Abstract: The present disclosure relates to a positive active material for a lithium rechargeable battery, a manufacturing method thereof, and a lithium rechargeable battery including the positive active material, and it provides a positive active material which is a lithium composite metal oxide including nickel, cobalt, and manganese, and either has orientation in a direction of with respect to an ND axis that is equal to or greater than 29% or has orientation in a direction of [120]+[210] with respect to an RD axis that is equal to or greater than 82% in the case of an EBSD analysis with a misorientation angle (?g) that is equal to or less than 30 degrees.

Abstract: The present exemplary embodiments provide a positive electrode active material, a manufacturing method thereof, and a lithium secondary battery including the same. The positive electrode active material according to an exemplary embodiment is a metal oxide particle including a center and a surface portion positioned on the surface of the center, but the metal oxide particle is composed of a single particle, and the surface portion includes a film in which no peak is observed during XRD measurement.

Abstract: The present exemplary embodiments relate to a positive electrode active material and a lithium secondary battery including the same. According to an exemplary embodiment, a positive electrode active material for a lithium secondary battery including a metal oxide particle including nickel, cobalt, manganese and aluminum, and two types of doping elements doped on the metal oxide particle is provided.

Abstract: According to the exemplary embodiments of the present invention, there is provided a blockchain based authentication and transaction system including a user DID (Distributed Identity) wallet which is an application program installed on a user's mobile terminal. Here, the user DID wallet allows a user to ascertain whether a counterpart is a legitimate party by verifying a counterpart's VP and expressing the verified counterpart ascertainment information to the user on a screen when the counterpart's VP provided from a counterpart system which is an authentication or transaction counterpart is obtained.

Abstract: It relates to a positive electrode active material for a lithium secondary battery and a lithium secondary battery including the same, wherein the positive electrode active material for lithium secondary battery, comprising: a core containing a lithium nickel-based compound having a Ni content of 80 mol % or more; and a coating material positioned on at least a portion of the core surface; wherein, the coating material includes a first coating material containing at least one of group 5 elements and group 6 elements; and S; and a second coating material including B, LiOH, Li2CO3 and Li2SO4, and the second coating material is a needle-like material.

Abstract: The present invention relates to a positive active material for lithium secondary battery, its manufacturing method, and lithium secondary battery including the same, and it provides that a positive active material for lithium secondary battery, comprising: a core and a coating layer, wherein, the core is lithium metal oxide, the coating layer comprises boron, the boron compound in the coating layer comprises a lithium boron oxide and a boron oxide, the lithium boron oxide is included 70 wt % or more and 99 wt % in the entire coating layer, the lithium boron oxide comprises Li2B4O7, with respect to the lithium boron oxide 100 wt %, the content of Li2B4O7 is 55 wt % or more and 99 wt % or less.

Abstract: A positive electrode active material for a lithium secondary battery comprising a compound represented by Chemical Formula 1 is introduced. Li1+mNi1-w-x-y-zCowMnxM1yM2zO2-pXp??[Chemical Formula 1] (In the Chemical Formula 1, M1 and M2 are different from each other, and any one element selected from the group consisting of Al, Mg, Zr, Sn, Ca, Ge, Ti, Cr, Fe, Zn, Y, Ba, La, Ce, Sm, Gd, Yb, Sr, Cu and Ga respectively, X is any one element selected from the group consisting of F, N, S, and P, w, x, y, z, p and m are respectively 0.125<w<0.202, 0.153<x<0.225, 0?y?0.1, 0?z?0.1, 0.34?w+x?0.36, 0?p?0.1, and ?0.1?m?0.2.

Abstract: The present exemplary embodiments relate to a positive electrode active material and a lithium secondary battery including the same. The positive active material for a lithium secondary battery according to an exemplary embodiment includes lithium metal oxide particles including lithium, nickel, cobalt, manganese and doping elements, and includes a first domain and a second domain inside the lithium metal oxide particles.

Abstract: The present exemplary embodiments relate to a positive electrode active material, a manufacturing method thereof, and a lithium secondary battery including the same. A positive active material for a lithium secondary battery according to an exemplary embodiment is a lithium metal oxide particle in the form of secondary particles including a plurality of primary particles: a first coating layer positioned on at least a part of the surface of the primary particle, and a second coating layer positioned over at least a portion of the secondary particle surface, the first coating layer comprising a first niobium compound, the second coating layer comprising the first niobium compound and a second niobium compound having a composition different from the first niobium compound.

Abstract: Embodiments of the present invention relate to a cathode active material, a method for manufacturing the same, and a lithium secondary battery including the same. According to an embodiment, a cathode active material can be provided, the cathode active material comprising: a lithium metal oxide including a core and a shell disposed on a surface of the core; and a coating layer disposed on a surface of the lithium metal oxide, wherein a c value that satisfies Equation 1 and is in a range of 0.3 to 0.7, and the core and the shell have a layered crystalline structure.

