	US 12,444,729 B2
	Preparation of LI and NA foils with {110} or {100} surface texturing
Quan Li, Hong Kong (CN); and Xitao Hu, Shanxi (CN)
Assigned to The Chinese University of Hong Kong, Hong Kong (CN)
Filed by The Chinese University of Hong Kong, Hong Kong (CN)
Filed on Jan. 3, 2023, as Appl. No. 18/149,378.
Claims priority of provisional application 63/299,896, filed on Jan. 14, 2022.
Prior Publication US 2023/0231105 A1, Jul. 20, 2023
Int. Cl. H01M 4/04 (2006.01); B21B 1/40 (2006.01); B21D 33/00 (2006.01); H01M 4/38 (2006.01)

CPC H01M 4/0471 (2013.01) [B21B 1/40 (2013.01); B21D 33/00 (2013.01); H01M 4/0435 (2013.01); H01M 4/381 (2013.01); Y10T 29/30 (2015.01)]

7 Claims

1. A method of forming an alkali metal electrode consisting essentially of a {110} surface texturing, comprising:

providing an alkali metal foil;

first annealing the alkali metal foil at a first temperature of about 70 to 90 percent of a melting point of the alkali metal foil for 1 to 3 hours;

optionally first cooling the alkali metal foil to room temperature, wherein the alkali metal foil has a randomized surface crystallographic orientation;

washing the chemical polishing solution with a solvent for the chemical polishing solution;

first rolling the alkali metal foil to about 300 μm at room temperature;

scraping a surface layer of about 50 μm in thickness from the alkali metal foil at a temperature of about 70 to about 90 percent of the melting point of the alkali metal foil, wherein scraping is along a same axis as the first rolling;

second annealing the alkali metal foil at a second annealing temperature of about 70 percent of the melting point of the alkali metal foil for about 0.5 hours;

second rolling the alkali metal foil at the second annealing temperature to about 200 μm in thickness;

optionally second cooling the alkali metal foil to room temperature; and

cutting the alkali metal foil to a shape of an electrode, wherein the alkali metal electrode consists essentially of a {110} surface texturing.