Abstract: A cathode for an all-solid secondary battery, an all-solid secondary battery including the cathode, and a method of preparing an all-solid secondary battery. The cathode includes a cathode current collector and a cathode active material layer containing a solid electrolyte, on the cathode current collector, where the cathode current collector includes a first surface adjacent to the cathode active material layer, and a second surface opposing the first surface, and the second surface of the cathode current collector has a highest surface roughness value of 1.5 micrometers or more.

Abstract: A cathode slurry composition, a lithium secondary battery including a cathode derived cathode slurry composition, and a method of manufacturing the cathode slurry composition. The cathode slurry composition includes a non-polar solvent, a sulfide-containing solid electrolyte, a cathode active material including a lithium transition metal oxide, and a binder, wherein the binder includes at least two of an ethylene-based monomer-derived repeating unit a, a propylene-based monomer-derived repeating unit b, or a diene-based monomer-derived repeating unit c.

Abstract: A solid battery, and a method of preparing an solid battery. The solid battery includes: a cathode; an anode; and a solid electrolyte layer between the cathode and the anode. The solid electrolyte layer comprises one or a plurality of sub-solid electrolyte layers. The solid electrolyte layer comprises an interlayer between the plurality of sub-solid electrolyte layers or does not comprise the interlayer. At least one of the sub-solid electrolyte layer or the interlayer, if present, comprises a tackifier. The tackifier comprises a hydrocarbonaceous oligomer derived from an aliphatic chain monomer having 5 carbon atoms to 20 carbon atoms, an aromatic ring monomer having 6 carbon atoms to 20 carbon atoms, an aliphatic ring monomer having 5 carbon atoms to 20 carbon atoms, or a combination thereof.

Abstract: A metal-air battery including a positive electrode layer that includes a lithium-ion conductive solid electrolyte membrane and a porous electroconductive metal oxide represented by Formula 1, wherein the electroconductive metal oxide has a specific surface area of about 0.01 m2/g to about 1000 m2/g, LxRuyOx??Formula 1 wherein, in Formula 1, L is at least one of a lanthanide element or an actinide element, and 0<x<1, 0<y<1, and 0<z?1. a negative electrode layer, and an electrolyte disposed between the positive electrode layer and the negative electrode layer.

Abstract: A solid electrolyte includes: a first electrolyte layer including an inorganic lithium ion conductor; and a second electrolyte layer disposed on at least one side of the first electrolyte layer and including a compound represented by Formula 1 Li1?3x+4y(HfaM1?a)2?y(PO4?xQx)3??Formula 1 wherein in Formula 1, M is at least one of a monovalent to a hexavalent element, wherein 0<a?1, 0?x<?, and 0?y<2, and Q is F, Cl, Br, I, a pseudohalogen, or a combination thereof.

Abstract: A solid electrolyte membrane includes a solid electrolyte, a high-molecular-weight polymer binder having a weight average molecular weight of about greater than 75,000 gram/mole (g/mol) but less than or equal to 1,000,000 g/mol, and a low-molecular-weight non-polar liquid rubber (non-polar elastomer), wherein the low-molecular-weight non-polar liquid rubber has a weight average molecular weight of about 2,000 g/mol to about 75,000 g/mol, and a viscosity of about 1 centipoises (cps) to about 100,000 cps. An all-solid-state secondary battery includes the solid electrolyte membrane.

Abstract: A gas diffusion layer for a metal-air battery, the gas diffusion layer including: a porous layer including non-conductive fiber structures, a conductive carbon layer including a carbon material that is disposed on a surface of a non-conductive fiber structure of the plurality of non-conductive fiber structures.

Abstract: A solid electrolyte includes a sulfide solid electrolyte, a first binder, and a second binder, wherein the first binder and the second binder have a different energy of adhesion from each other with respect to the sulfide solid electrolyte, wherein the energy of adhesion of the first binder with respect to the sulfide solid electrolyte is less than ?300,000 kcal/mol and the energy of adhesion of the second binder with respect to the sulfide solid electrolyte is ?300,000 kcal/mol or more, wherein the energy of adhesion of the first binder with respect to the sulfide solid electrolyte has a greater absolute value than the energy of adhesion of the second binder. A solid-state secondary battery includes a cathode, an anode, and a solid electrolyte layer disposed therebetween, wherein at least one of the cathode, the anode, or the solid electrolyte layer includes the solid electrolyte.

Abstract: A cathode for an air battery includes a porous conductive material; and a base-resistant compound on a surface of the porous conductive material, the base-resistant compound having a 0 or positive Gibbs free energy at 2 V to 4.5 V vs Li/Li+ at a pH of about 7 to about 14.

