SOLID STATE CATHOLYTES AND ELECTROLYTES FOR ENERGY STORAGE DEVICES

摘要

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. 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.

主权项

1. An energy storage device comprising a cathode region, the cathode region comprising:
an active material region comprising an active material that expands or contracts from a first volume to a second volume during a period of charge and discharge; a catholyte material spatially confined in spatial regions not occupied by the active material region, wherein the catholyte material comprises:
a lithium element from greater than 30 to 50 atomic % of the catholyte material;a silicon element from greater than 0 to 10 atomic % of the catholyte material,a tin element from greater than 0 to 10 atomic % of the catholyte;a phosphorous element from greater than 5 to 17 atomic % of the catholyte material;a sulfur element from greater than 35 to 60 atomic % of the catholyte material; andan oxygen element from greater than 0 to 15 atomic % of the catholyte material,wherein the Si/(Si+Sn) stoichiometry is from 0.3 to 0.6; andwherein the catholyte material is characterized by a primary CuKα XRD peak at 2θ=30°±1°, 2θ=33°±1°, or 2θ=43°±1°, andwherein the oxygen element has a ratio to the sulfur element of 1:2 or less forming a material; and optionally, a protective material overlaying exposed regions of the active material to substantially maintain the sulfur element within the catholyte material.