Abstract: A secondary battery including an electrode assembly and a pouch configured to accommodate the electrode assembly. The pouch includes two first covers provided on both surfaces of the electrode assembly in a thickness direction and two second covers provided on both surfaces of the electrode assembly in a full-width direction. The edge surfaces of the first covers and the second covers are sealed by a first sealing part, and the end surfaces of the first covers and the second covers are sealed by a second sealing part. The two second covers are in close contact with both the surfaces of the electrode assembly in the full-width direction.

Abstract: A positive electrode for a lithium secondary battery and a lithium secondary battery including the same, and a method of making the same are disclosed herein. In some embodiments, a positive electrode includes a current collector, a first mixture layer, and a second mixture layer that are sequentially stacked, wherein the first mixture layer includes a first binder composed of a rubber-based resin, and wherein the second mixture layer includes a second binder composed of a fluorine-based resin derived from a fluorine (F)-containing monomer. By using a first binder exhibiting more hydrophobicity than a second binder adhesive strength between a positive electrode current collector and the mixture layer, and durability of the positive electrode, can be improved. When the first mixture layer contains a positive electrode additive, damage to the positive electrode can be minimized, and the electrical performance and lifetime of the lithium secondary battery can be improved.

Abstract: Provided is a positive electrode for a lithium secondary battery and a lithium secondary battery including the same, wherein the positive electrode is manufactured by using a pre-dispersion containing a positive electrode additive represented by Chemical Formula 1 and a conductive material having a linear structure in a positive electrode mixture layer as an irreversible additive and, by adjusting the electrode sheet resistance to satisfy a specific range, it is possible to reduce the amount of oxygen gas generated during charging and discharging, as well as easily improve the charging and discharging efficiency of the lithium secondary battery.

Abstract: Provided is a positive electrode for a lithium secondary battery with improved structural stability, a manufacturing method thereof, and a lithium secondary battery including the same. When the positive electrode containing a positive electrode additive is manufactured, the conditions of first and second rolling operations are controlled so that there is an advantage in that structures and electrical properties of a first mixture layer and a second mixture layer can be improved.

Abstract: A lithium secondary battery and a method of manufacturing the lithium secondary battery are provided. In the lithium secondary battery, a positive electrode additive represented by Formula 1 as an irreversible additive is included in a positive electrode mixture layer, and a ratio (CC/DC) of an initial charge capacity (CC) to an initial discharge capacity (DC) is adjusted within a specific range, thereby reducing the amount of oxygen gas generated in the charging/discharging of the lithium secondary battery, and at the same time, inhibiting self-discharging and improving an operating voltage by improving the open circuit voltage of the battery in initial activation and/or subsequent high-temperature storage. The lithium secondary battery including the same can be effectively used as a power source for mid-to-large devices such as electric vehicles.

Abstract: The present technology provides a positive electrode for a lithium secondary battery and a lithium secondary battery including the same. In the positive electrode, a positive electrode additive represented by Formula 1 is contained in a positive electrode mixture layer, and specific X-ray diffraction (XRD) and/or extended X-ray absorption fine-structure (EXAFS) peak(s) are controlled for cobalt remaining in the positive electrode mixture layer after initial charging to SOC 100% to have a specific oxidation number, thereby reducing side reactions caused by the irreversible additive, that is, the positive electrode additive, and reducing the amount of gas such as oxygen generated during charging/discharging. Therefore, the lithium secondary battery has an excellent effect of improving battery safety and electrical performance.

Abstract: The present technology relates to a positive electrode additive for a lithium secondary battery and a positive electrode for a lithium secondary battery including the same, wherein the positive electrode additive contains a carbon material on a surface of a lithium cobalt oxide represented by Chemical Formula 1 to improve the low electrical conductivity of the positive electrode additive, and an effect of improving the problem caused by the amount of gases generated during initial charging and discharging (i.e., “activation”) is excellent, and thus a positive electrode and lithium secondary battery including the positive electrode additive have excellent electrical performance.

