Hikima Kazuhiro, Kusaba Ikuyo, Gamo Hirotada, Phuc Nguyen Huu Huy, Muto Hiroyuki, Matsuda Atsunori
Department of Electrical and Electronic Information Engineering, Toyohashi University of Technology, 1-1 Hibarigaoka, Tempaku, Toyohashi, Aichi 441-8580, Japan.
Institute of Liberal Arts and Sciences, Toyohashi University of Technology, 1-1 Hibarigaoka, Tempaku, Toyohashi, Aichi 441-8580, Japan.
ACS Omega. 2022 May 6;7(19):16561-16567. doi: 10.1021/acsomega.2c00546. eCollection 2022 May 17.
LiPS solid electrolytes (SEs) subjected to liquid-phase synthesis with CaS or CaI doping were investigated in terms of their ionic conductivity and stability toward lithium anodes. No peak shifts were observed in the XRD patterns of CaS- or CaI-doped LiPS, indicating that the doping element remained at the grain boundary. CaS- or CaI-doped LiPS showed no internal short circuit, and the cycling continued, indicating that not only CaI including I but also CaS could help increase the lithium stability. These results provide insights for the development of sulfide SEs for use in all-solid-state batteries in terms of their ionic conductivity and stability toward lithium anodes.
对通过液相合成法制备的、掺杂有CaS或CaI的锂硫固体电解质（SEs）的离子电导率以及对锂负极的稳定性进行了研究。在掺杂CaS或CaI的锂硫的X射线衍射（XRD）图谱中未观察到峰位移动，这表明掺杂元素保留在晶界处。掺杂CaS或CaI的锂硫未出现内部短路情况，并且循环得以持续，这表明不仅含I的CaI，而且CaS也有助于提高锂稳定性。这些结果为全固态电池中硫化物固体电解质在离子电导率和对锂负极稳定性方面的发展提供了见解。
