Lg Chem, Ltd

Lg Energy Solution, Ltd.

Hye Bin Kim

Joon Ho Shin

Mi Kyung Kim

Eun Kyo Kim

Song Taek Oh

Jong Keon Yoon

Jung Seok Choi

Yong Jun Kim

Hyeok Moo Lee

Byeong Gil Lyu

A method and electrode assembly for evaluating performance of an electrode uses a negative electrode on which a negative electrode active material is applied to both surfaces of a negative electrode collector; a positive electrode on which a positive electrode active material is applied to both surfaces of a positive electrode collector and which is stacked with the negative electrode; two separators stacked between the negative electrode and the positive electrode; a reference electrode stacked between the two separators; and a second negative electrode stacked between the separator, which is relatively close to the negative electrode, of the two separators and the negative electrode.

Electrode assembly for evaluating performance of electrode and method for evaluating performing electrode

Provided are a method for preparing an oligomer and an apparatus for preparing an oligomer. The method for preparing an oligomer includes performing an oligomerization reaction by feeding a feed stream containing a monomer to a reactor; feeding a first discharge stream of the reactor to a first separation device, and feeding a second discharge stream of the reactor to a second separation device; feeding a lower discharge stream of the second separation device to a third separation device; feeding an upper discharge stream containing the monomer of the third separation device to a monomer dissolution device and dissolving the upper discharge stream in a solvent fed to the monomer dissolution device; and feeding a discharge stream of the monomer dissolution device to the reactor.

Oligomer preparation method and oligomer preparation apparatus

Provided are a method for preparing an oligomer and an apparatus for preparing the same. The method for preparing an oligomer including: supplying a feed stream including a monomer to a reactor to perform an oligomerization reaction; supplying a first discharge stream from the reactor to a first separation device and supplying a second discharge stream from the reactor to a second separation device; recovering the monomer as an upper discharge stream from the second separation device and supplying a lower discharge stream from the second separation device to a third separation device; and supplying an upper discharge stream from the third separation device to the second separation device.

Oligomer preparation method and oligomer preparation device

A method and an apparatus for preparing an oligomer, the method including supplying a feed stream including a monomer to a reactor to perform an oligomerization reaction, recovering unreacted monomer, and dissolving the recovered unreacted monomer in a solvent in a monomer dissolution device and supplying a discharge stream from the monomer dissolution device to the reactor. The method and the apparatus provide reduced investment costs and improved economic feasibility as there is no need to use a refrigerant at a very low temperature or install a separate compressor to recover and reuse the unreacted monomer in an oligomer production process.

Method and apparatus for preparing oligomer

A method and an apparatus for preparing an alpha-olefin. The method includes supplying a feed stream including a gaseous ethylene monomer to a monomer dissolution device to dissolve the feed stream in a solvent and form a liquid ethylene monomer, and supplying a feed stream including the liquid ethylene monomer as a discharge stream to a reactor, thereby removing heat of dissolution of the gaseous ethylene monomer outside of the reactor, and decreasing an amount of a refrigerant used in an alpha-olefin production process to improve economic feasibility.

Method and apparatus for preparing alpha olefin

Provided is a method for manufacturing a positive electrode for a secondary battery, the method including applying a first positive electrode slurry including a first positive electrode active material on a positive electrode current collector, forming a first positive electrode mixture layer by primarily rolling the current collector applied with the first positive electrode slurry, applying a second positive electrode slurry including a second positive electrode active material on the above-formed first positive electrode mixture layer, and forming a second positive electrode mixture layer on which the first positive electrode mixture layer is laminated by secondarily rolling the first positive electrode mixture layer applied with the second positive electrode slurry.

Positive electrode for secondary battery, manufacturing method thereof, and lithium secondary battery including same

Provided is a positive electrode for a secondary battery, the positive electrode including a positive electrode current collector, a first positive electrode mixture layer laminated on the positive electrode current collector and including a first positive electrode active material and a first conductive material, and a second positive electrode mixture layer laminated on the first positive electrode mixture layer and including a second positive electrode active material and a second conductive material, wherein the average particle diameter (D) of the second positive electrode active material is 5 to 80% of the average particle diameter (D) of the first positive electrode active material, and the ratio of the specific surface area of the second conductive material to the specific surface area of the second positive electrode active material is 9 or less.

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Daejeon, South Korea

Hye Bin Kim