Abstract: The present invention relates to a carbon nanotube dispersion including carbon nanotubes, a polymer dispersant containing an amine, a phenolic compound including two or more aromatic rings, and an aqueous solvent, wherein the polymer dispersant and the phenolic compound including two or more aromatic rings are included in a weight ratio of 100:1 to 100:90, and having low viscosity and a small change of viscosity over time.

Abstract: The present invention relates to a carbon nanotube dispersion including carbon nanotubes, a polymer dispersant containing an amine, a phenolic compound including two or more aromatic rings, and an aqueous solvent, wherein the polymer dispersant and the phenolic compound including two or more aromatic rings are included in a weight ratio of 100:1 to 100:90, and having low viscosity and a small change of viscosity over time.

Abstract: A positive electrode includes a positive electrode active material layer including a positive electrode active material, a conductive material, and a binder, wherein the positive electrode active material contains any one among Li(Nix1Mny1Coz1)O2 (0.55<x1<0.69, 0.15<y1<0.29, 0.15<z1<0.29, x1+y1+z1=1) and Li(Nix2Mny2Coz2)O2 (0.75<x2<0.89, 0.05<y2<0.19, 0.05<z2<0.19, x2+y2+z2=1) and the conductive material contains a carbon nanotube, and when the positive electrode active material is Li(Nix2Mny2Coz2)O2, the positive electrode active material layer satisfies Relation 1 and when the positive electrode active material is Li(Nix2Mny2Coz2)O2, the positive electrode active material layer satisfies Relation 2: 0.0020×a<b<0.0050×a??[Relation 1] 0.0015×a<b<0.

Abstract: The present invention relates to a carbon nanotube dispersion including carbon nanotubes, a polymer dispersant containing an amine, a phenolic compound including two or more aromatic rings, and an aqueous solvent, wherein the polymer dispersant and the phenolic compound including two or more aromatic rings are included in a weight ratio of 100:1 to 100:90, and having low viscosity and a small change of viscosity over time.

Abstract: A method of preparing graphene, including preparing graphite; and putting the graphite in the inside of a vessel and applying vibration at a frequency of 55 Hz to 65 Hz to the vessel.

Abstract: The present invention relates to a carbon nanotube dispersion including carbon nanotubes, a polymer dispersant containing an amine, a phenolic compound including two or more aromatic rings, and an aqueous solvent, wherein the polymer dispersant and the phenolic compound including two or more aromatic rings are included in a weight ratio of 100:1 to 100:90, and having low viscosity and a small change of viscosity over time.

Abstract: Provided are a conductive material dispersion liquid, and an electrode and a lithium secondary battery manufactured using the same. The conductive material dispersion liquid according to the present invention includes a carbon-based conductive material, a dispersant, and a dispersion medium, wherein the dispersant is a copolymer including a first repeating unit represented by Chemical Formula 1, a second repeating unit represented by Chemical Formula 2, and a third repeating unit represented by Chemical Formula 3, and the dispersion medium is a non-aqueous solvent.

Abstract: Disclosed is a method for manufacturing an electrode for a lithium secondary battery, including the steps of: (S1) dry mixing a conductive material and an electrode active material; (S2) dry mixing the resultant product of step (S1) with a binder to obtain electrode mixture powder; and (S3) applying the electrode mixture powder to at least one surface of a current collector. According to an embodiment of the present disclosure, electrode mixture powder is prepared without using a solvent and is applied to a current collector to provide an electrode. Thus, there is no need for a separate drying step. Therefore, the binder and conductive material coated on the surface of electrode active material cause no surface migration phenomenon. As a result, it is possible to prevent degradation of the adhesion of the electrode, and thus to prevent degradation of the performance of the lithium secondary battery.

Abstract: A positive electrode includes a positive electrode active material layer including a positive electrode active material, a conductive material, and a binder, wherein the positive electrode active material contains any one among Li(Nix1MnylCoz1)O2 (0.55<x1<0.69, 0.15<y1<0.29, 0.15<z1<0.29, x1+y1+z1=1) and Li(Nix2Mny2Coz2)O2 (0.75<x2<0.89, 0.05<y2<0.19, 0.05<z2<0.19, x2+y2+z2=1) and the conductive material contains a carbon nanotube, and when the positive electrode active material is Li(Nix2Mny2Coz2)O2, the positive electrode active material layer satisfies Relation 1 and when the positive electrode active material is Li(Nix2Mny2Coz2)O2, the positive electrode active material layer satisfies Relation 2: 0.0020×a<b<0.0050×a??[Relation 1] 0.0015×a<b<0.

