Abstract: Provided are an electrolyte for a secondary battery including a lithium salt, a nonaqueous organic solvent, and a bisfluorophosphite multicyclic compound, and a lithium secondary battery including the electrolyte.

Abstract: Provided is an electrolyte for a secondary battery including a lithium salt, a nonaqueous organic solvent, and a cyclic phosphate compound, and a lithium secondary battery including the electrolyte.

Abstract: Provided is an electrolyte for a secondary battery including a lithium salt, a nonaqueous organic solvent, and a cyclic phosphate compound represented by the following Chemical Formula 2: wherein R1 to R6 and R? and R? are independently of one another hydrogen or C1-C7 alkyl; L2 is —(CR7R8)n—; R7 and R8 are independently of each other hydrogen or C1-C7 alkyl; and n is an integer of 1 to 3. Also provided is a lithium secondary battery including the electrolyte.

Abstract: A lubricant composition includes a base oil, a phenothiazine-based polymerization inhibitor, and a polymerization inhibitory accelerator including a hindered phenol-based compound and a hydroquinone-based compound. A self-polymerization in a polymerizing process is suppressed by an interaction between the polymerization inhibitor and the polymerization inhibitory accelerator. A method of preparing a copolymer using the lubricant composition is also provided.

Abstract: The present invention relates to a heteroatom ligand, an oligomerization catalyst containing the same, and a method for preparing an oligomer by using the same. Specifically, the present invention relates to a heteroatom ligand having a silsesquioxane derivative, an oligomerization catalyst containing the same, and a method for preparing an oligomer by using the same.

Abstract: The present invention relates to a heteroatom ligand, an oligomerization catalyst containing the same, and a method for preparing an oligomer by using the same. Specifically, the present invention relates to a heteroatom ligand having a silsesquioxane derivative, an oligomerization catalyst containing the same, and a method for preparing an oligomer by using the same.

Abstract: A lubricant composition includes a base oil, a phenothiazine-based polymerization inhibitor, and a polymerization inhibitory accelerator including a hindered phenol-based compound and a hydroquinone-based compound. A self-polymerization in a polymerizing process is suppressed by an interaction between the polymerization inhibitor and the polymerization inhibitory accelerator. A method of preparing a copolymer using the lubricant composition is also provided.

Abstract: Provided is a lithium secondary battery including: a cathode including a cathode current collector and a cathode active material layer positioned on the cathode current collector; a nonaqueous electrolyte; and an anode, wherein the cathode active material layer includes a lithium transition metal oxide particle, and the lithium transition metal oxide particle contains a nickel (Ni) atom in an amount of 60 mol % or more with respect to a total of 100 mol % of transition metal atoms, and the nonaqueous electrolyte contains a polyethylene glycol-based polymer.

Abstract: Provided are an electrolyte for a secondary battery including a lithium salt, a nonaqueous organic solvent, and a cyclic fluorophosphonate compound, and a lithium secondary battery including the same.

Abstract: Provided is an electrolyte for a secondary battery including a lithium salt, a nonaqueous organic solvent, and a cyclic phosphate compound, and a lithium secondary battery including the electrolyte.

Abstract: Provided are an electrolyte for a secondary battery including a lithium salt, a nonaqueous organic solvent, and a bisfluorophosphite multicyclic compound, and a lithium secondary battery including the electrolyte.

Abstract: Provided is a lithium secondary battery. The lithium secondary battery of the present invention uses an electrolyte including the following compound, and a cathode active material including at least one metal of which a concentration at a central portion of the lithium-metal oxide particle is different from that at a surface portion of the lithium-metal oxide particle, and has improved lifetime characteristics and high temperature storage characteristics: wherein R1 is hydrogen or C1-C4alkyl, R2 to R4 are each independently hydrogen, C1-C4alkyl, or -OPF2, a, b, and c are each independently an integer of 0 to 4, and d is an integer of 1 to 3, and when a, b, and c are 2 or more, R2 to R4 may be identical to or different from each other.