US 12,469,845 B2
Fast charging pre-lithiated silicon anode
Marina Yakovleva, Gastonia, NC (US); Kenneth Brian Fitch, Cherryville, NC (US); and Jian Xia, Belmont, NC (US)
Assigned to Livent USA Corp., Philadelphia, PA (US)
Filed by Livent USA Corp., Philadelphia, PA (US)
Filed on Jan. 24, 2024, as Appl. No. 18/421,255.
Application 18/421,255 is a continuation of application No. 17/178,439, filed on Feb. 18, 2021, granted, now 11,923,535.
Claims priority of provisional application 62/978,475, filed on Feb. 19, 2020.
Prior Publication US 2024/0178374 A1, May 30, 2024
Int. Cl. H01M 4/36 (2006.01); H01M 4/02 (2006.01); H01M 4/04 (2006.01); H01M 4/134 (2010.01); H01M 4/1395 (2010.01); H01M 4/38 (2006.01); H01M 4/62 (2006.01); H01M 10/0525 (2010.01); H01M 10/0562 (2010.01)
CPC H01M 4/366 (2013.01) [H01M 4/0404 (2013.01); H01M 4/134 (2013.01); H01M 4/1395 (2013.01); H01M 4/382 (2013.01); H01M 4/386 (2013.01); H01M 4/622 (2013.01); H01M 10/0525 (2013.01); H01M 10/0562 (2013.01); H01M 2004/021 (2013.01); H01M 2004/027 (2013.01); H01M 2300/0068 (2013.01)] 6 Claims
 
1. A battery comprising:
a cathode; and
an anode comprising a silicon active material having a first porosity of about 10 to 45 percent lithiated with a printable lithium composition comprised of a lithium metal powder, a polymer binder compatible with the lithium metal powder, a carbon-based rheology modifier compatible with the lithium metal powder, and a non-polar solvent compatible with the lithium metal powder and with the polymer binder; wherein on electrolyte addition the active material is alloyed or intercalated with lithium particles diffused from the printable lithium composition to form an anode having a second porosity increased from the first porosity by about 5% to about 15% when the silicon active material is alloyed or intercalated with lithium particles diffused from the printable lithium composition to form a three-dimensional porous framework within the anode and provides improved rate capability between about 20 to 50% at a 2C charge rate compared to a non-lithiated silicon anode.