Solid state catholytes and electrolytes for energy storage devices

Patent metadata

Field	Value
Publication number	US-2017149065-A1
Application number	US-201715404179-A
Country	US
Kind code	A1
Filing date	Jan 11, 2017
Priority date	May 15, 2013
Publication date	May 25, 2017
Grant date	—

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 Li a MP b S c (LMPS) [M=Si, Ge, and/or Sn] containing material.

First claim

1 - 24 . (canceled)

25 . A method of making a catholyte material, comprising
providing catholyte precursor materials; ball milling the precursor materials; annealing the precursor materials to form a catholyte; ball milling the catholyte.

26 . The method of claim 26 , wherein the catholyte precursor materials are selected from Li 2 S, P 2 S 5 , SiS 2 , or combinations thereof.

27 . The method of claim 26 wherein the catholyte precursor materials are selected from Li 2 S, P 2 S 5 , Si, and S.

28 . The method of claim 26 , wherein the annealing is at 500° C. to 600° C.

29 . The method of claim 26 , wherein the annealing is at 400° C. to 600° C.

30 . The method of claim 26 , wherein the ball milling the catholyte comprising ball milling to a median particle size of less than about 1 μm.

Assignees

• Quantumscape Corp

Inventors

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

Classifications

• C04B2235/3203

  Lithium oxide or oxide-forming salts thereof · CPC title

• C04B35/6262

  of calcined, sintered clinker or ceramics · CPC title

• C04B35/6261

  Milling · CPC title

• C04B2235/446

  Sulfides, tellurides or selenides · CPC title

• C04B35/62645

  Thermal treatment of powders or mixtures thereof other than sintering · CPC title