Abstract: A positive active material for a lithium secondary battery according to an exemplary embodiment includes a lithium composite transition metal oxide and a surface layer formed on a particle surface of the lithium composite transition metal oxide, and a content of nickel (Ni) in the lithium composite transition metal oxide. is more than 0.85 mol, the surface layer contains cobalt (Co) and aluminum (Al), and in the surface layer, the distribution of the cobalt (Co) and aluminum (Al) components have different concentration gradients.

Abstract: Provided are a positive active material for a lithium secondary battery, a positive electrode including the same, and a lithium secondary battery including the same, the positive active material for lithium secondary batteries including a first metal oxide, which includes nickel, cobalt and manganese, being in single particle form; and a second metal oxide that contains nickel, cobalt, and manganese and is in the form of a secondary particle containing a plurality of primary particles and has an average particle diameter D50 larger than that of the first metal oxide; wherein, a nickel content of the second metal oxide is 0.8 mol or more, based on 1 mole of the total of nickel, cobalt and manganese in the second metal oxide, and a nickel content of the first metal oxide is 0.03 mole to 0.17 mole more than the nickel content of the second metal oxide.

Abstract: The present exemplary embodiments relate to a positive electrode active material, its manufacturing method, 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 metal oxide particle comprising a central portion and a surface portion located on the surface of the central portion, wherein, the metal oxide particle includes nickel, cobalt, manganese, and doping elements and is composed of a single particle, and the metal oxide particle includes a crystal phase of layered structure belonging to the R-3m space group on the surface, and an average grain size is 1550 ? or more.

Abstract: In an aspect, a positive active material for a rechargeable lithium battery including overlithiated layered oxide (OLO), a method of preparing the same, and a positive electrode for a rechargeable lithium battery and a rechargeable lithium battery including the same is disclosed.

Abstract: A positive active material, a method of preparing the same, and a lithium battery including the positive active material, the positive active material including a core, the core including an overlithiated lithium transition metal oxide; and a coating layer on the core, the coating layer including Li3VO4.

Abstract: A positive active material, a method of preparing the same, and a lithium battery including the positive active material, the positive active material including a core, the core including an overlithiated lithium transition metal oxide; and a coating layer on the core, the coating layer including Li3VO4.

Abstract: In an aspect, a positive active material for a rechargeable lithium battery including overlithiated layered oxide (OLO), a method of preparing the same, and a positive electrode for a rechargeable lithium battery and a rechargeable lithium battery including the same is disclosed.

Abstract: The present invention relates to a plasticizer composition containing cyclodextrin derivatives, a flexible PVC composition with suppression of the migration of plasticizer containing this plasticizer composition, and a manufacturing method of the PVC composition. The manufacturing method includes the steps of: (S1) preparing a cyclodextrin derivative, in which hydrogens of a cyclodextrin are substituted with a certain compound; (S2) mixing the cyclodextrin derivative, PVC and a low molecular weight liquid plasticizer to form a plastisol; and (S3) heating the plastisol into liquid and cooling the plastisol. This manufacturing method uses cyclodextrin derivatives, in which cyclodextrins are modified with certain compounds, and these derivatives form a complex with the low molecular weight liquid plasticizer to suppress plasticizer migration. Thus, this method thereby allows mass-production of the flexible PVC with suppressed plasticizer migration in a simple and economical manner without using a solvent.