Abstract: A condensed cyclic compound represented by Formula 1: Ar1-(L1)a1-B-(L2)a2-Ar2??Formula 1 wherein, in Formula 1, groups and variables are the same as described in the specification.

Abstract: The present invention relates to a grinder using induced electric fields. The grinder comprises: a grinding unit on which a plurality of protrusions for cutting are disposed on an outer circumferential surface thereof; a power unit disposed in the grinding unit to generate electric fields and attach the conductive materials to the grinding unit; and a chamber disposed outside the grinding unit and comprising beads that disperse and grind the conductive materials attached to the grinding unit, wherein the conductive materials have directionality by the electric fields of the power unit.

Abstract: A method of preparing graphene, including preparing graphite; and putting the graphite in the inside of a vessel and applying vibration at a frequency of 55 Hz to 65 Hz to the vessel.

Abstract: Disclosed is a method for preparing positive electrode active material slurry, which includes the steps of: (S1) preparing a positive electrode active material, a linear conductive material, a polymer binder and a solvent; (S2) introducing 40-80% of the prepared polymer binder, the positive electrode active material and the linear conductive material to the solvent, followed by mixing, to obtain a first positive electrode active material slurry; and (S3) further introducing the remaining polymer binder to the first positive electrode active material slurry, followed by mixing, to obtain a second positive electrode active material slurry.

Abstract: An organic light-emitting device including a first electrode; a second electrode; and an organic layer disposed between the first electrode and the second electrode, wherein the organic layer comprises an emission layer, and wherein the organic layer comprises a first compound represented by Formula 1 and a second compound having the lowest excited triplet energy level greater than 2.73 electron volts: wherein in Formula 1, R11 to R33 are the same as described in the specification.

Abstract: An organic light-emitting device including a first electrode; a second electrode; and an organic layer disposed between the first electrode and the second electrode, wherein the organic layer comprises an emission layer, and wherein the organic layer comprises a first compound represented by Formula 1 and a second compound having the lowest excited triplet energy level greater than 2.73 electron volts: wherein in Formula 1, R11 to R33 are the same as described in the specification.

Abstract: The present invention provides a method of preparing an electrode slurry for lithium secondary batteries in which the physical properties of the electrode slurry are improved to minimize a drag line by performing the primary mixing process at high viscosity, a method of manufacturing an electrode of which a defect rate of the electrode is reduced and with which battery stability is improved by using the method of preparing an electrode slurry for secondary batteries, an electrode manufactured using the method, and a secondary battery including the electrode.

Abstract: Disclosed is a method for manufacturing an electrode for a lithium secondary battery, including the steps of: (S1) dry mixing a conductive material and an electrode active material; (S2) dry mixing the resultant product of step (S1) with a binder to obtain electrode mixture powder; and (S3) applying the electrode mixture powder to at least one surface of a current collector. According to an embodiment of the present disclosure, electrode mixture powder is prepared without using a solvent and is applied to a current collector to provide an electrode. Thus, there is no need for a separate drying step. Therefore, the binder and conductive material coated on the surface of electrode active material cause no surface migration phenomenon. As a result, it is possible to prevent degradation of the adhesion of the electrode, and thus to prevent degradation of the performance of the lithium secondary battery.

Abstract: Disclosed is a method for preparing positive electrode active material slurry, which includes the steps of: (S1) preparing a positive electrode active material, a linear conductive material, a polymer binder and a solvent; (S2) introducing 40-80% of the prepared polymer binder, the positive electrode active material and the linear conductive material to the solvent, followed by mixing, to obtain a first positive electrode active material slurry; and (S3) further introducing the remaining polymer binder to the first positive electrode active material slurry, followed by mixing, to obtain a second positive electrode active material slurry.

Abstract: The present invention relates to a grinder using induced electric fields. The grinder comprises: a grinding unit on which a plurality of protrusions for cutting are disposed on an outer circumferential surface thereof; a power unit disposed in the grinding unit to generate electric fields and attach the conductive materials to the grinding unit; and a chamber disposed outside the grinding unit and comprising beads that disperse and grind the conductive materials attached to the grinding unit, wherein the conductive materials have directionality by the electric fields of the power unit.

Abstract: The present invention provides a method of preparing an electrode slurry for lithium secondary batteries in which the physical properties of the electrode slurry are improved to minimize a drag line by performing the primary mixing process at high viscosity, a method of manufacturing an electrode of which a defect rate of the electrode is reduced and with which battery stability is improved by using the method of preparing an electrode slurry for secondary batteries, an electrode manufactured using the method, and a secondary battery including the electrode.