Abstract: The present invention relates to a positive electrode active material for a lithium secondary battery and a lithium secondary battery including the same. The positive electrode active material according to the present invention reduces the specific surface area and grain boundary of a secondary particle in which a side reaction with an electrolyte solution occurs to improve the high-temperature stability of the positive electrode active material and reduce gas generation caused by the positive electrode active material.

Abstract: The present invention relates to a lithium metal complex oxide and a preparation method thereof, and more particularly, to a lithium metal complex oxide mixed with a metal compound for a lithium reaction, stirred and heat-treated to allow residual lithium and a metal compound for reducing lithium (or a metal compound for lithium reduction) to react with each other on a surface to form a product, which is included in the lithium metal complex oxide, in which the content of Ni3+ is higher than the content of Ni2+ and a ratio of Ni3+/Ni2+ is 1.5 or greater so that life characteristics and capacity characteristics are improved, while residual lithium is reduced, and a preparation method thereof.

Abstract: The present invention relates to a lithium metal complex oxide and a preparation method thereof, and more particularly, to a lithium metal complex oxide mixed with a metal compound for a lithium reaction, stirred and heat-treated to allow residual lithium and a metal compound for reducing lithium (or a metal compound for lithium reduction) to react with each other on a surface to form a product, which is included in the lithium metal complex oxide, in which the content of Ni3+ is higher than the content of Ni2+ and a ratio of Ni3+/Ni2+ is 1.5 or greater so that life characteristics and capacity characteristics are improved, while residual lithium is reduced, and a preparation method thereof.

Abstract: The present invention relates to a positive electrode active material for a lithium secondary battery and a lithium secondary battery including the same. The positive electrode active material according to the present invention reduces the specific surface area and grain boundary of a secondary particle in which a side reaction with an electrolyte solution occurs to improve the high-temperature stability of the positive electrode active material and reduce gas generation caused by the positive electrode active material.

Abstract: The present invention relates to a lithium metal complex oxide and a preparation method thereof, and more particularly, to a lithium metal complex oxide mixed with a metal compound for a lithium reaction, stirred and heat-treated to allow residual lithium and a metal compound for reducing lithium (or a metal compound for lithium reduction) to react with each other on a surface to form a product, which is included in the lithium metal complex oxide, in which the content of Ni3+ is higher than the content of Ni2+ and a ratio of Ni3+/Ni2+ is 1.5 or greater so that life characteristics and capacity characteristics are improved, while residual lithium is reduced, and a preparation method thereof.

Abstract: The present invention relates to a negative electrode active material for a rechargeable lithium battery, a method for preparing the same, and a rechargeable lithium battery using the same, and provides a negative electrode active material for a rechargeable lithium battery of a carbon-metal complex or a mixture type, containing a carbon-based active material including a first ceramic coating layer, a metal-based active material or a metal-base active material including a first ceramic coating layer, and a carbon-based active material.