Abstract: A system and method of estimating the state of health of an all-solid-state battery are provided to detect the amount of hydrogen sulfide that is generated in all-solid-state battery cells and using the amount as a factor for estimating the state of health of the battery. The method of estimating a state of health (SOH) of an all-solid-state battery includes detecting whether hydrogen sulfide is generated in each cell of the all-solid-state battery, and estimating the state of health of the all-solid-state battery corresponding to an amount or an increase rate of generated hydrogen sulfide based on data prepared in advance.

Abstract: Disclosed are, inter alia, a sulfide solid electrolyte, a method of producing the same, and an all-solid-state battery including the same.

Abstract: A system and method of estimating the state of health of an all-solid-state battery are provided to detect the amount of hydrogen sulfide that is generated in all-solid-state battery cells and using the amount as a factor for estimating the state of health of the battery. The method of estimating a state of health (SOH) of an all-solid-state battery includes detecting whether hydrogen sulfide is generated in each cell of the all-solid-state battery, and estimating the state of health of the all-solid-state battery corresponding to an amount or an increase rate of generated hydrogen sulfide based on data prepared in advance.

Abstract: A method of manufacturing an all-solid-state battery includes forming an anode active material layer on surfaces of an anode current collector, forming a first solid electrolyte layer covering exposed surfaces of the anode active material layer to form a symmetrical electrode structure, pressing the structure at a preliminary pressing pressure lower to form an anode, forming a cathode active material layer on a surface of cathode current collectors, the cathode active material layer being smaller than the cathode current collectors, forming a second solid electrolyte layer covering the cathode active material layers and the cathode current collectors to form first and second cathodes, forming a laminate by laminating the cathodes on opposite surfaces of the anode, the second solid electrolyte layers of the cathodes facing the anode, and pressing the laminate at the final pressing pressure.

Abstract: A rechargeable lithium ion battery including a negative active material, the negative active material including a carbon-based active material, and an electrolyte solution that includes a S?O-containing compound, the S?O-containing compound having a structure that is selected according to a G band/D band ratio of the carbon-based active material.

Abstract: A rechargeable lithium battery includes: a positive electrode including a positive active material; and an electrolyte solution including a solvent and an additive, wherein the positive active material includes a lithium-containing transition metal oxide, the solvent includes a hydrofluoroether, and the additive includes a first additive represented by Chemical Formula 1 and at least one selected from a second additive represented by Chemical Formula 2, a third additive represented by Chemical Formula 3, and a fourth additive represented by Chemical Formula 4.

Abstract: A separation membrane-integrated electrode assembly for a lithium ion secondary battery comprising an electrode active material layer; and a separation membrane on the electrode active material layer, wherein the separation membrane comprises cellulose nanofibers and a polymer as a binder, and the polymer contains a reactive group that forms a hydrogen bond with the cellulose nanofibers, as well as a method of manufacturing the separation membrane-integrated electrode assembly, and a lithium ion secondary battery including the separation membrane-integrated electrode assembly.

Abstract: A separator including: a cellulose fiber nonwoven fabric; and a fluorine-containing resin layer including a fluorine-containing copolymer, the fluorine-containing resin layer being disposed on a surface of the cellulose fiber nonwoven fabric, wherein the fluorine-containing copolymer includes a copolymer including vinylidene fluoride and a fluorine-containing monomer other than vinylidene fluoride.

Abstract: Provided herein is a separator for a non-aqueous electrolyte secondary battery, the separator having a stacked structure including: a first layer including a polyolefin-based resin, the first layer being a porous film; a second layer including the polyolefin-based resin and a water-based polymer; and a third layer including a binder consisting of the polymer and cellulose nanofibers, and a method of making the same.

Abstract: A rechargeable lithium battery includes a negative electrode including a negative active material including a silicon-based material and a carbon-based material; and an electrolyte solution, wherein the negative electrode further includes greater than or equal to about 0.01 parts by weight and less than or equal to about 1 part by weight of a compound represented by Chemical Formula 1, based on 100 parts by weight of the negative active material, and at least one, selected from the electrolyte solution and the negative electrode, includes greater than or equal to about 0.

