Hikima Kazuhiro, Huy Phuc Nguyen Huu, Tsukasaki Hirofumi, Mori Shigeo, Muto Hiroyuki, Matsuda Atsunori
Department of Electrical and Electronic Information Engineering, Toyohashi University of Technology 1-1 Hibarigaoka, Tempaku Toyohashi Aichi 441-8580 Japan
Department of Materials Science, Graduate School of Engineering, Osaka Prefecture University 1-1, Gakuen-cho, Naka-ku, Sakai Osaka 599-8531 Japan.
RSC Adv. 2020 Jun 10;10(38):22304-22310. doi: 10.1039/d0ra02545c.
The performances of next generation all-solid-state batteries might be improved by using multi-valent cation doped LiPSCl solid electrolytes. This study provided solid electrolytes at room temperature using planetary ball milling without heat treatment. LiPSCl was doped with a variety of multivalent cations, where an electrolyte comprising 98% LiPSCl with 2% YCl doping exhibited an ionic conductivity (13 mS cm) five times higher than pure LiPSCl (2.6 mS cm) at 50 °C. However, this difference in ionic conductivity at room temperature was slight. No peak shifts were observed, including in the synchrotron XRD measurements, and the electron diffraction patterns of the nano-crystallites ( 10-30 nm) detected using TEM exhibited neither peak shifts nor new peaks. The doping element remained at the grain boundary, likely lowering the grain boundary resistance. These results are expected to offer insights for the development of other lithium-ion conductors for use in all-solid-state batteries.
使用多价阳离子掺杂的LiPSCl固体电解质可能会提高下一代全固态电池的性能。本研究通过行星球磨在无需热处理的情况下制备了室温下的固体电解质。LiPSCl掺杂了多种多价阳离子，其中一种包含98% LiPSCl和2% YCl掺杂的电解质在50°C时的离子电导率（13 mS/cm）比纯LiPSCl（2.6 mS/cm）高五倍。然而，室温下这种离子电导率的差异很小。包括在同步加速器XRD测量中未观察到峰位移动，并且使用TEM检测到的纳米微晶（10 - 30 nm）的电子衍射图案既没有峰位移动也没有新峰出现。掺杂元素保留在晶界处，可能降低了晶界电阻。这些结果有望为开发用于全固态电池的其他锂离子导体提供见解。
