Abstract: The present invention provides a positive electrode active material for a secondary battery which includes a lithium transition metal oxide, wherein the positive electrode active material has three peaks in a differential graph (ERC curve) obtained by differentiating a pH value against an amount of acid (HCl) added, which is obtained by pH titration of 10 g of the lithium transition metal oxide using 0.5 M HCl, wherein a y-axis (dpH/dml) value of a first peak at the smallest x-axis value among the three peaks is ?1.0 or less.

Abstract: The present invention provides a positive electrode active material for a secondary battery, which includes a lithium transition metal oxide including nickel (Ni) and cobalt (Co), and at least one selected from the group consisting of aluminum (Al), manganese (Mn), and a combination thereof. The lithium transition metal oxide is characterized in that the content of nickel (Ni) in the total transition metal elements is 80 mol % or more, and the cation mixing ratio of Ni cations in a lithium layer in the lithium transition metal oxide structure is 1.1% or less.

Abstract: A surface of a LiCoO2-based positive electrode active material to have a rock salt crystal structure is provided. Specifically, a positive electrode active material for a lithium rechargeable battery is provided, including: a core particle containing lithium cobalt oxide doped with aluminum (Al); and a coating layer positioned on a surface of the core particle and containing a cobalt(Co)-based compound having a rock salt crystal structure. A method of producing the positive electrode active material is also provided using a solid-phase method. The positive electrode active material can be applied to a positive electrode, lithium rechargeable battery, battery module, battery pack, and the like.

Abstract: A negative electrode includes a negative electrode active material layer, wherein the negative electrode active material layer includes a negative electrode active material and a conductive material. The negative electrode active material includes SiOx (0?x<2) particles and the conductive material includes secondary particles in which a portion of one graphene sheet is connected to a portion of an adjacent graphene sheet and a carbon nanotube structure in which 2 to 5,000 single-walled carbon nanotube units are coupled to each other, wherein the oxygen content of the secondary particles is 1 wt % to 10 wt % based on the total weight of the secondary particles, the specific surface area of the secondary particles measured by a nitrogen adsorption BET method is 500 m2/g to 1100 m2/g, and the carbon nanotube structure is included in the negative electrode active material layer in an amount of an 0.01 wt % to 1.0 wt %.

Abstract: The present invention relates to an electrode and a secondary battery including the same, the electrode including an electrode active material layer, wherein: the electrode active material layer includes an electrode active material, a hydrogenated nitrile butadiene rubber, and a conductive agent; the conductive agent includes a carbon nanotube structure in which 2 to 5,000 single-walled carbon nanotube units are bonded; and the carbon nanotube structure is included in the electrode active material layer in an amount of 0.01-0.5 wt %.

Abstract: The present disclosure provides a positive electrode active material for a secondary battery, comprising: a lithium nickel-based oxide doped with a doping element (M?), wherein the doping element (M?) is at least one selected from the group consisting of titanium (Ti) and magnesium (Mg), wherein when the doping element (M?) is Ti, the doping content of Ti is 3000 ppm to 5000 ppm based on the total amount of the lithium nickel-based oxide excluding the doping element, wherein when the doping element (M?) is Mg, the doping content of Mg is 500 ppm to 5000 ppm based on the total amount of the lithium nickel-based oxide excluding the doping element, and wherein when the doping element (M?) is Ti and Mg, the total doping content of Ti and Mg is 3500 ppm to 5000 ppm based on the total amount of the lithium nickel oxide excluding the doping elements.

Abstract: A lithium cobalt-based positive electrode active material is provide, which includes sodium and calcium, wherein the total amount of the sodium and calcium is 150 ppm to 500 ppm based on the total weight of the lithium cobalt-based positive electrode active material. A method for preparing the lithium cobalt-based positive electrode active material is also provided.

Abstract: The present invention relates to a cathode additive, a method for preparing the same, and a cathode and a lithium secondary battery including the same. More specifically, one embodiment of the present invention provides a cathode additive that can offset an irreversible capacity imbalance, increase the initial charge capacity of a cathode, and simultaneously inhibit the generation of gas in a battery.

Abstract: A negative electrode active material for a secondary battery and a lithium secondary battery including the same. The negative electrode active material for a secondary battery, includes lithium titanium-based composite particles comprising: a lithium titanium oxide represented by LixTiyOz, wherein x, y and z satisfy 0.1?x?4, 1?y?5 and 2?z?12, Zr doped into the lithium titanium oxide; and an aluminum and sulfur containing compound coated on a surface of the lithium titanium oxide. The aluminum and sulfur containing compound is present in an amount of 0.4 mM to 0.9 mM based on 1M lithium titanium oxide.

Abstract: Disclosed are a lithium transition metal oxide and a lithium secondary battery, in which a ratio of average particle diameter D50 of the lithium transition metal oxide to average particle diameter D50 of a transition metal precursor for preparation of the lithium transition metal oxide satisfies the condition represented by Equation 3 below: 0 < Average ? ? particle ? ? diameter ? ? D ? ? 50 ? ? of ? ? lithium ? ? transition ? metal ? ? oxide Average ? ? particle ? ? diameter ? ? D ? ? 50 ? ? of ? ? transition ? ? metal ? precursor < 1.2 .

Abstract: The present invention relates to a carbon nanotube having an La(100) of less than 7.0 nm when measured by XRD and a specific surface area of 100 m2/g to 196 m2/g, and an electrode and a secondary battery including the carbon nanotube.

