US 12,294,052 B2
Method for reduced interfacial impedance in a solid-state battery cell
Xingcheng Xiao, Troy, MI (US)
Assigned to GM Global Technology Operations LLC, Detroit, MI (US)
Filed by GM GLOBAL TECHNOLOGY OPERATIONS LLC, Detroit, MI (US)
Filed on Jan. 24, 2023, as Appl. No. 18/158,719.
Prior Publication US 2024/0250289 A1, Jul. 25, 2024
Int. Cl. H01M 10/0562 (2010.01); H01M 10/0585 (2010.01)
CPC H01M 10/0562 (2013.01) [H01M 10/0585 (2013.01); H01M 2220/20 (2013.01); H01M 2300/0077 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method to create a battery cell, comprising:
within a vacuum or an inert atmosphere, utilizing an etching process to remove a passivation layer from a primary surface of a solid electrolyte, wherein the solid electrolyte is constructed with lithium lanthanum zirconium oxide and the passivation layer includes lithium carbonate;
subsequently applying a surface coating to the primary surface with a slurry including an ionic conductive material and a solvent while the solid electrolyte is within the vacuum or the inert atmosphere; and
within the battery cell, disposing the solid electrolyte including the surface coating between an anode and a cathode.