Abstract: An electrode structure includes a base layer including a first active material, and a plurality of active material plates on a first surface of the base layer and spaced apart from one another, the plurality of active material plates including a second active material. An active material density of the base layer is less than an active material density of an active material plate of the plurality of active material plates.

Abstract: An electrode structure includes: a base layer including a first active material; a plurality of active material plates, a plate of the plurality of active material plates including opposing side walls and a lower wall, wherein the lower wall is disposed on the base layer, wherein adjacent plates of the plurality of active material plates are spaced apart from each other, and wherein an active material plate of the plurality of active material plates includes a second active material; and a channel between adjacent plates of the plurality of active material plates, wherein the channel includes a first channel region defined by adjacent side walls of the adjacent plates, and a second channel region connected to the first channel region and defined by a lower wall of the adjacent plates and the base layer.

Abstract: A secondary battery includes a substrate defining first and second through holes; a battery cell on the substrate and including a positive electrode, a separator and a negative electrode; an adhesive layer on the substrate and together with the substrate and the battery cell, removably attachable to an object outside of the secondary battery; a first electrode terminal including a first end electrically connected to the positive electrode and a second end which is opposite to the first end electrically connected to the positive electrode and exposed to the outside of the secondary battery at the first through hole; and a second electrode terminal including a first end electrically connected to the negative electrode and a second end which is opposite to the first end connected to the negative electrode and exposed to the outside of the secondary battery at the second through hole.

Abstract: An electrode-composite separator assembly for a lithium battery, the electrode-composite separator assembly including an electrode; and a composite separator, wherein the composite separator includes a separator, and a coating film disposed on a surface of the separator, wherein the coating film includes a copolymer including an electrolyte-insoluble repeating unit and a repeating unit represented by Formula 1; and at least one selected from an inorganic particle and an organic-inorganic particle, wherein the electrode-composite separator assembly does not have an exothermic peak between 400° C. to 480° C. when analyzed by differential scanning calorimetry, wherein Formula 1 is wherein, in Formula 1, R3 is hydrogen or a C1-C5 alkyl group, and R4 is a C1-C10 alkyl group. Also, a lithium battery including the electrode-composite separator assembly.

Abstract: An electrode-composite separator assembly for a lithium battery includes: an electrode; and a composite separator, wherein the composite separator includes: a copolymer including a first repeating unit represented by Formula 1, a second repeating unit represented by Formula 2, and a third repeating unit represented by Formula 3; at least one selected from an inorganic particle and an organic-inorganic particle; and at least one polymer selected from a fluorinated polymer and a heat-resistant polymer, wherein Formulas 1-3 are Also a lithium battery including the electrode composite separator assembly.

Abstract: An electrochemical device including: a positive electrode current collector; a plurality of positive electrodes disposed on the positive electrode current collector; an electrolyte layer disposed on the plurality of positive electrodes; a negative electrode disposed on the electrolyte layer; and a negative electrode current collector disposed on the negative electrode, wherein the electrolyte layer includes a first electrolyte layer and a second electrolyte layer, and wherein the second electrolyte layer is between the first electrolyte layer and the negative electrode.

Abstract: A battery changeable-type earbud includes a body from which an acoustic signal is provided to a user, including: a slot with which a battery of the earbud is removably disposed, and an inlet of the slot open at an outer surface of the body and through which the battery is removably disposed with the slot; and an insertion unit protruded from the body, which is insertable to an orifice of the user and through which the acoustic signal is provided from the body of the earbud to the orifice of the user.

Abstract: An electrochemical cell includes: an electrode assembly; and a housing including a first sheet and a second sheet, wherein the first sheet includes a first gas blocking layer, and a first sealing layer, and wherein the second sheet includes a second gas blocking layer and a second sealing layer, wherein the housing defines an accommodation region which accommodates the electrode assembly, which is disposed between the first sheet and the second sheet, and wherein the housing includes a bonded member, wherein the bonded member includes a third gas blocking layer disposed between the first gas blocking layer and the second gas blocking layer, wherein the third gas blocking layer includes a plurality of nanostructures.

Abstract: A positive active material including: a core comprising a metal oxide, a non-metal oxide, or a combination thereof capable of intercalation and deintercalation of lithium ions or sodium ions; and a non-conductive carbonaceous film including oxygen on at least one portion of a surface of the core; a lithium battery including the positive active material; and a method of manufacturing the positive active material.

