Lg Chem, Ltd

Yi Rang Lim

Seong Bae Kim

Kyoung Wan Park

Eun Hee Kim

Hyun Uk Kim

Hong Kyu Park

Young Su Park

Chang Jun Moon

Jun Wuk Park

Kyoung Won Kim

Sung In Kim

Sang Soo Jang

Woo Hyun Kim

Song Yi Yang

Byung Hyun Hwang

An apparatus for cleaning a metal filter comprises a cleaning bath having a predetermined size and connected to a cleaning solution tank, a jig which is vertically elevatable and horizontally slidable in the cleaning bath and to which the metal filter is fixed, a nozzle mounted so that a discharge hole thereof is faced upward in the cleaning bath, and a controller which controls supply and blocking of a cleaning solution from the cleaning solution tank to the cleaning bath, controls supply and blocking of compressed air or the water to the nozzle, controls movement of the jig, and controls filling or discharging of the water into/from the cleaning bath. The controller controls the movement of the jig and selectively controls the supply and blocking of the water, the cleaning solution, and the compressed air, and the draining of the cleaning bath according to predetermined logic.

Apparatus and method for cleaning metal filter

A method of preparing a positive electrode active material precursor includes forming positive electrode active material precursor particles while adding a reaction solution including a transition metal-containing solution, an ammonium ion-containing solution, and a basic aqueous solution to a reactor with a filtration device installed therein. The method further includes performing continuous concentration in which the reaction solution is added while continuously discharging a portion of the reaction solution in the reactor out of the reactor using the filtration device when the reactor is full, wherein a concentration of a solid content in the reactor is increased at a constant rate.

Positive electrode active material precursor for lithium secondary battery, and method of preparing the same

A cleaning method according to the present invention comprises mounting the metal filter on a jig that is vertically elevatable and horizontally slidable in a cleaning bath so that the opening is faced downward, descending the jig so that a first nozzle installed in the cleaning bath enters the opening, injecting a predetermined amount of water and a cleaning solution into the cleaning bath so that the metal filter is immersed, spraying compressed air through the first nozzle to discharge bubbles of the compressed air toward an inner surface of the metal filter, draining the cleaning bath, spraying water through a second nozzle to remove the cleaning solution from the metal filter, and spraying the compressed air through the first nozzle to dry the metal filter. An apparatus for cleaning a metal filter is also disclosed.

Provided are a polarizer protective film comprising a polymeric film and a coating layer formed on at least one surface of the polymeric film, where the coating layer has a plurality of concave embossed patterns and has a surface roughness of 2.0 nm to 20.0 nm, and a manufacturing method thereof.

Polarizer protective film and manufacturing method thereof

A positive electrode active material for a secondary battery includes a lithium composite transition metal oxide including nickel (Ni), cobalt (Co), and manganese (Mn), wherein the lithium composite transition metal oxide has a layered crystal structure of space group R3m, includes the nickel (Ni) in an amount of 60 mol % or less based on a total amount of transition metals, includes the cobalt (Co) in an amount greater than an amount of the manganese (Mn), and is composed of single particles.

Positive electrode active material including single particles of lithium nickel composite transition metal oxide, method of preparing the same, and lithium secondary battery including the same

A positive electrode active material precursor having a uniform particle size distribution and represented by Formula, wherein a percentage of fine powder with an average particle diameter (D) ofμm or less is generated when the positive electrode active material precursor is rolled atkgf/cmis less than%, and an aspect ratio isor more, and a method of preparing the positive electrode active material precursor[NiCoMM  [Formula]

A co-precipitation reactor with a continuous filtering system mounted, wherein the co-precipitation reactor includes a main body accommodating a reactant for reaction therein, an input unit inputting the reactant into the main body, and a filter unit installed in the main body to filter a precursor of the precursor generated by reacting with the reactant in the main body and a reaction solution.

Co-precipitation reactor

The present invention relates to a method for preparing a polarizer protecting film. More specifically, the present invention relates to a method for preparing a polarizer protecting film capable of exhibiting excellent physical and optical properties and of preventing damages of a lower polarizer plate caused by a prism sheet.

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Daejeon, South Korea

Yi Rang Lim