Abstract: A solid electrolyte includes a sulfide solid electrolyte, a first binder, and a second binder, wherein the first binder and the second binder have a different energy of adhesion from each other with respect to the sulfide solid electrolyte, wherein the energy of adhesion of the first binder with respect to the sulfide solid electrolyte is less than ?300,000 kcal/mol and the energy of adhesion of the second binder with respect to the sulfide solid electrolyte is ?300,000 kcal/mol or more, wherein the energy of adhesion of the first binder with respect to the sulfide solid electrolyte has a greater absolute value than the energy of adhesion of the second binder. A solid-state secondary battery includes a cathode, an anode, and a solid electrolyte layer disposed therebetween, wherein at least one of the cathode, the anode, or the solid electrolyte layer includes the solid electrolyte.

Abstract: A solvent for preparing a solid electrolyte layer, wherein the solvent has a vapor pressure of about 26.66 Pascal to about 600 Pascal at 25° C., and wherein the solvent satisfies Equation 1: ?2=(?D)2+(?P)2+(?H)2??Equation 1 wherein ? is a Hansen solubility parameter, and ? is about 16.4 MPa1/2 to about 18.2 MPa1/2, ?D is a dispersion energy parameter, and ?D is about 15 MPa1/2 to about 18.2 MPa1/2, ?P is a polar-dipolar energy parameter, and ?P is about 0 MPa1/2 to about 4 MPa1/2, and ?H is a hydrogen bonding energy parameter, and ?H is about 0 MPa1/2 to about 6 MPa1/2.

Abstract: A cathode for a metal-air battery, the cathode including a mixed conductor; and first pores having a size of about 1 micrometer (?m) or greater, wherein an amount of the first pores is about 30 volume percent (volume %) or greater, with respect to a total volume of pores in the cathode, and a total porosity of the cathode is about 50% or greater, based on a total volume of the cathode.

Abstract: A cathode configured to use oxygen as a cathode active material includes: a porous film including a metal oxide, where a porosity of the porous film is about 50 volume percent to about 95 volume percent, based on a total volume of the porous film, and an amount of an organic component in the porous film is 0 to about 2 weight percent, based on a total weight of the porous film.

Abstract: A metal-air battery includes: a cell module configured to generate electricity by oxidation of a metal and reduction of oxygen and water; a water vapor supply unit configured to supply a first water vapor to the cell module; a moisture storage unit configured to supply a first moisture at a first flow rate to the water vapor supply unit; and a condensing unit configured to supply a second moisture at a second flow rate to the water vapor supply unit by condensing the water vapor condensed from the cell module.

Abstract: A solid electrolyte-cathode assembly including a plurality of cathode layers spaced apart from each other in a first direction, and an electrolyte layer including an amorphous solid electrolyte and a crystalline solid electrolyte including a plurality of crystalline solid electrolyte particles, wherein the amorphous solid electrolyte is on a surface of a cathode layer of the plurality of cathode layers and the crystalline solid electrolyte is within the amorphous solid electrolyte.

Abstract: A solid electrolyte includes: a first electrolyte layer including an inorganic lithium ion conductor; and a second electrolyte layer disposed on at least one side of the first electrolyte layer and including a compound represented by Formula 1 Li1?3x+4y(HfaM1?a)2?y(PO4?xQx)3 ??Formula 1 wherein in Formula 1, M is at least one of a monovalent to a hexavalent element, wherein 0<a?1, 0?x<1/3, and 0?y<2, and Q is F, Cl, Br, I, a pseudohalogen, or a combination thereof.

Abstract: A cathode configured to use oxygen as a cathode active material, the cathode including: a porous film, wherein the porous film includes a metal oxide, and wherein a surface of the porous film has root mean square (RMS) roughness (Rq) of about 0.01 micrometer to about 1 micrometer, and a porosity of the porous film is about 50 volume percent to about 99 volume percent, based on a total volume of the porous film.

Abstract: A polymer compound including a repeating unit represented by Formula: wherein R1, R2, R3, R4, a1, a2, and a11 in Formula 1 are as defined in the specification.

Abstract: A cathode configured to use oxygen as a cathode active material includes: a porous electrically conductive framework substrate; and a coating layer disposed on a surface of the porous electrically conductive framework substrate, wherein the coating layer includes at least one of a lithium-containing metal oxide or a composite including a lithium-containing metal oxide, and wherein a porosity of the porous electrically conductive framework substrate is about 70 percent to about 99 percent, based on a total volume of the cathode, and an areal resistance of the porous electrically conductive framework substrate is about 0.01 milliohms per square centimeter to about 100 milliohms per square centimeter.

Abstract: A composite cathode including: a cathode conductor layer including a mixed conductor; and a cathode junction layer adjacent to the cathode conductor layer, the cathode junction layer including a solid electrolyte, wherein the mixed conductor has a lithium-ion conductivity and an electrical conductivity, and wherein the solid electrolyte has a lithium-ion conductivity. In addition, the present disclosure provides a lithium-air battery including the composite cathode.