Abstract: Disclosed is an electrode assembly, a battery, and a battery pack and a vehicle including the same. In the electrode assembly, a first electrode, a second electrode, and a separator interposed therebetween are wound based on a winding axis to define a core and an outer circumference. The first electrode includes a first active material portion coated with an active material layer and a first uncoated portion not coated with an active material layer along a winding direction. At least a part of the first uncoated portion is defined as an electrode tab by itself. The first uncoated portion includes a first portion adjacent to the core of the electrode assembly, a second portion adjacent to the outer circumference of the electrode assembly, and a third portion interposed between the first portion and the second portion. The first portion or the second portion has a smaller height than the third portion in the winding axis direction.

Abstract: Disclosed is an electrode assembly, a battery, and a battery pack and a vehicle including the same. In the electrode assembly, a first electrode, a second electrode, and a separator interposed therebetween are wound based on an axis to define a core and an outer circumference. The first electrode includes an uncoated portion at a long side end thereof and exposed out of the separator along a winding axis direction of the electrode assembly. A part of the uncoated portion is bent in a radial direction of the electrode assembly to form a bending surface region that includes overlapping layers of the uncoated portion, and in a partial region of the bending surface region, the number of stacked layers of the uncoated portion is 10 or more in the winding axis direction of the electrode assembly.

Abstract: A foil tab forming apparatus forms at least one foil tab of a positive electrode foil tab and a negative electrode foil tab respectively provided at a top portion and a bottom portion of an electrode assembly. The foil tab forming apparatus includes a pre-forming jig configured to bend the foil tab by pressing the foil tab, while moving in a direction from an outer circumferential portion of the electrode assembly to a winding center portion of the electrode assembly and a forming jig configured to press the foil tab that has been primarily bent by the pre-forming jig, by moving along a direction parallel to a winding axis of the electrode assembly.

Abstract: The present disclosure relates to a cathode active material for an all-solid-state battery with a controlled particle size and a method for preparing the same. In particular, the cathode active material includes lithium and a transition metal, wherein the cathode active material has a single peak in the range of 1 ?m to 10 ?m as a result of particle size distribution (PSD) analysis.

Abstract: Disclosed is a method for pre-detecting a defective porous polymer substrate for a separator, including selecting a porous polymer substrate having a plurality of pores; observing the selected porous polymer substrate with a scanning electron microscope (SEM) to obtain an image of the porous polymer substrate; quantifying the average value of pore distribution index (PDI); correcting the quantified average value of pore distribution index to obtain the corrected average value of pore distribution index; determining whether or not the corrected average value of pore distribution index is 60 a.u. (arbitrary unit) or less; and classifying the porous polymer substrate as a good product, when the corrected average value of pore distribution index is determined to be 60 a.u. or less, and classifying the porous polymer substrate as a defective product, when the corrected average value of pore distribution index is determined to be larger than 60 a.u.

Abstract: An electrode assembly, a battery, a battery pack and a vehicle including the same are provided. In the electrode assembly, the uncoated portion of an electrode includes a segment region divided into a plurality of segments, and the segment region includes a plurality of segment groups separated by a group separation pitch along a winding direction. One end of the electrode assembly includes a plurality of segment alignments. In winding turns corresponding to the plurality of segment alignments, group separation pitches of segment groups disposed in a same winding turn are substantially identical, and separation pitches of the segment groups is greater in a winding turn of a region adjacent to the outer circumference of the electrode assembly than in a winding turn of a region adjacent to the core of the electrode assembly.

Abstract: A cathode active material for an all-solid-state battery including colloidal silica, a cathode active material, and a manufacturing method thereof are disclosed. It may be possible to achieve an enhancement in dispersion in a sulfide-based all-solid-state battery by controlling powder properties while reducing interfacial resistance between an electrolyte and a cathode active material of the sulfide-based all-solid-state battery.

Abstract: A cathode for all-solid-state batteries includes an additive as a sacrificial cathode material, and a method for manufacturing cathode for all-solid-state batteries. The additive may include a compound represented by Formula 1 below, (La2/3-xLi3x?1/3-2x)TiO3, ??[Formula 1] wherein ? may indicate a vacant site for achieving charge neutrality depending on a doping amount of lithium, and x may satisfy an equation of 0.04?x??.

Abstract: A cathode material for sulfide-based all-solid-state batteries, in which Li3V2(PO4)3 (LVP) is doped with a transition metal having an oxidation number of +5 or more and the surface of the cathode material is substituted with a halogen element so as to have improved surface stability and energy density and to suppress side reactions with a solid electrolyte, a manufacturing method thereof, and an all-solid-state battery using the same.

Abstract: Disclosed is a method of predicting the lithium ion conductivity of a solid electrolyte having a specific composition.

Abstract: Disclosed is a method of screening a solid electrolyte having excellent lithium ion conductivity and stability.

Abstract: The present disclosure relates to an all-solid-state battery analysis system capable of reliably obtaining an electrochemical signal according to the degree of charge of an electrode, and an all-solid-state battery analysis method using the same. The system may include a body member, of cylindrical shape, having a first cavity extending therethrough in a vertical direction and a second cavity extending therethrough in a horizontal direction and communicating with the first cavity. The system may include a first conductive member including a first base having a plate shape and a first protrusion protruding from the first base having a shape corresponding to a shape of the first cavity; and a second conductive member including a second base having a plate shape and a second protrusion protruding from the second base and having a shape corresponding to the shape of the first cavity.

Abstract: Disclosed are a coating composition for a composite positive electrode active material and a method of preparing a composite positive electrode active material using the same.

Abstract: Disclosed is a method of manufacturing a cathode active material for an all-solid-state battery by using sonication. The method includes: preparing a cathode active material; preparing a coating solution, the coating solution including a lithium-containing precursor and a transition-metal-containing precursor; preparing an admixture by adding the cathode active material to the coating solution; sonicating the admixture at a first temperature; and forming a coating layer including a lithium transition metal oxide on the cathode active material by heat-treating a resultant of the sonicating at a second temperature that is a temperature higher than the first temperature.

Abstract: The present invention provides a method for preparing metallic lithium by electrolysis using a non-aqueous electrolyte at low temperature. The method for preparing metallic lithium according to the present invention can directly prepare metallic lithium by electrolysis at a low temperature, and enable mass production, and reduce the manufacturing cost due to its simple process and easy control of electrolytic conditions, and thus the method for preparing lithium thin films according to the present invention can be applied in the industry.