Abstract: A positive electrode material, a positive electrode including the same, a lithium battery including the same, and a method of preparing the same are disclosed herein. In some embodiments, a method of preparing a positive electrode active material including forming a first coating layer on a surface of a lithium transition metal oxide represented by Formula 1 using a basic aqueous solution containing a coating element M1 (where M1 includes at least one selected from sodium (Na) and aluminum (Al)), dry-mixing the lithium transition metal oxide having the first coating layer formed on a surface thereof, and a raw material containing a coating element M2 (where M2 includes boron (B)) and heat treating the mixture to form a second coating layer.

Abstract: A positive electrode active material for a lithium secondary battery includes a lithium transition metal oxide containing nickel, cobalt, and manganese and a cobalt-containing coating layer. The lithium transition metal oxide is in the form of a secondary particle in which primary particles are aggregated. The coating layer is formed at interface between the primary particles positioned on the surface and inside of the lithium transition metal oxide secondary particle. A spectrum measured for the lithium transition metal by TEM-EELS includes a first peak in a region from a surface of a primary particle in a surface portion of the secondary particle to a depth of 50 nm, and a second peak in a region from the surface of a primary particle in a core portion of secondary particle to a depth of 50 nm.

Abstract: Provided is a lithium secondary battery which includes a positive electrode, a negative electrode, a separator interposed between the positive electrode and the negative electrode, and an electrolyte, wherein the positive electrode includes a lithium composite transition metal oxide powder having a layered structure and a nickel content accounting for 85 atm % or more of total transition metals, and wherein the lithium composite transition metal oxide powder undergoes a 3% or less change in lithium-oxygen (Li—O) interlayer spacing in a state-of-charge (SOC) range of 58% to 72%.

Abstract: A positive electrode active material includes a lithium composite transition metal oxide. The positive electrode active material is a secondary particle in which primary particles are aggregated. The primary particle includes a coating portion containing an M1 metal, and the coating portion is locally present on surfaces of the primary particles or at inter-particle boundaries of the primary particles. A preparation method thereof, and a lithium secondary battery including the positive electrode active material are also provided.

Abstract: A positive electrode material has a bimodal particle size distribution which includes a first positive electrode active material and a second positive electrode active material having different average particle diameters (D50) from each other. The first positive electrode active material includes a lithium composite transition metal oxide. The number of primary particles of the first positive electrode active material is from 6 to 30, which is measured in a cross-sectional SEM image of secondary particles having an average particle diameter (D50), wherein the average particle diameter (D50) is a particle diameter measured through a laser diffraction particle size measurement instrument at which a maximum peak of a cumulative area particle size distribution of the first positive electrode active material appears. A preparation method thereof, and a lithium secondary battery including the positive electrode material are also provided.

Abstract: The present invention provides a positive electrode active material capable of achieving a battery having excellent capacity characteristics and life characteristics. The positive electrode active material includes a first lithium transition metal oxide and a second lithium transition metal oxide having an average particle diameter (D50) smaller than that of the first lithium transition metal oxide, wherein a particle strength of the first lithium transition metal oxide is 140 MPa or more, and a difference in particle strengths between the first lithium transition metal oxide and the second lithium transition metal oxide is 10 MPa or less. The present invention further provides a positive electrode and a lithium secondary battery which include the positive electrode active material.

Abstract: A positive electrode active material and a method of making the same, a positive electrode including the same, and a lithium secondary battery including the same are disclosed herein. In some embodiments, a method includes (A) sintering a mixture of a positive electrode active material precursor containing 70 mol % or more of nickel (Ni), based on a total amount of metals in the precursor, and a lithium-containing raw material to prepare a pre sintered product, (B) sintering a mixture of the pre-sintered product and an aluminum-containing raw material in an oxygen atmosphere containing 20 vol % to 100 vol % of oxygen to prepare a lithium transition metal oxide, wherein a concentration of oxygen is reduced according to sintering time, and (c) heat treating a mixture of the lithium transition metal oxide and a boron-containing raw material to form a coating layer on the lithium metal oxide.

Abstract: A method of preparing a positive electrode active material, a positive electrode and a lithium battery including a positive electrode active material prepared by the same are disclosed herein. In some embodiments a method includes (A) sintering on a mixture of a positive electrode active material precursor and a lithium-containing raw material to prepare a pre-sintered product, (B) sintering a mixture of the pre-sintered product and an aluminum-containing raw material to prepare a lithium transition metal oxide, and (C) heating treating a dry mixture of the lithium transition metal oxide and a boron-containing raw material to form a coating layer.

Abstract: A positive electrode active material includes a lithium composite transition metal oxide represented by Formula 1 described in the present specification and satisfies Equation (1) described in the present specification, wherein an average particle diameter D50 of a secondary particle is in a range of 1 µm to 8 µm. A method of preparing the same, and a positive electrode material including the same are also provided.