Abstract: A negative electrode active material for a secondary battery, including lithium titanium-based composite particles comprising: a lithium titanium oxide represented by LixTiyOz, wherein x, y and z satisfy 0.1?x?4, 1?y?5 and 2?z?12; Zr doped into the lithium titanium oxide; and an aluminum and sulfur containing compound coated on a surface of the lithium titanium oxide. The lithium titanium-based composite particles include at least one of primary particles or secondary particles formed by agglomeration of the primary particles, and an average particle size of the primary particles of the lithium titanium-based composite particles is in a range of 550 nm to 1.1 ?m.

Abstract: The present invention provides a positive electrode active material for a secondary battery, which includes a lithium transition metal oxide including nickel (Ni) and cobalt (Co), and at least one selected from the group consisting of aluminum (Al), manganese (Mn), and a combination thereof. The lithium transition metal oxide is characterized in that the content of nickel (Ni) in the total transition metal elements is 80 mol % or more, and the cation mixing ratio of Ni cations in a lithium layer in the lithium transition metal oxide structure is 1.1% or less.

Abstract: A positive electrode active material includes a lithium-rich lithium manganese-based oxide, wherein the lithium-rich lithium manganese-based oxide is represented by the following chemical formula (1), Li1+aNixCoyMnzMvO2-bAb??(1) wherein, 0<a?0.2, 0<x?0.4, 0<y?0.4, 0.5?z?0.9, 0?v?0.2, a+x+y+z+v=1, and 0?b?0.5; M is one or more elements selected from the group consisting of Al, Zr, Zn, Ti, Mg, Ga, In, Ru, Nb, and Sn; and A is one or more elements selected from the group consisting of P, N, F, S and Cl; wherein (i) lithium tungsten (W) compound, or the (i) lithium tungsten (W) compound and (ii) tungsten (W) compound are contained on the lithium-rich lithium manganese-based oxide; in an amount of 0.1% to 7% by weight based on the total weight of the positive electrode active material, wherein the (i) lithium tungsten (W) compound includes a composite of the (ii) tungsten (W) compound and a lithium.

Abstract: A positive electrode material and a positive electrode and a lithium secondary battery including the same are provided. The positive electrode material having a bimodal particle size distribution which includes large-diameter particles and small-diameter particles having different average particle diameters (D50), wherein the large-diameter particles are lithium composite transition metal oxide having a nickel content of 80 atm % or more in all transition metals thereof, and the small-diameter particles are a lithium composite transition metal oxide including nickel, cobalt, and aluminum, having a nickel content of 80 atm % to 85 atm % in all transition metals, and having an atomic ratio of the cobalt to the aluminum (Co/Al) of 1.5 to 5.

Abstract: A positive electrode active material contains a lithium-rich lithium manganese-based oxide represented by chemical formula (1), Li1+aNixCoyMnzMvO2?bAb??(1) wherein, 0<a?0.2, 0<x?0.4, 0<y?0.4, 0.5?z?0.9, 0?v?0.2, a+x+y+z+v=1, and 0?b?0.5; M is one or more elements selected from the group consisting of Al, Zr, Zn, Ti, Mg, Ga, In, Ru, Nb, and Sn; and A is one or more elements selected from the group consisting of P, N, F, S and Cl; and a coating layer formed on a surface of the lithium-rich lithium manganese-based oxide, wherein the coating layer contains a lithium-deficient transition metal oxide in a lithium-deficient state having a molar ratio of lithium to transition metal of less than 1 is formed on the surface of the lithium-rich lithium manganese-based oxide, and wherein the content of the coating layer is 1% to 10% by weight based on the total weight of the positive electrode active material.

Abstract: The present disclosure relates to a positive electrode material including a spinel-structured lithium manganese-based first positive electrode active material and a lithium nickel-manganese-cobalt-based second positive electrode active material, wherein the first positive electrode active material includes a lithium manganese oxide represented by Formula 1 and a coating layer which is disposed on a surface of the lithium manganese oxide, the second positive electrode active material is represented by Formula 2, and an average particle diameter of the second positive electrode active material is greater than an average particle diameter of the first positive electrode active material, and a positive electrode and a lithium secondary battery which include the positive electrode material: Li1+aMn2?bM1bO4?cAc??[Formula 1] Li1+x[NiyCozMnwM2v]O2?pBp??[Formula 2]

Abstract: A method of preparing an octahedral-structured lithium manganese-based positive electrode active material includes mixing a manganese raw material, a raw material including doping element M1, wherein the doping element M1 is at least one element selected from the group consisting of Mg, Al, Li, Zn, B, W, Ni, Co, Fe, Cr, V, Ru, Cu, Cd, Ag, Y, Sc, Ga, In, As, Sb, Pt, Au, and Si, and a lithium raw material and sintering the mixture in an oxygen atmosphere to prepare a lithium manganese oxide having an octahedral structure and doped with the doping element M1, wherein the sintering includes performing first sintering at 400° C. to 700° C. for 3 hours to 10 hours and performing second sintering at 700° C. to 900° C. for 10 hours to 20 hours. Also provided is an octahedral-structured lithium manganese-based positive electrode active material prepared by the above preparation method.

Abstract: Disclosed herein are a method of manufacturing a sulfide-based all-solid-state battery, and a sulfide-based all-solid-state battery manufactured thereby, wherein the battery includes a surface heat-treated positive electrode active material, which is simply performed by heating a positive electrode active material at 400° C. to 600° C. in an inert gas state, as a low-cost method of uniformly treating the surface of a positive electrode active material such that the positive electrode active material does not react with a sulfide-based solid electrolyte.

Abstract: Disclosed herein are a sulfide-based all-solid-state battery and a method of manufacturing the same, wherein the sulfide-based all-solid-state battery includes a positive electrode active material coated with a lithium niobate precursor, which is manufactured by a polyol process having low production cost, such that it improves safety and increases capacity of the sulfide-based all-solid-state battery.