Abstract: Provided are a porous film, a separator including the porous film, an electrochemical device including the porous film, and a method of preparing the porous film. The porous film includes an aqueous resin of a single film having an elongation at break of about 50% or greater; and cellulose nanofibers, wherein an elongation at break of the porous film is about 3% or greater.

Abstract: A positive active material layer for a rechargeable lithium battery including a positive active material and a protection film-forming material is disclosed. A separator for a rechargeable lithium battery including a substrate and a porous layer positioned at least one side of the substrate and including a protection film-forming material is also disclosed. A rechargeable lithium battery can include at least one of the positive active material layer and the separator.

Abstract: The rechargeable lithium ion battery includes a positive active material including a lithium compound, a non-aqueous electrolyte including at least one disulfonate ester selected from a cyclic disulfonate ester represented by Chemical Formula 1 and a linear disulfonate ester represented by Chemical Formula 2, and includes at least one carbonate having an unsaturated bond selected from vinylene carbonate and vinylethylene carbonate. The non-aqueous electrolyte may include about 0.05 wt % to about 0.5 wt % of the disulfonate ester based on the total weight of the non-aqueous electrolyte, and about 0.2 wt % to about 1.5 wt % of the carbonate having the unsaturated bond based on the total weight of the non-aqueous electrolyte.

Abstract: The rechargeable lithium ion battery includes a positive active material including a lithium compound, a non-aqueous electrolyte including at least one disulfonate ester selected from a cyclic disulfonate ester represented by Chemical Formula 1 and a linear disulfonate ester represented by Chemical Formula 2, and includes at least one carbonate having an unsaturated bond selected from vinylene carbonate and vinylethylene carbonate. The non-aqueous electrolyte may include about 0.05 wt % to about 0.5 wt % of the disulfonate ester based on the total weight of the non-aqueous electrolyte, and about 0.2 wt % to about 1.5 wt % of the carbonate having the unsaturated bond based on the total weight of the non-aqueous electrolyte.

Abstract: A positive active material layer for a rechargeable lithium battery including a positive active material and a protection film-forming material is disclosed. A separator for a rechargeable lithium battery including a substrate and a porous layer positioned at least one side of the substrate and including a protection film-forming material is also disclosed. A rechargeable lithium battery can include at least one of the positive active material layer and the separator.

Abstract: A separator for a nonaqueous secondary battery includes a plurality of cellulose nanofibers and a hydroxyl group-masking component for masking hydroxyl groups on a surface of the cellulose nanofibers, wherein the cellulose nanofibers are cross-linked by the hydroxyl group-masking component to form a nonwoven fabric; as well as a nonaqueous electrolyte secondary battery including the separator, and a method of preparing the separator.

Abstract: A positive active material layer for a rechargeable lithium battery including a positive active material and a protection film-forming material is disclosed. A separator for a rechargeable lithium battery including a substrate and a porous layer positioned at least one side of the substrate and including a protection film-forming material is also disclosed. A rechargeable lithium battery can include at least one of the positive active material layer and the separator.

Abstract: In an aspect, an electrolyte that includes a lithium salt, an organic solvent, and an additive is disclosed.

Abstract: A rechargeable lithium battery includes: a positive electrode including a positive active material; and an electrolyte solution including a solvent and an additive, wherein the positive active material includes a lithium-containing transition metal oxide, the solvent includes a hydrofluoroether, and the additive includes a first additive represented by Chemical Formula 1 and at least one selected from a second additive represented by Chemical Formula 2, a third additive represented by Chemical Formula 3, and a fourth additive represented by Chemical Formula 4.

Abstract: A rechargeable lithium battery includes a negative electrode including a negative active material including a silicon-based material and a carbon-based material; and an electrolyte solution, wherein the negative electrode further includes greater than or equal to about 0.01 parts by weight and less than or equal to about 1 part by weight of a compound represented by Chemical Formula 1, based on 100 parts by weight of the negative active material, and at least one, selected from the electrolyte solution and the negative electrode, includes greater than or equal to about 0.