Abstract: An electrode including a current collector; and an electrode active material layer disposed on at least one surface of the current collector is disclosed. The electrode active material layer includes a lower layer region facing the current collector, and an upper layer region facing the lower layer region and extended to the surface of the electrode active material layer. The lower layer region includes a first active material and a first non-rubbery binder and is free from a rubbery binder. The upper layer region includes a second active material, a second non-rubbery binder, and a rubbery binder. The rubbery binder is a hydrogenated nitrile butadiene rubber (H-NBR). Each of the first non-rubbery binder and the second non-rubbery binder includes a polyvinylidene fluoride (PVDF)-based polymer, and the weight ratio of the second non-rubbery binder to the rubbery binder in the upper layer region is 1:0.03-1:0.07.

Abstract: An electrode including a current collector; and an electrode active material layer disposed on at least one surface of the current collector is disclosed. The electrode active material layer includes a lower layer region facing the current collector, and an upper layer region facing the lower layer region and extended to the surface of the electrode active material layer. The lower layer region includes a first active material and a first non-rubbery binder and is free from a rubbery binder. The upper layer region includes a second active material, a second non-rubbery binder, and a rubbery binder. The rubbery binder is a hydrogenated nitrile butadiene rubber (H-NBR). Each of the first non-rubbery binder and the second non-rubbery binder includes a polyvinylidene fluoride (PVDF)-based polymer, and the weight ratio of the second non-rubbery binder to the rubbery binder in the upper layer region is 1:0.03-1:0.07.

Abstract: An activation method for a lithium secondary battery, and a lithium secondary battery manufactured using the same are disclosed herein. In some embodiments, the method comprises charging a secondary battery, wherein the secondary battery includes a positive electrode having a sacrificial positive electrode material represented by Formula 1 and having an orthorhombic structure, a negative electrode, a separator interposed between the positive electrode and the negative electrode, and an electrolyte solution, and then holding the secondary battery for a predetermined period of time at a voltage of 3.2 V or greater.

Abstract: A secondary battery including a positive electrode, a negative electrode and a separator interposed between the negative electrode and the positive electrode. The negative electrode includes: a negative electrode current collector; and a negative electrode active material layer on at least one surface of the negative electrode current collector. The negative electrode active material layer includes a mixed active material comprising a carbonaceous active material and a Si-based active material. The secondary battery is controlled by setting a lower limit of state-of-charge (SOC) during operation of the secondary battery depending on a weight mixing ratio of the Si-based active material to the carbonaceous active material. The capacity ratio of the Si-based active material to the carbonaceous active material.

Abstract: A positive electrode active material includes a lithium transition metal oxide having a spinel crystal structure, and a coating layer positioned on the surface of the lithium transition metal oxide, wherein the coating layer has an orthorhombic structure, and includes an oxide represented by Formula 1. A method for producing the positive electrode active material, a positive electrode including the positive electrode active material, and a lithium secondary battery, the positive electrode active material.

Abstract: A rolling method for an electrode, the method comprising the steps of: coating an electrode slurry including an electrode active material, on a current collector, to form an electrode specimen; measuring rheological properties of the electrode specimen according to temperature; deriving an appropriate temperature condition for rolling the electrode from the rheological properties of the electrode specimen according to temperature; and rolling the electrode in the appropriate temperature condition.

Abstract: The present invention provides an electrode assembly, in which a plurality of electrodes are laminated, and a separator is inserted between adjacent electrodes. The outermost electrode disposed at an outermost layer of the electrode assembly includes a slurry applied to one surface of a current collector, and a protection layer adhered to the other surface of the current collector. Further, the outermost electrode is laminated to allow the slurry to contact the separator. Furthermore, a method for manufacturing the electrode assembly comprises applying a slurry to one surface of a current collector and laminating a protection layer on the other surface of the current collector to form an outermost electrode; allowing the outermost electrode to pass between a pair of press-rollers to perform a rolling process; and laminating the rolled outermost electrode to be disposed on an uppermost layer or a lowermost layer of the electrode assembly.

Abstract: The present invention relates to an anode including multiple current collectors juxtaposed in parallel, and a secondary battery comprising same, wherein the anode enables providing a high-capacity secondary battery while suppressing volume changes due to a silicone component-containing active material employed therein.

Abstract: The present invention relates to a cathode comprising a mixture layer having a dual layer structure with different LNO amounts, and a secondary battery comprising same, the cathode enabling battery performance to increase while preventing battery cell stability from degrading.

Abstract: Disclosed are an electrode active material having improved energy density and a lithium secondary battery including the same. More particularly, provided is an electrode active material including a first electrode active material and a second electrode active material, each of the first electrode active material and the second electrode active material having a composition represented by Formula (1) below, a ratio of lithium to metals in the first electrode active material being 1.4 to 1.7, and a ratio of lithium to metals in the second electrode active material being 1.2 or more and less than 1.4: (1?x)LiM?O2?yAy?xLi2MnO3?y?Ay???(1) wherein M? is MnaMb; M is at least one selected from the group consisting of Ni, Ti, Co, Al, Cu, Fe, Mg, B, Cr, Zr, Zn and Period II transition metals; A is at least one selected from the group consisting of anions such as PO4, BO3, CO3, F and NO3; 0<x<1; 0<y?0.02; 0<y??0.02; 0.5?a?1.0; 0?b?0.5; and a+b=1.

