https://scholars.lib.ntu.edu.tw/handle/123456789/625304
標題: | Reducing oxy-contaminations for enhanced Li-ion conductivity of halide-based solid electrolyte in water-mediated synthesis | 作者: | Liu H.-W Lin C.-C Chang P.-Y Haw S.-C Sheu H.-S Chen J.-M CHIA-CHIN CHEN Jeng R.-J NAE-LIH WU |
公開日期: | 2022 | 來源出版物: | Journal of Solid State Electrochemistry | 摘要: | Liquid-mediated synthesis offers a new approach to producing or applying solid electrolytes (SEs) in all-solid-state Li-ion batteries (ASSLIB). Li-ion conductive Li3InCl6 (LIC) powders are synthesized using a water-mediated process in which hydrated precursor powders are dried at progressively increasing temperatures up to 200 °C. The effects of drying environments, including high-vacuum (HV; 10−3 Torr), low-vacuum (LV; 10−1 Torr), Ar, and N2 (both at 1 atm), on the chemical, microstructural, and ionic conductive properties of the LIC powders are investigated. Oxy-contaminations in the LIC powders are determined based on synchrotron X-ray diffraction and X-ray absorption analyses. The ionic conductivity of the produced LIC powder exhibits a profound reverse trend with the amounts of oxy contaminations, including crystal water residual and In-O oxy species, such as InOCl. The vacuum drying conditions favor the formation of smaller particles, which facilitate water removal due to a shorter diffusion length and a higher surface area, resulting in less oxy-contamination and higher ionic conductivities (HV: 2.70 mS cm−1; LV: 0.96 mS cm−1). The 1-atm drying conditions, either in Ar or N2, produce compact LIC chunks, which are unfavorable to water removal, and more oxy-contaminations, leading to nearly an order of magnitude lower conductivities (Ar: 0.39 mS cm−1; N2: 0.22 mS cm−1). The HV SE powder leads to the best electrochemical performance of a high-capacity Ni-rich Li(Ni,Mn,Co)O2│SE│InLi full-cell. The revealed processing-microstructure-property relationships may facilitate the synthesis of high-quality halide-based Li-ion SEs for ASSLIB applications. © 2022, The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature. |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-85131504791&doi=10.1007%2fs10008-022-05213-y&partnerID=40&md5=e6a5871b3e9dbe65ec7ff899863192ed https://scholars.lib.ntu.edu.tw/handle/123456789/625304 |
ISSN: | 14328488 | DOI: | 10.1007/s10008-022-05213-y | SDG/關鍵字: | Cathodes; Chlorine compounds; Contamination; Drying; Ionic conductivity; Ions; Lithium compounds; Lithium-ion batteries; Powders; X ray absorption; All-solid state; Drying condition; High vacuum; Increasing temperatures; Li ion conductivities; Low vacuum; New approaches; Precursor powder; Synthesised; Water removal; Solid electrolytes |
顯示於: | 化學工程學系 |
在 IR 系統中的文件,除了特別指名其著作權條款之外,均受到著作權保護,並且保留所有的權利。