Rivian IP Holdings, LLC

Rubayyat Mahbub

Forrest Stephen Gittleson

Soo Kim

Terri Chai Lin

Chen Chen

Woochul Shin

Sun Ung Kim

Karthik Bhatt

Thomas Andrew Wynn

Sonika Rajput

Hui Dong

Muratahan Aykol

Shyam Dwaraknath

An electrochemical cell includes a solid-state electrolyte, an anode, and an interfacial layer between the solid-state electrolyte and the anode, wherein the interfacial layer includes a lithium metal sulfide.

Stable lithium metal sulfide coatings for solid-state batteries

Aspects of the disclosure relate to electrode active materials for use in battery cells that include a lithium metal phosphate core having a more ionically conductive layer thereon. The layer of the ionic conducting material advantageously can increase lithium ion conduction of the active material by at least one order of magnitude relative to the core material alone. As such, electrodes may be fabricated with lower areal densities resulting in battery cells that have such electrodes with higher charge rates and potentially smaller physical dimensions.

Fast-charge lithium metal phosphate materials

Aspects of the disclosure relate to solid state electrolytes which include a composition of LiPSCl having a dopant substituted, in part, for phosphorus (P-site dopant) and an excess molar amount of Cl (i.e., doped, off-stoichiometric compositions). The P-site dopant can be selected among Groups 4, 5, 14, or 15 of the periodic table of elements and has an ionic radius greater than phosphorus (P). Such solid state electrolytes can be used in all solid-state batteries and configured for use in electric vehicles.

Solid state electrolyte

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Rubayyat Mahbub