Abstract: An electrochemical device includes an electrode assembly. The electrode assembly includes a first electrode plate, a second electrode plate, and a separator disposed between the first electrode plate and the second electrode plate. The first electrode plate includes a current collector, a tab, and an active material layer. The active material layer includes a body region and an edge region. Widths of the edge region and the body region are W1 and W2 respectively, and 0<W1/W2?5%. Thicknesses of the edge region and the body region are t1 and t2 respectively, and 95%?t1/t2?100%. The edge region falling with the foregoing parameter ranges helps to increase the energy density of the electrochemical device, reduce lithium plating hazards, and improve the safety of the electrochemical device.

Abstract: A positive electrode plate includes a composite current collector, a functional coating, and a positive electrode active material layer, where the functional coating is disposed on at least one surface of the composite current collector, and is located between the composite current collector and the positive electrode active material layer; and the functional coating comprises a positive electrode active material, and a D50 particle size of the positive electrode active material is less than or equal to 5 ?m. This can reduce the stress applied to the composite current collector during a cold pressing process without losing energy density. In addition, this also can mitigate misalignment of a metal layer and a polymer film due to inconsistent stretching extents, and alleviate problems such as cracking of the metal layer of the composite current collector and the metal layer tending to fall off from the polymer film.

Abstract: The present disclosure relates to stretchable and flexible lithium ion batteries that can store high energy density. The stretchable and flexible lithium ion battery can comprise flexible battery pouch cells connected in a serial, parallel, flat, or 3D configuration by, for example, stretchable, flexible, twistable, and durable material, which may include stretchable and flexible conductive connections.

Abstract: Disclosed is a battery pack including a battery module assembly including two or more battery modules, each of the battery modules having one or more battery cells arranged adjacent to each other in the state of being mounted in cartridges, a base plate allowing the battery module assembly to be loaded thereon, and a hold-down bracket fixing the battery module assembly to the base plate, wherein each of the cartridges includes a step portion having a lower part protruding outwards, the hold-down bracket includes an upper end portion covering upper surfaces of the step portions of the cartridges, a lower end portion coupled to the base plate, and a middle portion connecting the upper end portion and the lower end portion to each other, and a protrusion structure protruding in a direction toward the base plate is formed on the lower end portion.

Abstract: A solid state battery that includes: a battery element including, along a stacking direction, one or more battery constituent units including a positive electrode layer and a negative electrode layer each having extended portions, and a solid electrolyte layer interposed between the positive electrode layer and the negative electrode layer; a first external terminal and a second external terminal that a respectively electrically connected to the positive electrode layer and the negative electrode layer; a protective layer covering a surface of the battery element; and a buffer portion surrounding at least one of the positive electrode layer and the negative electrode layer in the plan view, wherein at least a local portion of the buffer portion between a side surface of the electrode layer having the extended portion and the external terminal includes a resin-free insulating material substantially identical to a resin-free insulating material of the protective layer.

Abstract: A functional layer-equipped separator for an electrochemical device includes a separator substrate and a functional layer for an electrochemical device disposed on at least one surface of the separator substrate. The functional layer for an electrochemical device contains inorganic particles and a particulate polymer. A surface of the functional layer for an electrochemical device has a maximum height Sz of 2.5 ?m or more. The functional layer for an electrochemical device includes one or more protrusions each containing the particulate polymer at a surface thereof.

Abstract: An electrochemical apparatus includes a positive electrode sheet including a positive electrode active material layer; a negative electrode sheet including a negative electrode active material layer; and a separator disposed between the positive electrode sheet and the negative electrode sheet. A mass ratio of fluorine to nitrogen on a surface layer of the positive electrode active material layer is A, a mass ratio of fluorine to nitrogen on a surface layer of the negative electrode active material layer is B, 3?A?50, and 30?B?300.

Abstract: Provided is a binder composition that can produce a slurry composition having excellent preservation stability and that can cause a functional layer to display excellent adhesiveness. The binder composition contains a polymer and a solvent. The polymer includes a (meth)acrylic acid ester monomer unit including an aromatic hydrocarbon ring in a proportion of not less than 5 mass % and not more than 45 mass % and includes a structural unit indicated by formula (I), shown below, in a proportion of not less than 50 mass % and not more than 90 mass %. In formula (I), R1 represents a hydrocarbon group having a carbon number of 4 or more that does not include an aromatic hydrocarbon ring and R2 represents a hydrogen atom, a methyl group, or —CH2—C(?O)—O—R1. In a case in which more than one R1 is present in formula (I), each R1 may be the same or different.

Abstract: An all-solid-state battery includes a solid electrode body including a positive electrode layer, a solid electrolyte layer, and a negative electrode layer, and a laminate film that stores the solid electrode body. The laminate film has a fragile part with respect to a needle-like foreign substance. The strength of the fragile part is lower than the strength of a part of the laminate film other than the fragile part.

Abstract: A positive electrode material, a positive electrode including the same, a lithium battery including the same, and a method of preparing the same are disclosed herein. In some embodiments, a method of preparing a positive electrode active material including forming a first coating layer on a surface of a lithium transition metal oxide represented by Formula 1 using a basic aqueous solution containing a coating element M1 (where M1 includes at least one selected from sodium (Na) and aluminum (Al)), dry-mixing the lithium transition metal oxide having the first coating layer formed on a surface thereof, and a raw material containing a coating element M2 (where M2 includes boron (B)) and heat treating the mixture to form a second coating layer.

