US 12,125,975 B2
Phase-change electrolyte separator for a solid-state battery
Ken Ogata, Kanagawa (JP); Yang Yang, Kanagawa (JP); Hajime Hoshi, Kanagawa (JP); Masatsugu Nakano, Kanagawa (JP); and Hiroshi Imoto, Kanagawa (JP)
Assigned to TeraWatt Technology Inc., Santa Clara, CA (US)
Filed by TeraWatt Technology Inc., Santa Clara, CA (US)
Filed on Jul. 29, 2019, as Appl. No. 16/524,684.
Prior Publication US 2021/0036363 A1, Feb. 4, 2021
Int. Cl. H01M 10/0565 (2010.01); H01M 10/0567 (2010.01); H01M 10/0568 (2010.01); H01M 50/411 (2021.01); H01M 50/449 (2021.01)
CPC H01M 10/0565 (2013.01) [H01M 10/0567 (2013.01); H01M 10/0568 (2013.01); H01M 50/411 (2021.01); H01M 50/449 (2021.01); H01M 2300/0025 (2013.01); H01M 2300/0085 (2013.01); H01M 2300/0091 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A phase-change electrolyte for a solid state battery (SSB), the phase-change electrolyte comprising:
a phase-change electrolyte separator layer, comprising:
a non-reactive scaffold, wherein a physical structure of the non-reactive scaffold creates spaces within the non-reactive scaffold;
a lithium gel, wherein the lithium gel is formed from a liquid electrolyte mixture filled within the spaces and comprises:
a cross-linked polymer of a polymer additive and a cross-linker additive;
a lithium salt; and
a solvent in which the lithium salt is dissolved, wherein:
the polymer additive comprises Poly(4-vinylpyridine) (P4VP); and
the cross-linker additive is selected from the group consisting of N,N,N′,N′-Tetra(trifluoromethanesulfonyl)-dodecane-1,12-diamine (C12TF SA), N,N,N′,N′-Tetra(trifluoromethanesulfonyl)-hexane-1,6-diamine (C6TFSA), and a combination thereof, the polymer additive and the cross linker additive are mixed into the lithium liquid;
a first adhesive layer and a second adhesive layer, wherein the first adhesive layer contacts the non-reactive scaffold on a first side and the second adhesive layer contacts the non-reactive scaffold on a second side;
an anti-dendrite layer that is in contact with either the first adhesive layer or the second adhesive layer; and
an interfacial bonding layer in direct contact with an anode current collector of the solid state battery (SSB), wherein the interfacial bonding layer:
is positioned between the anti-dendrite layer and the anode current collector;
comprises a conductive agent and a binder material, wherein the conductive agent comprises carbon, wherein the binder material comprises polyvinylidene fluoride (PvDF), styrene butadiene rubber and sodium methyl cellulose (SBR/CMC), or poly(acrylic acid) (PAA); and
is characterized by a density of between 0.1 g/cm3 and 2.0 g/cm3.