A new ultrafast superionic Li-conductor: ion dynamics in Li 11 Si 2 PS 12 and comparison with other tetragonal LGPS-type electrolytes
Year: 2014
Type: article
Abstract: We report on a new ultrafast solid electrolyte of the composition Li11Si2PS12, which exhibits a higher room-temperature Li ion diffusivity than the present record holder Li10GeP2S12. We discuss the high-pressure synthesis and ion dynamics of tetragonal Li11Si2PS12, and comparison is made with our investigations of related members of the LMePS family, i.e. electrolytes of the general formula Li11-xMe2-xP1+xS12 with Me = Ge, Sn : Li10GeP2S12, Li7GePS8, Li10SnP2S12. The structure and dynamics were studied with multiple complementary techniques and the macroscopic diffusion could be traced back to fast Li ion hopping in the crystalline lattice. A clear correlation between the diffusivity and the unit cell volume of the LGPS-type electrolytes was observed.
DOI: 10.1039/c4cp02046d
Authors: Alexander Kuhn, Oliver Gerbig, Changbao Zhu, Frank Falkenberg, Joachim Maier, Bettina V. Lotsch
Language: English
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: hybrid
OpenAlex ID: W2040581391