Abstract: A positive active material including: a core comprising a metal oxide, a non-metal oxide, or a combination thereof capable of intercalation and deintercalation of lithium ions or sodium ions; and a non-conductive carbonaceous film including oxygen on at least one portion of a surface of the core; a lithium battery including the positive active material; and a method of manufacturing the positive active material.

Abstract: An electrode active material including an ordered mesoporous metal oxide; and at least one conductive carbon material disposed in a pore of the ordered mesoporous metal oxide. Also, an electrode including the electrode active material, and a lithium battery including the electrode.

Abstract: An electrode assembly including an electrode structure including a first electrode plate and a second electrode plate which are alternately disposed, and a separator film that is disposed between the first electrode plate and the second electrode plate, wherein a surface of the separator film is bonded to the first electrode plate, and a binding member, which rigidly connects at least one selected from the first electrode plate, the second electrode plate, and the separator film.

Abstract: An electrode-composite separator assembly for a lithium battery, the electrode-composite separator assembly including an electrode; and a composite separator, wherein the composite separator includes a separator, and a coating film disposed on a surface of the separator, wherein the coating film includes a copolymer including an electrolyte-insoluble repeating unit and a repeating unit represented by Formula 1; and at least one selected from an inorganic particle and an organic-inorganic particle, wherein the electrode-composite separator assembly does not have an exothermic peak between 400° C. to 480° C. when analyzed by differential scanning calorimetry, wherein Formula 1 is wherein, in Formula 1, R3 is hydrogen or a C1-C5 alkyl group, and R4 is a C1-C10 alkyl group. Also, a lithium battery including the electrode-composite separator assembly.

Abstract: An electrochemical cell includes: an electrode assembly; and a housing including a first sheet and a second sheet, wherein the first sheet includes a first gas blocking layer, and a first sealing layer, and wherein the second sheet includes a second gas blocking layer and a second sealing layer, wherein the housing defines an accommodation region which accommodates the electrode assembly, which is disposed between the first sheet and the second sheet, and wherein the housing includes a bonded member, wherein the bonded member includes a third gas blocking layer disposed between the first gas blocking layer and the second gas blocking layer, wherein the third gas blocking layer includes a plurality of nanostructures.

Abstract: An electrode-composite separator assembly for a lithium battery includes: an electrode; and a composite separator, wherein the composite separator includes: a copolymer including a first repeating unit represented by Formula 1, a second repeating unit represented by Formula 2, and a third repeating unit represented by Formula 3; at least one selected from an inorganic particle and an organic-inorganic particle; and at least one polymer selected from a fluorinated polymer and a heat-resistant polymer, wherein Formulas 1-3 are Also a lithium battery including the electrode composite separator assembly.

Abstract: A negative active material including: a composite particle including a non-carbonaceous nanoparticle that allows lithiation and delithiation of lithium ions, and a (meth)acryl polymer disposed on a surface of the non-carbonaceous nanoparticle; and a crystalline carbonaceous nanosheet.

Abstract: An electrode plate includes an electrode structure, the electrode structure including: a current collector; an electrode active material layer disposed on at least a portion of the current collector; and at least one slit which extends from a first side surface of the electrode structure to a point on a top surface of the electrode structure, wherein the at least one slit extends through the electrode active material layer. Also an electrode assembly and a secondary battery each include the electrode plate.

Abstract: An anode active material includes: a core including a metal or a metalloid that can incorporate and deincorporate lithium ions; and a plurality of coating layers on a surface of the core, each coating layer including a metal oxide, an amorphous carbonaceous material, or combination thereof. Also, a lithium battery including the anode active material, and a method of preparing the anode active material.

Abstract: An electrode assembly includes at least one first electrode plate; at least one second electrode plate facing the at least one first electrode plate; a first separation film of which a surface thereof is bonded to the at least one first electrode plate which faces the at least one second electrode plate; and a second separation film of which a surface thereof is bonded to the at least one second electrode plate which faces the at least one first electrode plate. The first separation film and the second separation film of which surfaces thereof are bonded to the first electrode plate and the second electrode plate, are disposed between the first and second electrode plates facing each other.

Abstract: A positive active material including: a core comprising a metal oxide, a non-metal oxide, or a combination thereof capable of intercalation and deintercalation of lithium ions or sodium ions; and a non-conductive carbonaceous film including oxygen on at least one portion of a surface of the core; a lithium battery including the positive active material; and a method of manufacturing the positive active material.