Abstract: A battery cell includes a case, accommodating an electrode assembly therein, and a connection unit formed to have a tube shape and having one end bonded to an external surface of the case. The case includes a projection formed to protrude outwardly, and the projection is disposed in an internal surface of the connection unit.

Abstract: A method of processing a stack of layers to provide a stack of discrete layer elements, comprises the steps of: providing a stack of layers comprising: #a first layer (20) provided by a first material; #a third layer (16) provided by a solid electrolyte; and #a second layer (18) located between the first and third layers, the second layer having a thickness of at least 500 nm and being provided by a second material comprising at least 95 atomic % amorphous silicon; removing a through-thickness portion of the first layer (20) to form a first discrete layer element (20a) provided by the first material; removing a through-thickness portion of the second layer (18) to form a second discrete layer element (18a) provided by the second material, the second discrete layer element being located between the first discrete layer element (20a) and the solid electrolyte; and etching the third layer (16) using the second discrete layer element (18a) as an etching mask, to form a third discrete layer element (16a) provided

Abstract: A lithium-ion secondary battery having high capacity and excellent charge and discharge cycle performance is provided. A secondary battery having high capacity is provided. A secondary battery having excellent charge and discharge performance is provided. A secondary battery in which a decrease in capacity is suppressed even at high temperatures is provided. The secondary battery includes a positive electrode, a negative electrode, an electrolyte solution, and an exterior body. The positive electrode includes a positive electrode active material. The positive electrode active material contains lithium, cobalt, oxygen, magnesium, and fluorine. The number of magnesium atoms contained in the positive electrode active material is greater than or equal to 0.001 times and less than or equal to 0.1 times the number of cobalt atoms contained in the positive electrode active material. The positive electrode active material includes a region having a layered rock-salt crystal structure.

Abstract: The positive electrode active material has high capacity and high output and exhibiting excellent cycle characteristics when being used for a positive electrode of a non-aqueous electrolyte secondary battery. A positive electrode active material for a lithium ion secondary battery contains: a lithium-metal composite oxide containing secondary particles with a plurality of aggregated primary particles; and a compound containing lithium and tungsten present on surfaces of the primary particles. The amount of tungsten contained in the compound containing lithium and tungsten is 0.5 atom % or more and 3.0 atom % or less in terms of a ratio of the number of atoms of W with respect to the total number of atoms of Ni, Co, and an element M, and a conductivity when the positive electrode active material is compressed to 4.0 g/cm3 as determined by powder resistance measurement is 6×10?3 S/cm or less.

Abstract: An intermediate layer containing CeO2 with which a rare earth element (excluding Ce) forms a solid solution and a first electrode layer may be disposed in this order on a surface on one side of a solid electrolyte layer containing Zr, and a second electrode layer may be disposed on a surface on another side opposite the surface of the one side of the solid electrolyte layer. The intermediate layer includes a first layer located closer to the solid electrolyte layer and a second layer disposed on the first layer and located closer to the first electrode layer, and a concentration of the rare earth element of the first layer may be greater than a concentration of the rare earth element of the second layer.

Abstract: A method to create a battery cell is provided. The method includes, within a vacuum or an inert atmosphere, utilizing an etching process to remove a passivation layer from a primary surface of a solid electrolyte. The method further includes applying a surface coating to the primary surface. The method further includes, within the battery cell, disposing the solid electrolyte including the surface coating between an anode and a cathode.

Abstract: A mounting structure is provided for mounting a battery pack on a floor of a vehicle cabin. The installation structure includes a bottom plate of a housing of the battery pack, cooling pipes provided inside or on a surface of the bottom plate for circulating coolant, and a plate-shaped underguard. The underguard has upwardly protruding ribs and downwardly protruding ribs that are alternately arranged. The cooling pipes are provided inside or on the surface of the bottom plate of the housing. The cooling pipes are arranged to face the downwardly protruding ribs. The underguard is attached to the housing such that a top plate of the upwardly protruding ribs and a bottom plate of the housing are spaced apart.

Abstract: A negative electrode material for a secondary battery includes a matrix containing silicon oxide, a composite oxide of one or more doping elements selected from the group consisting of an alkali metal, an alkaline earth metal, and a post-transition metal, and silicon, or a mixture thereof; and silicon nanoparticles dispersed and embedded in the matrix; wherein a hardness and a Young's modulus measured by a nanoindentation test are 4.0 GPa or more and 40 GPa or more, respectively, and in an X-ray diffraction pattern using a CuK? ray, a ratio (A1/A2) of an area (A1) of a first peak present in a region where a diffraction angle 2? is 10° to 27.4° to an area (A2) of a second peak present in a region where the diffraction angle 2? is 28±0.5° is 0.8 to 6.

Abstract: A battery material includes a compound having an imidazoline ring and an aromatic ring. The compound has a molecular weight of less than 350. The compound is, for example, 2-benzylimidazoline. The battery material, for example, further includes a solid electrolyte. The solid electrolyte has, for example, a particle shape. The compound is, for example, located between a plurality of particles of the solid electrolyte.

Abstract: Battery systems according to embodiments of the present technology may include a battery including a first electrode terminal and a second electrode terminal accessible along a first surface of the battery. The battery may define a recessed portion of the battery along the first surface of the battery between the first electrode terminal and the second electrode terminal. The battery systems may include a module electrically coupled with the battery. The module may include a circuit board. The module may include a first conductive tab extending from a second surface of the circuit board opposite the first surface of the circuit board. The first conductive tab may be electrically coupling the module with the first electrode terminal. The module may include a second conductive tab extending from the second surface of the circuit board. The second conductive tab may be electrically coupling the module with the second electrode terminal.