Solid state catholyte or electrolyte for battery using Li
The present invention provides an energy storage device comprising a cathode region or other element. The device has a major active region comprising a plurality of first active regions spatially disposed within the cathode region. The major active region expands or contracts from a first volume to a second volume during a period of a charge and discharge. The device has a catholyte material spatially confined within a spatial region of the cathode region and spatially disposed within spatial regions not occupied by the first active regions. In an example, the catholyte material comprises a lithium, germanium, phosphorous, and sulfur (“LGPS”) containing material configured in a polycrystalline state. The device has an oxygen species configured within the LGPS containing material, the oxygen species having a ratio to the sulfur species of 1:2 and less to form a LGPSO material. The device has a protective material formed overlying exposed regions of the cathode material to substantially maintain the sulfur species within the catholyte material. Also included is a novel dopant configuration of the Li a MP b S c (LMPS) [M=Si,Ge, and/or Sn] containing material.
1. An electrolyte comprising Li a SiSnP b S c O d , wherein 2≤a≤10, 0.5≤b≤2.5, 4≤c≤12, and 0≤d≤3.4, and wherein the electrolyte is characterized by primary CuKαXRD peaks at 2θ=30°±1°, 2θ=33°±1°, and 2θ=43°±1°.
2. The electrolyte of claim 1 , wherein the electrolyte is Li 10 SiSnP 2 S 4 O d .
3. The electrolyte of claim 1 , wherein the ratio of 0:S is 1:10 or less.
4. The electrolyte of claim 1 , wherein the electrolyte has a room temperature ionic conductivity ranging from 10 −5 to 5×10 −2 S/cm and an electrical conductivity less than 10 −5 S/cm.
5. The electrolyte of claim 1 , wherein the electrolyte has a room temperature ionic conductivity ranging from 10 −4 to 10 −2 S/cm.
6. The electrolyte of claim 1 , wherein the electrolyte has a room temperature ionic conductivity ranging from 10 −5 S/cm to 10 −2 S/cm; and an electrical conductivity less than 10 −5 S/cm.
7. The electrolyte of claim 1 , wherein the electrolyte is doped with a dopant and characterized by XRD peaks including 18-21°, 26-28°, 28-31°, 40-42°, and 46-48°.
8. The electrolyte of claim 1 , wherein the electrolyte is characterized by at least one 7 Li NMR peak shift ranging from 0.5-1.5 ppm.
9. The electrolyte of claim 1 , wherein the electrolyte is characterized by at least one 31 P NMR peak shifts ranging from 86-88 ppm, 92-94 ppm, 73-78 ppm, or 108-109.5 ppm.