US 12,406,997 B2
Anode-free solid state battery having a pseudo-solid lithium gel layer
Ken Ogata, Kanagawa (JP); Yang Yang, Kanagawa (JP); Hajime Hoshi, Kanagawa (JP); Jungho Kim, Kanagawa (JP); Masatsugu Nakano, Kanagawa (JP); and Hiroshi Imoto, Kanagawa (JP)
Assigned to TeraWatt Technology Inc., Tokyo (JP)
Filed by TeraWatt Technology Inc., Santa Clara, CA (US)
Filed on Jul. 29, 2019, as Appl. No. 16/524,693.
Prior Publication US 2021/0036328 A1, Feb. 4, 2021
Int. Cl. H01M 4/62 (2006.01); H01M 10/0565 (2010.01); H01M 10/0585 (2010.01); H01M 50/46 (2021.01)
CPC H01M 4/628 (2013.01) [H01M 10/0565 (2013.01); H01M 10/0585 (2013.01); H01M 50/461 (2021.01); H01M 2300/0085 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An anti-dendrite anode-free solid-state battery, comprising:
a cathode layer comprising lithium ions;
an anode current collector layer comprising copper;
a lithium-gel separator layer between the cathode layer and the anode current collector layer, wherein the lithium-gel separator layer comprises:
a first adhesive layer;
a second adhesive layer; and
a lithium gel layer located between the first adhesive layer and the second adhesive layer, wherein the lithium-gel separator layer comprises:
a non-reactive scaffold having spaces within the non-reactive scaffold; and
a lithium gel formed from a liquid electrolyte filled in the spaces and comprising a salt, a solvent, and a cross-linked polymer of a polymer additive and a cross-linker additive; and
an anti-dendrite layer located between the lithium-gel separator layer and the anode current collector layer, wherein the anti-dendrite layer comprises one or more materials selected from the group consisting of: carbon black; acetylene black; ketchen black; silver; zinc; gold; bismuth; tin; polymide (PI); polyacrylic acid (PAA); and carboxymethyl cellulose styrene-butadiene rubber (CMC-SBR); and
an interfacial bonding layer deposited directly onto the anode current collector layer such that the interfacial bonding layer is in direct contact on a first side with the anode current collector layer, wherein the interfacial bonding layer consists of a conductive agent, metal particles, and a binder material, and wherein the binder material is selected from the group consisting of polyvinylidene fluoride (PvDF), styrene butadiene rubber and sodium carboxyl methyl cellulose (SBR/CMC), poly (acrylic acid) (PAA), and any combinations thereof, the conductive agent is selected from the group consisting of acetylene black, carbon black, and a combination thereof, the metal particles are selected from the group consisting of Bi particles, Sn particles, Ag particles, Au particles, Pt particles, and any combinations thereof, the interfacial bonding layer is free from lithium and encourages formation of lithium deposits between the interfacial bonding layer and the lithium deposits,
wherein a lithium metal layer plates between the anti-dendrite layer and the interfacial bonding layer when the anode-free solid-state battery is charging.