Lithium ion conductive sulfide-based solid electrolyte and all-solid lithium battery using same
A solid electrolyte including a lithium (Li) element, a phosphorus (P) element and a sulfur (S) element, the 31 P MAS NMR spectrum thereof having a peak ascribed to a crystal at 90.9±0.4 ppm and 86.5±0.4 ppm; and the ratio (x c ) of the crystal in the solid electrolyte being from 60 mol % to 100 mol %.
1. A solid electrolyte comprising a lithium (Li) element, a phosphorus (P) element and a sulfur (S) element,
a 31 P Magic Angle Spinning (MAS) NMR spectrum thereof having a peak corresponding to a highly ion conductive crystal at 90.9±0.4 ppm and 86.5±0.4 ppm; and
a ratio (x c ) of the highly ion conductive crystal in the solid electrolyte is from 60 mol % to 100 mol %.
2. The solid electrolyte according to claim 1 which has a spin-lattice relaxation time T 1Li <500 ms at room temperature (25° C.) measured by the solid-state 7 Li NMR spectroscopy.
3. An all-solid lithium battery comprising the solid electrolyte according to claim 2 .
4. The solid electrode according to claim 1 , wherein x c is from 65 mol % to 100 mol %.
5. The solid electrode according to claim 2 , wherein T 1Li ; is 350 ms or less at room temperature (25° C.).