Abstract: Provided are a positive electrode for a rechargeable lithium battery and a rechargeable lithium battery including the same, the positive electrode including a current collector and a positive electrode active material layer on the current collector, wherein the positive electrode active material layer includes a positive electrode active material and an aromatic monovalent carboxylic acid.

Abstract: A composite cathode active material includes: a secondary including a core including a plurality of primary particles; and a shell on the core, wherein the plurality of primary particles include a nickel-containing lithium transition metal oxide doped with a first metal, and wherein at least one grain boundary between the plurality of primary particles includes a first composition including the first metal.

Abstract: Provided are a positive electrode for a rechargeable lithium battery and a rechargeable lithium battery including the same, the positive electrode including a positive electrode active material, a conductive material, and a binder, wherein the positive electrode includes a polyimide-based polymer having a carboxyl group. The positive electrode has excellent lithium ion conductivity as well as prevents a side reaction of a positive electrode active material with an electrolyte by including a polyimide-based polymer having a carboxyl group in a positive electrode, wherein the polyimide-based polymer having high heat resistance and high stability is not phase-decomposed in the positive electrode to form a complex compound but protects the surface of the positive electrode active material.

Abstract: Provided are a positive electrode for a rechargeable lithium battery and a rechargeable lithium battery including the same. The positive electrode for a rechargeable lithium battery includes a current collector, a first positive electrode active material layer on the current collector and including a first positive electrode active material, and a second positive electrode active material layer on the first positive electrode active material layer and including a second positive electrode active material, wherein the first positive electrode active material layer includes ceramic particles, a particle diameter of each of the ceramic particles is in a range from about 10 nm to about 500 nm, and the ceramic particles are included only in the first positive electrode active material layer.

Abstract: A positive active material, including: a lithium transition metal composite oxide represented by Formula 1: LiaNibM1cM2dM3eO2??Formula 1 wherein, in Formula 1, M1 comprises Co, Mn, or a combination thereof, M2 comprises Mg and Ti, M3 comprises Al, B, Ca, Na, K, Cr, V, Fe, Cu, Zr, Zn, Sr, Sb, Y, Nb, Ga, Si, Sn, Mo, W, Ba, a rare earth element, or a combination thereof, 0.9?a?1.1, 0.7?b<1.0, 0<c?0.3, 0<d?0.03, 0?e?0.05, and 0.95?(b+c+d+e)?1.05, and a molar ratio of Ti:Mg in M2 is about 1:1 to about 3:1.

Abstract: A includes a cathode active material including a lithium transition metal oxide, wherein the lithium transition metal oxide includes nickel and a non-nickel transition metal, and an amount of the nickel in the lithium transition metal oxide is about 50 mole percent or greater with respect to a total number of moles of transition metals in the lithium transition metal oxide, a conducting agent including a linear carbonaceous conducting agent, and a binder, wherein the binder includes a first fluorinated binder not including a polar functional group, a second fluorinated binder including a polar functional group, a first non-fluorinated binder including a cyano group, and a second non-fluorinated binder including a cyanoalkyl group.

Abstract: A cathode active material includes a secondary particle including an aggregate of a plurality of primary particles, wherein the secondary particle includes a nickel-containing lithium transition metal oxide having a layered crystal structure, wherein the plurality of primary particles includes a first primary particle having a size greater than about 400 nanometers, a second primary particle having a size less than about 150 nanometers, and a third primary particle having a size of about 150 nanometers to about 400 nanometers, wherein the third primary particle has a area of greater than or equal to about 80% of a total area of the plurality of primary particles, and wherein the secondary particle has a porosity of less than or equal to about 10% of a total area of the cathode active material.

Abstract: A composite cathode active material includes: a secondary including a core including a plurality of primary particles; and a shell on the core, wherein the plurality of primary particles include a nickel-containing lithium transition metal oxide doped with a first metal, and wherein at least one grain boundary between the plurality of primary particles includes a first composition including the first metal.

Abstract: A includes a cathode active material including a lithium transition metal oxide, wherein the lithium transition metal oxide includes nickel and a non-nickel transition metal, and an amount of the nickel in the lithium transition metal oxide is about 50 mole percent or greater with respect to a total number of moles of transition metals in the lithium transition metal oxide, a conducting agent including a linear carbonaceous conducting agent, and a binder, wherein the binder includes a first fluorinated binder not including a polar functional group, a second fluorinated binder including a polar functional group, a first non-fluorinated binder including a cyano group, and a second non-fluorinated binder including a cyanoalkyl group.

Abstract: A cathode active material includes a secondary particle including an aggregate of a plurality of primary particles, wherein the secondary particle includes a nickel-containing lithium transition metal oxide having a layered crystal structure, wherein the plurality of primary particles includes a first primary particle having a size greater than about 400 nanometers, a second primary particle having a size less than about 150 nanometers, and a third primary particle having a size of about 150 nanometers to about 400 nanometers, wherein the third primary particle has a area of greater than or equal to about 80% of a total area of the plurality of primary particles, and wherein the secondary particle has a porosity of less than or equal to about 10% of a total area of the cathode active material.

Abstract: A positive active material, including: a lithium transition metal composite oxide represented by Formula 1: LiaNibM1cM2dM3eO2?? Formula 1 wherein, in Formula 1, M1 comprises Co, Mn, or a combination thereof, M2 comprises Mg and Ti, M3 comprises Al, B, Ca, Na, K, Cr, V, Fe, Cu, Zr, Zn, Sr, Sb, Y, Nb, Ga, Si, Sn, Mo, W, Ba, a rare earth element, or a combination thereof, 0.9?a?1.1, 0.7?b<1.0, 0<c?0.3, 0<d?0.03, 0?e?0.05, and 0.95?(b+c+d+e)?1.05, and a molar ratio of Ti:Mg in M2 is about 1:1 to about 3:1.