Solid state catholyte or electrolyte for battery using LiaMPbSc (M=Si, Ge, and/or Sn)

Patent metadata

Field	Value
Publication number	US-11139479-B2
Application number	US-201916672333-A
Country	US
Kind code	B2
Filing date	Nov 1, 2019
Priority date	May 15, 2013
Publication date	Oct 5, 2021
Grant date	Oct 5, 2021

Abstract

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 LiaMPbSc (LMPS) [M=Si,Ge, and/or Sn] containing material.

First claim

What is claimed:

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.

Assignees

• Quantumscape Battery Inc

Inventors

• Chao Cheng-Chieh
• Chen Zhebo
• Holme Tim
• Mayer Marie A
• Riley Jr Gilbert N

Classifications

• H01M2300/0071

  Oxides · CPC title

• H01M4/366

  as layered products · CPC title

• C04B2235/447

  Phosphates or phosphites, e.g. orthophosphate or hypophosphite · CPC title

• C04B2235/446

  Sulfides, tellurides or selenides · CPC title

• C04B2235/428

  Silicon · CPC title