Disclosed herein is an electrode for a secondary battery including an electrode mixture layer including an electrode active material on one surface or both surfaces of a current collector, wherein the electrode mixture layer includes a plurality of fine holes recessed toward the current collector from a vertical cross-sectional surface, and each of the fine holes is a horn-shaped hole whose diameter is gradually decreased from the vertical cross-sectional surface toward the current collector in the electrode mixture layer.

Disclose are a cathode of an all-solid lithium battery, and a secondary battery system using the same. The cathode includes a lithium composite, and a method of manufacturing the lithium composite comprises: dispersing a solid electrolyte to be uniformly distributed in the pores of a mesoporous conductor to provide a solid electrolyte composite, and coating the solid electrolyte composite on the surface of a lithium compound including nonmetallic solids such as S, Se, and Te.

A nanocomposite includes one or more graphene-based materials (GMs), a nitrogen-containing polymer (an N-polymer), and elemental sulfur (S). The nanocomposite is suitable for use as a stable, high capacity electrode for rechargeable batteries such as lithium-sulfur (LiS) batteries. Example methods of fabricating a nanocomposite include the addition of an N-polymer to a dispersion (e.g., an aqueous dispersion) or slurry of GMs mixed with a sulfur sol. The N-polymer can interact strongly with the GMs to form a cross-linked network. In one embodiment, hydrothermal treatment of the aqueous dispersion or slurry is used to melt the sulfur such that it becomes distributed within the network formed by the GMs and the N-polymer. The resulting nanocomposite material can then be processed through the addition of one or more other binders and/or solvents, and formed into a final electrode.

A battery includes a first current collector, a laminate disposed on a first region of a surface of the first current collector, a thermal-expandable layer disposed on a second region of the surface of the first current collector, and a second current collector disposed on both of the laminate and the thermal-expandable layer. The laminate includes a first active material layer disposed on the first region, an electrolyte layer disposed on the first active material layer, and a second active material layer disposed on the electrolyte layer. A thermal expansion ratio of the thermal-expandable layer is greater than a thermal expansion ratio of the laminate.

A production method is provided for producing a lithium ion secondary battery. The lithium ion secondary battery has an external casing that houses an electrolytic solution and a power generating element. The power generating element includes a positive electrode and a negative electrode layered with a separator. The production method includes first charging the lithium ion secondary battery at a voltage range of 4.0 V or lower and then opening the external casing of the lithium ion secondary battery that has been charged at a range of 4.0 V or lower to discharge gas inside the lithium ion secondary battery to the exterior. Next, the production method further includes re-sealing the external casing and charging the lithium ion secondary battery from which the gas has been discharged until the cell voltage is greater than 4.0 V.

Present embodiments are directed to a battery module including a venting assembly and a method of manufacturing the battery module. The venting assembly may, in certain embodiments, be designed to vent gases from a plurality of battery cells disposed in a housing of the battery module. Each of the plurality of battery cells may include a battery cell vent. The venting assembly may include a lid designed to be coupled to the housing and disposed over the battery cells in the housing. In some embodiments, the lid includes a vent chamber formed in the lid and designed to receive and direct gases vented from the plurality of battery cells away from the battery module.

A carbon composite comprises: at least two carbon microstructures; and a binding phase disposed between the at least two carbon microstructures; wherein the binding phase includes a binder comprising one or more of the following SiO.sub.2; Si; B; B.sub.2O.sub.3; a metal; or an alloy of the metal, and the metal is at least one of aluminum; copper; titanium; nickel; tungsten; chromium; iron; manganese; zirconium; hafnium; vanadium; niobium; molybdenum; tin; bismuth; antimony; lead; cadmium; or selenium.

The method for manufacturing a laminated metal foil (1) according to the present invention includes: a first step of forming, in a weld site (A) of laminated layers of a metal foil (2), by the use of a cutter (C) whose longitudinal cross-sectional shape is a substantially V-shape, a notch (3) that is linear in a planar view and penetrates the laminated layers of the metal foil (2) in a lamination direction (S), to cause the laminated layers of the metal foil (2) to bond to each other along the lamination direction (S) at ends (3a) of a linear notch; and a second step of bringing an electrode (E) for resistance welding into press-contact with the weld site (A) and then energizing the weld site (A) via the electrode (E), to perform resistance welding on the laminated metal foil (1).

A secondary battery including a first electrode structure; a second electrode structure spaced apart from the first electrode structure; and an electrolyte layer disposed between the first electrode structure and the second electrode structure, wherein the first electrode structure includes: a current collector layer; and plurality of first active material plates electrically connected to the current collector layer, protruding from the current collector layer, and including a first active material, wherein each plate of the plurality of first active material plates has a width and a length greater than the width, and the plurality of first active material plates are spaced apart from one another in a widthwise direction and in a lengthwise direction, and wherein the electrolyte layer extends into gaps between the plurality of first active material plates along the lengthwise direction.

The present invention relates to a battery technology, and more particularly, to a current collector that may be widely used in secondary batteries and an electrode employing the same. The current collector includes a conductive fiber layer including a plurality of conductive fibers. Each of the conductive fibers includes a conductive core consisting of a plurality of metal filaments; and a conductive binder matrix surrounding the outer circumferential surfaces of the conductive core.