The new Li-Si-P ternary phase compounds Li8SiP4 and Li2SiP2 are the starting point of a large compound class. Both compounds form structures based on SiP4 tetrahedral building blocks and reveal a significant lithium ion mobility. The compounds were characterized by XRD and solid-state NMR, and Li ion mobility was investigated by impedance and temperature-dependent NMR spectroscopy.
Lithium Ion Mobility in Lithium Phosphidosilicates: Crystal Structure, 7Li, 29Si, and 31P MAS NMR Spectroscopy, and Impedance Spectroscopy of Li8SiP4 and Li2SiP2
L. Toffoletti, H. Kirchhain, J. Landesfeind, W. Klein, L. van Wüllen, H. A. Gasteiger, T. F. Fässler, Chem. Eur. J. 2016 on-line (DOI: 10.1002/chem.201602903)