Abstract: The present invention relates to a cobalt-free positive electrode active material having improved thermal stability and electrochemical properties, and a lithium secondary battery using the same.

Abstract: The present invention relates to a positive electrode active material which is formed such that a lithium ion diffusion path in a lithium composite oxide constituting a positive electrode active material is directed to a specific crystal plane, and has improved electrochemical properties and stability by improving the growth of the crystal plane to which the lithium ion diffusion path is directed, and a lithium secondary battery using the same.

Abstract: The present invention relates to a cobalt-free positive electrode active material having improved thermal stability and electrochemical properties, and a lithium secondary battery using the same.

Abstract: The present invention relates to a positive electrode active material and a lithium secondary battery including the same, and more particularly, to a positive electrode active material capable of preventing and/or mitigating the degradation of electrochemical properties and lifetime of the positive electrode active material caused by lithium impurities and/or a washing process by removing lithium impurities through surface modification without a washing process for reducing the content of lithium impurities such as LiOH and Li2CO3 remaining on the surface of the positive electrode active material, and a lithium secondary battery using a positive electrode including the positive electrode active material.

Abstract: The present invention relates to a positive electrode active material and a lithium secondary battery including the same, and more particularly, to a bimodal-type positive electrode active material including a first lithium composite oxide and a second lithium composite oxide with different particle diameters and compositions, and a lithium secondary battery including the same.

Abstract: The present invention relates to a positive electrode active material and a lithium secondary battery using the same, and more particularly, to a positive electrode active material that includes a lithium composite oxide comprising at least nickel and cobalt, and is capable of improving particle stability not only on the surface portion but also at the central portion of the lithium composite oxide due to the formation of a concentration gradient in which a cobalt concentration decreases from the surface portion to the central portion of the lithium composite oxide relative to the average radius of the lithium composite oxide to a predetermined thickness, a positive electrode comprising the positive electrode active material, and the lithium secondary battery using the positive electrode.

Abstract: The present invention relates to a cobalt-free positive electrode active material having improved thermal stability and electrochemical properties, and a lithium secondary battery using the same.

Abstract: The present invention relates to a positive electrode active material with improved electrochemical properties and stability and a lithium secondary battery using a positive electrode comprising the same, wherein secondary particles formed by aggregation of a plurality of primary particles are provided as aggregates of primary particles in which a concentration gradient of the doping metal is formed from a grain boundary between the primary particles toward a center portion of the primary particle.

Abstract: The present invention relates to a positive electrode active material which is formed such that a lithium ion diffusion path in a lithium composite oxide constituting a positive electrode active material is directed to a specific crystal plane, and has improved electrochemical properties and stability by improving the growth of the crystal plane to which the lithium ion diffusion path is directed, and a lithium secondary battery using the same.