Abstract: A composite solid electrolyte, a method of preparing a composite solid electrolyte, and a solid secondary battery including the composite solid electrolyte. The composite solid electrolyte includes a sulfide-containing solid electrolyte, a binder, and a filler composite, where the filler composite includes an organic fibrous filler and a metal oxide located on a surface of the organic fibrous filler.

Abstract: A metal-air battery includes a unit battery cell and a weight sensor. The unit battery cell, which includes anolyte, a supporter, an anode being suspended from the supporter, and a cathode, is configured to generate electricity by using an oxygen reduction reaction in the cathode and an oxidation reaction of the anode. The weight sensor is configured to determine a weight of the anode of the unit battery cell. A metal-air battery system includes a metal-air battery and a controller configured to generate, based on a result of sensing by the weight sensor, a maintenance signal for the anode.

Abstract: Provided are a metal-air battery, a power supply including the same, and a method of manufacturing a metal-air battery, wherein the metal-air battery includes a cathode configured to use oxygen as an active material, an anode including an anode current collector and an aluminum metal extending in a first direction from a first end adjacent to the anode current collector to a second end opposite the first end, and an electrolyte between the cathode and the anode, wherein a distance between the cathode and the aluminum metal decreases in the first direction.

Abstract: A metal-air battery cell capable of generating constant output power. The metal-air battery cell may include a metal anode including an end and a lateral surface extending from the end, a cathode surrounding and spaced apart from the lateral surface of the metal anode, an electrolyte between the metal anode and the cathode and in contact with the end of the metal anode and a portion of the lateral surface of the metal anode, and an anode injector configured to move the metal anode to increase an area of the lateral surface of the metal anode contacting the electrolyte.

Abstract: A composition for forming a cathode active material layer, a solid-state battery and a method of preparing the solid-state battery, the solid-state battery including a cathode, an anode current collector, and a solid electrolyte layer disposed between the cathode and the anode current collector, wherein at least one of the cathode and the solid electrolyte layer includes a sulfide-based solid electrolyte, and at least one of a solvent or a decomposition product of the solvent, the solvent including a C1-C20 alkane compound containing one or more halogen atoms.

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.