Lg Chem, Ltd

Lg Energy Solution, Ltd.

Hyun Sik Chae

Sang Hoon Choy

Hyung Suk Cho

Hyeon Sik Choi

Dong Hyun Kim

Houng Sik Yoo

Byoung Hoon Ahn

Dong Hyun Cho

Jin Young Son

Gye Min Kwon

Jin Myung Cha

Cheol Woo Kim

Joo Yul Baek

Jun Muk Lim

Ki Yeon Jo

A conductive material dispersion liquid, and an electrode and a lithium secondary battery manufactured using the same. The conductive material dispersion liquid includes a carbon-based conductive material, a dispersant, and a dispersion medium. 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.

Conductive material dispersion liquid, electrode and lithium secondary battery prepared by using the same

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.

Carbon nanotube dispersion and method for preparing the same

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&#x3c;x1&#x3c;0.69, 0.15&#x3c;y1&#x3c;0.29, 0.15&#x3c;z1&#x3c;0.29, x1+y1+z1=1) and Li(Nix2Mny2Coz2)O2 (0.75&#x3c;x2&#x3c;0.89, 0.05&#x3c;y2&#x3c;0.19, 0.05&#x3c;z2&#x3c;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&#xd7;&#x3c;0.0050&#xd7;&#x2003;&#x2003;[Relation 1]0.0015&#xd7;&#x3c;0.0044&#xd7;&#x2003;&#x2003;[Relation 2]

Positive electrode and secondary battery including same

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.

Method of preparing graphene

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.

Grinder using induced electric field

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.

Growing community of inventors

Daejeon, South Korea

Hyun Sik Chae