Abstract: The present disclosure relates to aA negative electrode for a lithium secondary battery and a lithium secondary battery including the same, wherein the negative electrode includes a negative electrode active material which contains a carbon material and a silicon material, contains Si in a specific content, and has a form and/or structure in which the size of each material is controlled so that it is possible to improve the charging/discharging capacity and efficiency of the negative electrode, suppress the side reaction between the negative electrode active material and the electrolyte during the charging and discharging while solving a problem of the negative electrode mixture layer peeling due to the expansion and contraction of the negative electrode active material.

Abstract: An electrode assembly for a lithium secondary battery and a positive electrode for the lithium secondary battery including the electrode assembly. By controlling a ratio (CRLip/CRSi) between a content percentage of a positive electrode additive and a silicon (Si)-containing material that is a negative electrode active material, which are contained in a positive electrode mixture layer and a negative electrode mixture layer, respectively, to a specific range, the electrode assembly has an advantage in that high charging/discharging capacity and charging/discharging efficiency can be realized during initial charging/discharging, a capacity retention rate can be excellent during subsequent charging/discharging, and a lithium secondary battery including the electrode assembly can exhibit a high energy density and long lifetime.

Abstract: A master batch for a positive electrode additive and a positive electrode slurry for a lithium secondary battery that contains the same, wherein the master batch contains a high content of irreversible additive together with a positive electrode active material so that a small amount of irreversible additive is dispersed in the positive electrode slurry with high dispersion without loss when a positive electrode is manufactured, and thus a positive electrode for a lithium secondary battery manufactured using the irreversible additive has high electrical properties and reliability, and a degree of freedom in design is improved when the positive electrode is manufactured.

Abstract: Provided is a positive electrode for a lithium secondary battery and a lithium secondary battery including the same, and the positive electrode contains a positive electrode additive represented by Formula 1 and a positive electrode mixture layer including a region with a needle-shaped crack structure in its cross-section after initial charging (activation), so an amount of gas such as oxygen generated by an irreversible additive, which is a positive electrode additive, during the subsequent charging/discharging is reduced, and the migration path of lithium ions and/or electrons is able to be ensured. Therefore, an excellent effect of improving the battery safety and electrical performance of a lithium secondary battery is exhibited.

Abstract: Provided is a lithium secondary battery comprising an electrolyte and an electrode assembly, wherein the electrode assembly comprises a positive electrode, a negative electrode, and a separator interposed between the positive electrode and the negative electrode. The positive electrode comprises a positive electrode current collector and a positive electrode mixture layer positioned on the positive electrode current collector, wherein the positive electrode mixture layer comprises a positive electrode active material, a positive electrode additive represented by Chemical Formula 1 (LipCo(1-q)M1qO4), a conductive material, and a binder. The lithium secondary battery satisfies Expression 1 (ALCO/A0) with 2.0 or more and 20.0 or less after charging to a state of charge (SoC) of 100% in an activation process under conditions of a voltage of 3.5 V to 4.5 V and a current of 0.1 to 0.5 C.

Abstract: Provided is a positive electrode slurry for a positive electrode for a lithium secondary battery, which is manufactured using the same. The positive electrode slurry is composed of a two-liquid type composition, contains the positive electrode additive represented by Chemical Formula 1 (LipCo(1-q)M1qO4), which is used as an irreversible additive, in a large amount, and contains the first liquid whose viscosity is adjusted within a specific range (i.e. 5,000 to 8,000 cps). Thus, not only is there an advantage in that the dispersibility and workability of the positive electrode additive are excellent, but also since it is possible to suppress side reactions while minimizing the loss of the positive electrode additive contained in the positive electrode slurry, the state stability of the positive electrode slurry can be improved, and thus the electrical properties of the positive electrode manufactured using the positive electrode slurry are excellent.