Abstract: A positive electrode active material for a lithium secondary battery and a method for manufacturing the same are disclosed herein. In some embodiments, a positive electrode active material comprises a positive electrode active material powder and a coating layer on a surface of the positive electrode active material powder, where the coating layer comprising a lithium molybdenum compound. The positive electrode active material may improve output and stability in a lithium secondary battery.

Abstract: A positive electrode material, a positive electrode including the same, a lithium battery including the same, and a method of preparing the same are disclosed herein. In some embodiments, a method of preparing a positive electrode active material including forming a first coating layer on a surface of a lithium transition metal oxide represented by Formula 1 using a basic aqueous solution containing a coating element M1 (where M1 includes at least one selected from sodium (Na) and aluminum (Al)), dry-mixing the lithium transition metal oxide having the first coating layer formed on a surface thereof, and a raw material containing a coating element M2 (where M2 includes boron (B)) and heat treating the mixture to form a second coating layer.

Abstract: A positive electrode active material for a secondary battery and a method of making the same are disclosed herein. In some embodiments, a positive electrode active material includes lithium composite transition metal oxide particles including 70 mol % or more of nickel (Ni) among total metals excluding lithium, and a coating portion formed on surfaces of the lithium composite transition metal oxide particles, wherein the coating portion includes a compound including fluorine and at least one selected from the group consisting of aluminum (Al), titanium (Ti), magnesium (Mg), zirconium (Zr), tungsten (W), and strontium (Sr), wherein the positive electrode active material has a Brunauer-Emmett-Teller (BET) specific surface area is in a range of 0.1 m2/g to 0.9 m2/g, and an amount of a lithium by-product on a surface of the positive electrode active material is 0.65 wt % or less based on a total weight of the positive electrode active material.

Abstract: Provided is a lithium secondary battery which includes a positive electrode, a negative electrode, a separator interposed between the positive electrode and the negative electrode, and an electrolyte, wherein the positive electrode includes a lithium composite transition metal oxide powder having a layered structure and a nickel content accounting for 85 atm % or more of total transition metals, and wherein the lithium composite transition metal oxide powder undergoes a 3% or less change in lithium-oxygen (Li—O) interlayer spacing in a state-of-charge (SOC) range of 58% to 72%.

Abstract: Provided are a cosmetic composition for anti-aging or alleviating skin redness, and a medicinal composition for treating and preventing skin inflammatory diseases caused by light, containing a compound inducing an increase in expression of adiponectin or a pharmaceutically acceptable salt thereof.

Abstract: Provided are a cosmetic composition for anti-aging or alleviating skin redness, and a medicinal composition for treating and preventing skin inflammatory diseases caused by light, containing a compound inducing an increase in expression of adiponectin or a pharmaceutically acceptable salt thereof.

Abstract: Provided are a composition having anti-oxidant, anti-aging, and autophagy activities to thereby be useful for preventing, alleviating, or treating age-related metabolic diseases including neurodegenerative diseases or type 2 diabetes, and uses thereof.

Abstract: Provided is Youngia denticulata extract being effective for prevention and treatment of diseases caused by an environmental pollution substance, and capable of protecting cell damage.

Abstract: The present invention relates to a peptide analog or a pharmaceutically acceptable salt thereof with excellent moisturizing effect, and use thereof for moisturization. More specifically, the present invention relates to a novel peptide analog or a pharmaceutically acceptable salt thereof, a method for preparation thereof, a moisturizing cosmetic composition comprising the same as an active ingredient, and a pharmaceutical composition for prevention and treatment of xeroderma.

Abstract: The present invention relates to a biotin-conjugated hexapeptide-2 derivative or a pharmaceutically acceptable salt thereof and use thereof. More particularly, the present invention relates to a biotin-conjugated hexapeptide-2 derivative or a pharmaceutically acceptable salt thereof, a preparation method thereof, a composition including the same as an active ingredient, and a method for improving wrinkles and inhibiting skin aging using the same.

Abstract: A controlled-release composition and controlled-release microspheres containing an exendin as an active ingredient, and a method of preparing the same are provided. More specifically, a controlled-release composition containing an exendin as an active ingredient, a biodegradable polymer with a specific viscosity, and coating materials, having high bioavailability and showing sustained release of the active ingredient in an effective concentration for a certain period without an excessive initial burst of the active ingredient; controlled-release microspheres containing a core including an exendin as an active ingredient and a biodegradable polymer, and a coating layer coating the core; and a method of preparing controlled-release microspheres including the steps of mixing an exendin, a biodegradable polymer, and a solvent, removing the solvent from the mixture to prepare hardened microspheres, and coating the hardened microspheres to form a coating layer on the surface of each microsphere, are provided.