwon Lee, Ho Jun Kim, Mingony Han, Daseul Kim, Hyoungchul Yuk, Jong Min Nam, Kyung-Wan Chung, Kyung Yoon Jung, Hun-Gi Yu, Seungho 2024-01-19T13:02:36Z 2024-01-19T13:02:36Z 2022-01-10 2022-01 2380-8195 https://pubs.kist.re.kr/handle/201004/115905 Solid electrolytes (SEs) are promising candidates for enhancing the energy density and safety of conventional lithium-ion batteries. Recently, lithium thioantimonate iodide argyrodites have been regarded as promising SEs because of their high ionic conductivities and air-stability. In this study, we utilized high-energy ball milling to synthesize Ge-substituted thioantimonate argyrodites and achieved an ionic conductivity of 16.1 mS cm(-1) for Li6.5Sb0.5Ge0.5S5I, which is the highest value among the reported cold-pressed SE pellets. First-principles calculations reveal that concerted Li-ion migrations through the inter-cage paths substantially improve the ionic conductivity. Li6.5Sb0.5Ge0.5S5I shows good compatibility with LiNi0.5Co0.2Mn0.3O2-based all-solid-state batteries (ASSBs) after applying Li3YCl6 as a catholyte, which exhibits a high discharge capacity of 164 mAh g(-1) and good cycle stability. Ge-substituted thioantimonate argyrodites exhibit excellent air-stability, which facilitates reducing the synthesis and fabrication costs of ASSBs with hygroscopic P-based sulfide SEs. The superionic conductors with high air-stability reported in this study demonstrate substantial promise for the development of ASSBs. English American Chemical Society Lithium Argyrodite Sulfide Electrolytes with High Ionic Conductivity and Air Stability for All-Solid-State Li-Ion Batteries Article 10.1021/acsenergylett.1c02428 1 ACS Energy Letters, v.7, no.1, pp.171 - 179 ACS Energy Letters 7 1 171 179 N scie scopus 000731034300001 2-s2.0-85121102170 Chemistry, Physical Electrochemistry Energy & Fuels Nanoscience & Nanotechnology Materials Science, Multidisciplinary Chemistry Electrochemistry Energy & Fuels Science & Technology - Other Topics Materials Science Article SUPERIONIC CONDUCTOR PERFORMANCE INTERPHASE CHEMISTRY VOLTAGE NA3SBS4 ANODE BR