Abstract: Provided are a positive electrode active material for a lithium secondary battery, a method of preparing the same, and a lithium secondary battery including the same. According to an exemplary embodiment, a positive electrode active material for a lithium secondary battery which includes lithium metal oxide particles and a coating layer placed on at least a part of a surface of the lithium metal oxide particles may be provided, wherein the coating layer includes B, LiOH, Li2CO3, and Li2SO4.

Abstract: A positive active material for a lithium secondary battery and a lithium secondary battery including the same are provided, wherein the positive active material includes lithium, nickel, cobalt, manganese, and a doping element, and the doping element may include Zr, Al, and Ti.

Abstract: The present invention relates to an all-solid-state battery and a manufacturing method thereof. An all-solid-state battery according to an embodiment of the present invention includes: a positive electrode positioned on a positive electrode current collector; a negative electrode positioned on a negative electrode current collector; and a solid-state electrolyte layer positioned between the positive electrode and the negative electrode, wherein the positive electrode includes a positive electrode active material and a solid-state electrolyte, and concentrations of the positive electrode active material and the solid-state electrolyte have a stepwise concentration gradient in which the concentration of the positive electrode active material to the solid-state electrolyte decreases from a side closer to the positive electrode current collector toward a side closer to the solid-state electrolyte layer.

Abstract: The present disclosure relates to a positive electrode active material for lithium secondary battery comprising a first compound represented by Chemical Formula 1, and a second compound represented by Chemical Formula 2, wherein, a content of the first compound is 65 wt % or more based on 100 wt % of the positive electrode active material, and a lithium secondary battery comprising the same. Lia1Nib1Coc1Mnd1N1e1M2f1O2-f1 ??[Chemical Formula 1] Lia2Nib2Coc2Mnd2M3e2M4f2O2-f2 ??[Chemical Formula 2] wherein, each composition and molar ratio of Chemical Formulas 1 and 2 are as defined in the specification.

Abstract: A positive active material, a manufacturing method thereof, and a lithium secondary battery including the same are disclosed, and a positive active material including lithium metal oxide particles in a secondary particle form including primary particles, wherein the secondary particle surface includes planar primary particles with a narrow angle of 70 to 90° from among angles between a c axis of the primary particles and a straight line connecting a virtual point of a center of the primary particle and a center point of the secondary particle may be provided.

Abstract: The present invention provides a cathode active material for a lithium secondary battery comprising secondary particles in which primary particles represented by Chemical Formula 1 below are aggregated, wherein the average particle size (D50) of the secondary particles is 2.5 ?m or more and 7 ?m or less, and the average value of the sphericity coefficient, which is the ratio (l/w) of the long axis length (l) to the short axis length (w) of the secondary particles, is 1.0 to 1.25.

Abstract: The present disclosure relates to a cathode active material for a lithium secondary battery, a preparation method therefor, and a lithium secondary battery comprising same, and the cathode active material includes a lithium nickel cobalt manganese-based oxide represented by Chemical Formula 1 including secondary particles obtained by agglomerating at least one primary particle, and a metal oxide particles having a nano-sized average diameter (D50) and disposed inside the secondary particles. Lia[NixCoyMnz]tM1-tO2-pXp.

Abstract: The present disclosure relates to a positive active material for a lithium rechargeable battery and a lithium rechargeable battery including the same, which include a first compound represented by Chemical Formula 1 and a second compound represented by Chemical Formula 2, and a content of the first compound is 65 wt % or more based of the positive active material of 100 wt %. Lia1Nib1Coc1Mnd1M1e1M2f1O2-f1 ??[Chemical Formula 1] Lia2Nib2Coc2Mnd2M3e2M4f2O2-f2 ??[Chemical Formula 2] Chemical Composition 1 and 2 of each composition and molar ratio is as defined in the specification. Each composition and molar ratio of Chemical Formula 1 and 2 is as defined in the specification.

Abstract: The present disclosure relates to a positive active material for a lithium rechargeable battery, a manufacturing method thereof, and a lithium rechargeable battery including the positive active material, and it provides a positive active material which is a lithium composite metal oxide including nickel, cobalt, and manganese, and either has orientation in a direction of [001] with respect to an ND axis that is equal to or greater than 29% or has orientation in a direction of [120]+[210] with respect to an RD axis that is equal to or greater than 82% in the case of an EBSD analysis with a misorientation angle (?g) that is equal to or less than 30 degrees.

Abstract: The present invention relates to a positive active material for lithium secondary battery, its manufacturing method, and lithium secondary battery including the same, and it provides that a positive active material for lithium secondary battery, comprising: a core and a coating layer, wherein, the core is lithium metal oxide, the coating layer comprises boron, the boron compound in the coating layer comprises a lithium boron oxide and a boron oxide, the lithium boron oxide is included 70 wt % or more and 99 wt % in the entire coating layer, the lithium boron oxide comprises Li2B4O7, with respect to the lithium boron oxide 100 wt %, the content of Li2B4O7 is 55 wt % or more and 99 wt % or less.