US 12,230,783 B2
Use of perforated electrodes in silicon-dominant anode cells
Younes Ansari, Irvine, CA (US); Ambica Nair, Irvine, CA (US); and Benjamin Park, Mission Viejo, CA (US)
Assigned to Enevate Corporation, Irvine, CA (US)
Filed by Enevate Corporation, Irvine, CA (US)
Filed on Nov. 7, 2019, as Appl. No. 16/676,813.
Prior Publication US 2021/0143399 A1, May 13, 2021
Int. Cl. H01M 4/134 (2010.01); H01M 4/36 (2006.01); H01M 4/38 (2006.01); H01M 4/74 (2006.01); H01M 10/0525 (2010.01); H01M 10/0585 (2010.01)
CPC H01M 4/134 (2013.01) [H01M 4/366 (2013.01); H01M 4/386 (2013.01); H01M 4/742 (2013.01); H01M 10/0525 (2013.01); H01M 10/0585 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A battery, the battery comprising:
a cathode, an electrolyte, and an anode, the anode comprising active material on a current collector and the cathode comprising first and second current collectors, wherein:
the current collector of the anode and/or the first and second current collector of the cathode are perforated;
the cathode comprises a first active material layer on a first surface of each of the first and second current collectors and a second active material layer on a second surface of the first and second current collectors,
wherein the first active material layer comprises a first type of active material and the second active material layer comprises a second type of active material,
wherein the first and second types of active material includes one or more of lithium cobalt oxide (LCO), lithium iron phosphate, lithium nickel cobalt manganese oxide (NMC), lithium nickel cobalt aluminum oxide (NCA), lithium manganese oxide (LMO), or lithium nickel manganese spinel;
the first active material layer on the first surface of the first current collector and the first active material layer on the first surface of the second current collector are adjacent to each other; and
the first active material layer has a different amount of material per area as the second active material layer, such that the first active material layer is a source of lithiation for prelithiation of silicon-dominant anodes of the battery and the second active material layer is for lithium cycling of the battery, wherein lithium from the first active material layer travels through perforations of the first and second current collector of the cathode during prelithiation,
wherein the cathode is arranged as a top or bottom electrode of a stack of anodes and cathodes, the second active material layer on the second surface of the first and second current collectors being an outermost surface of the cathode opposite the anode.