Abstract: Provided are a positive electrode including a positive electrode additive, a method of manufacturing the positive electrode, and a lithium secondary battery including the positive electrode. A coating temperature of a slurry is adjusted when the positive electrode is manufactured, and thus the deformation of the positive electrode additive due to temperature is minimized, and accordingly, structural deformation of the positive electrode additive included in the positive electrode is prevented.

Abstract: The present invention relates to a pouch-shaped battery cell including an electrode assembly with a venting adjustment member. The pouch-shaped battery case can be configured to receive the electrode assembly, with an electrode lead extending from the electrode assembly. A part of the electrode lead can protrude outwards from the pouch-shaped battery case. A sealed portion can be formed at an outer periphery of the pouch-shaped battery case. The venting adjustment member can be mounted to a part of the sealed portion in a direction in which the electrode lead protrudes. The venting adjustment member is configured to adjust opening and closing of the sealed portion having the venting adjustment member mounted thereto based on the pressure of gas in the pouch-shaped battery case.

Abstract: Provided are a positive electrode for a lithium secondary battery and a lithium secondary battery containing the same. The positive electrode includes a positive electrode current collector and a positive electrode mixture layer disposed thereon and includes a positive electrode active material, a positive electrode additive represented by Formula 1 (LipCo(1-q)M1qO4), a conductive material, and a binder. Furthermore, Equation 1 (RLCZO/R0) is 1.55 or less, wherein RLCO represents an electrode sheet resistance when the positive electrode additive represented by Formula 1 is contained in the positive electrode mixture layer, and R0 represents an electrode sheet resistance when the positive electrode additive represented by Formula 1 is not contained in the positive electrode mixture layer. The positive electrode is manufactured using a pre-dispersion containing the positive electrode additive in a positive electrode mixture layer as an irreversible additive.

Abstract: Disclosed is a battery cell, a battery module, a battery pack, and a vehicle. The battery cell may include a venting guide unit to discharge a venting gas in a desired direction and from a desired location of a cell case of the battery when a thermal event occurs. The battery cell may include an electrode assembly and an electrode lead connected to the electrode assembly. The cell case may be configured to accommodate the electrode assembly therein and support the electrode lead. The venting guide unit provided to the cell case may be configured to guide a venting gas to be discharged to a predetermined region of the cell case as an internal pressure of the cell case increases.

Abstract: An electrode assembly having a high energy density and a lithium secondary battery including the same are disclosed herein. The electrode assembly includes a positive electrode in which a positive electrode mixture layer includes a positive electrode active material and a positive electrode additive and a negative electrode in which a negative electrode mixture layer includes graphite mixed with silicon (Si)-containing particles. The amount of gas generated during charging and discharging of a battery is reduced, the resistance change rate of the electrode is low even after charging and discharging, and accordingly, a lithium secondary battery including the electrode assembly has a high energy density, a long lifetime, and good quick charging efficiency.

Abstract: A novel alkali-soluble polymer compound including a dehydrogenated pimaric acid and/or its isomer as a repeating unit, and a photosensitive resin composition including the alkali-soluble polymer compound as an effective binder matrix are provided. A photosensitive resin composition using the alkali-soluble polymer compound including a dehydrogenated resin acid has excellent photosensitivity and developing characteristics cause a less deformation in a firing process, has excellent elasticity. Thus, the photosensitive resin composition is advantageous for curing various transparent photosensitive materials, in particular, materials of column spacers, an overcoat, a passivation layer, or the like, used for fabricating color filters of an LCD.

Abstract: A novel alkali-soluble polymer compound including a dehydrogenated pimaric acid and/or its isomer as a repeating unit, and a photosensitive resin composition including the alkali-soluble polymer compound as an effective binder matrix are provided. A photosensitive resin composition using the alkali-soluble polymer compound including a dehydrogenated resin acid has excellent photosensitivity and developing characteristics cause a less deformation in a firing process, has excellent elasticity. Thus, the photosensitive resin composition is advantageous for curing various transparent photosensitive materials, in particular, materials of column spacers, an overcoat, a passivation layer, or the like, used for fabricating color filters of an LCD.