A pouch-type secondary battery includes an electrode assembly having a structure in which electrodes and separators are alternately disposed; and a pouch-type exterior configured to accommodate the electrode assembly, wherein the exterior includes an accommodation part defining a space accommodating the electrode assembly; and a sealing part disposed along a circumference of the accommodation part in which some areas of the exterior are attached to each other so that the accommodation part is sealed from an outside, wherein a plurality of corners are disposed on the sealing part, at least one corner of the plurality of corners includes a recess part recessed toward the electrode assembly; and a diagonal part disposed adjacent to the recess part and extending toward the recess part in a diagonal direction crossing a longitudinal direction of the exterior.

A high-voltage energy module includes an insulating shell, a plurality of bare cells connected in series inside the insulating shell, one positive terminal and one negative terminal. The minimum number of bare cells is two. Each bare cell is formed by a positive film, a negative film and a separating film sandwiched between the positive film and the negative film. The positive film, the negative film and the separating film form a one-piece structure by conductive resin glue. Each two bare cells are connected by an insulating layer of flame-retardant composite insulating materials. The positive film is electrically connected to a positive conductive lug. The negative film is electrically connected to a negative conductive lug. There is only one electrical connection in the positive film, and there is only one electrical connection in the negative film.

The present disclosure relates to a positive electrode slurry for a lithium-sulfur battery including a positive electrode active material, an electrically conductive material, a binder and a solvent, where the ratio of the average particle diameter (D.sub.50) of the positive electrode active material and the positive electrode slurry is 1.5 or less, and the phase angle at 1 Hz of the positive electrode slurry is 50° or more. The positive electrode slurry for the lithium-sulfur battery of the present disclosure exhibits excellent flowability even while having a high solid content, thereby making it possible to manufacture a positive electrode for a lithium-sulfur battery with excellent electrochemical properties and improving the productivity and economic feasibility of the manufacturing process of the positive electrode for the lithium-sulfur battery.

The present disclosure relates to a positive electrode slurry for a lithium-sulfur battery including a positive electrode active material, an electrically conductive material, a binder and a solvent, where the ratio of the average particle diameter (D.sub.50) of the positive electrode active material and the positive electrode slurry is 1.5 or less, and the phase angle at 1 Hz of the positive electrode slurry is 50° or more. The positive electrode slurry for the lithium-sulfur battery of the present disclosure exhibits excellent flowability even while having a high solid content, thereby making it possible to manufacture a positive electrode for a lithium-sulfur battery with excellent electrochemical properties and improving the productivity and economic feasibility of the manufacturing process of the positive electrode for the lithium-sulfur battery.

The present invention relates to a battery cell with improved safety and a method of manufacturing the same, and more particularly a battery cell configured such that an electrode assembly including a positive electrode (200) and a negative electrode (300) located so as to be opposite each other in the state in which a separator (400) is interposed therebetween is received in a cell case (100), wherein the positive electrode (200) includes a positive electrode plate (210) and a positive electrode active material layer (220) provided on one surface and/or the other surface of the positive electrode plate (210), the negative electrode (300) includes a negative electrode plate (310) and a negative electrode active material layer (320) provided on one surface and/or the other surface of the negative electrode plate (310), the positive electrode active material layer (220) includes a first flat portion (221) and a first inclined portion (222) provided at each of opposite sides of the first flat portion (221), and the negative electrode active material layer (320) includes a second flat portion (321) and a second inclined portion (322) provided at each of opposite sides of the second flat portion (321) and a method of manufacturing the same.

The present invention relates to a battery cell with improved safety and a method of manufacturing the same, and more particularly a battery cell configured such that an electrode assembly including a positive electrode (200) and a negative electrode (300) located so as to be opposite each other in the state in which a separator (400) is interposed therebetween is received in a cell case (100), wherein the positive electrode (200) includes a positive electrode plate (210) and a positive electrode active material layer (220) provided on one surface and/or the other surface of the positive electrode plate (210), the negative electrode (300) includes a negative electrode plate (310) and a negative electrode active material layer (320) provided on one surface and/or the other surface of the negative electrode plate (310), the positive electrode active material layer (220) includes a first flat portion (221) and a first inclined portion (222) provided at each of opposite sides of the first flat portion (221), and the negative electrode active material layer (320) includes a second flat portion (321) and a second inclined portion (322) provided at each of opposite sides of the second flat portion (321) and a method of manufacturing the same.

A battery including power generation units each including a positive electrode layer, a separator layer, and a negative electrode layer. The area of either one of the positive electrode layer and the negative electrode layer is larger than the area of the other one of the positive electrode layer and the negative electrode layer. The power generation units each has a non-facing region. In the non-facing region, a first penetration portion is placed. The power generation units provided as the pair are stacked along the thickness direction via a first current collector including a second penetration portion corresponding to the first penetration portions. In the power generation units provided as the pair, two separator layers facing each other are fixed by a first fixing portion positioned in the first penetration portion and the second penetration portion.

An electrode for batteries that does not include a metal-film-type current collector is disclosed herein. In some embodiments, the electrode comprises a composite having a core-shell structure including a core having an electrode active material, and a metal material coated on or doped in the surface of the core. A secondary battery having the electrode has increased capacity and energy density and exhibits improved lifespan characteristics.

An electrode for batteries that does not include a metal-film-type current collector is disclosed herein. In some embodiments, the electrode comprises a composite having a core-shell structure including a core having an electrode active material, and a metal material coated on or doped in the surface of the core. A secondary battery having the electrode has increased capacity and energy density and exhibits improved lifespan characteristics.

A miniature electrochemical cell having a volume of less than 0.5 cc is described. The cell has a casing of first and second ceramic substrates that are hermetically secured to each other to provide an internal space housing an electrode assembly. First and second conductive pathways extend through the ceramic substrates. The pathways have respective inner surfaces that are conductively connected to the respective anode and cathode current collectors and respective outer surfaces that provide for connection to a load. An electrolyte in the internal space of the housing activates the electrode assembly.