Abstract: The present invention provides an electrode assembly, in which a plurality of electrodes are laminated, and a separator is inserted between adjacent electrodes. The outermost electrode disposed at an outermost layer of the electrode assembly includes a slurry applied to one surface of a current collector, and a protection layer adhered to the other surface of the current collector. Further, the outermost electrode is laminated to allow the slurry to contact the separator. Furthermore, a method for manufacturing the electrode assembly comprises applying a slurry to one surface of a current collector and laminating a protection layer on the other surface of the current collector to form an outermost electrode; allowing the outermost electrode to pass between a pair of press-rollers to perform a rolling process; and laminating the rolled outermost electrode to be disposed on an uppermost layer or a lowermost layer of the electrode assembly.

Abstract: Disclosed is a battery cell having an electrode assembly that is sealed with an electrolyte solution within a battery case, the electrode assembly including one or more positive electrodes to which a positive electrode terminal is connected; one or more first negative electrodes to which a first negative electrode terminal is connected; one or more second negative electrodes to which a second negative electrode terminal is connected; and a separator disposed between the positive electrode and the first negative electrode or second negative electrode, or a separator disposed between the positive electrode and the first negative electrode or second negative electrode and a separator disposed between the first negative electrode and the second negative electrode.

Abstract: Disclosed is a method of manufacturing a lithium secondary battery including a positive electrode active material, wherein the positive electrode active material includes one or more lithium transition metal oxides selected from compounds represented by Formula 1 defined in claim 1, and activation of the lithium secondary battery is conducted while changing charge/discharge voltage ranges and number of cycles depending on doping amount of M1 in Formula 1.

Abstract: Disclosed herein is a cylindrical battery including an electrode assembly (jelly roll) including a positive electrode, a separator, and a negative electrode, a cylindrical container including a receiving part for receiving the electrode assembly together with an electrolytic solution, a cap assembly mounted to an open upper end of the cylindrical container, a safety vent mounted in the cap assembly, and a pressurization part located between the safety vent and the receiving part, the pressurization part communicating with the receiving part, the pressurization part being configured to apply a predetermined pressure, which is generated by gas, to the receiving part, wherein the positive electrode includes a lithium composite transition metal oxide represented by Formula 1 in the specification as a positive electrode active material.

Abstract: Disclosed herein are a positive electrode active material including at least one selected from among compounds represented by Formula 1 below and a lithium secondary battery including the same that is capable of improving lifetime characteristics and rate characteristics while exhibiting excellent safety: Li[LixMyM?(1-x-y)]O2-zAz (1), where M is at least one element selected from a group consisting of Ru, Mo, Nb, Te, Re, Ir, Pt, Cr, S, W, Os, and Po, M? is at least one element selected from a group consisting of Ni, Ti, Co, Al, Mn, Fe, Mg, B, Cr, Zr, Zn, and second row transition metals, A is a negative monovalent or divalent anion, and 0<x<0.3, 0.2?y?0.5, 0?z<0.5, and 0.2<x+y<0.8.

Abstract: Disclosed is a secondary battery to which an electrolyte can be additionally supplied. More particularly, provided is a secondary battery including an electrode assembly that includes a positive electrode, a negative electrode, and a separator disposed between the positive electrode and the negative electrode, and a porous elastic body that can contain an electrolyte, which are installed in a battery case.

Abstract: Disclosed herein are a positive electrode active material including at least one selected from among compounds represented by Formula 1 below and a lithium secondary battery including the same that is capable of improving lifetime characteristics and rate characteristics while exhibiting excellent safety: xLi2MyMn(1-y)O3-zAz*(1?x)LiM?O2-z?A?z? (1), where M is at least one element selected from a group consisting of Ru, Mo, Nb, Te, Re, Ir, Pt, Cr, S, W, Os, and Po, M? is at least one element selected from a group consisting of Ni, Ti, Co, Al, Mn, Fe, Mg, B, Cr, Zr, Zn, and second row transition metals, A and A? are each independently a negative monovalent or divalent anion, and 0<x<1, 0.3<y<1, 0?z<0.5, and 0?z?<0.5.

Abstract: Disclosed is a lithium secondary battery including an electrolyte, an electrode laminate, a battery case including a space part in which the electrolyte and the electrode laminate are embedded, and a sealing part surrounding the space part, and a gas permeable membrane.

Abstract: Disclosed is an electrode including a current collector and an electrode material layer formed on the current collector, the electrode material layer including a first electrode material layer and second electrode material layer having different electrode active materials.

Abstract: Disclosed is a method of manufacturing a lithium secondary battery including a positive electrode active material, wherein the positive electrode active material includes one or more lithium transition metal oxides selected from compounds represented by Formula 1 defined in claim 1, and activation of the lithium secondary battery is conducted while changing charge/discharge voltage ranges and number of cycles depending on doping amount of M1 in Formula 1.