Lg Energy Solution, Ltd.

Korea Basic Science Institute

Lg Chem, Ltd

Hyo Sik Kim

Seung He Woo

Gui Long Jin

Ki Soo Chang

Geon Hee Kim

Ji Eun Lee

Song Taek Oh

Young Geun Choi

Joo Yul Baek

Sol Nip Lee

Jeong Gil Kim

Sun Cheol Yang

Sun Choel Yang

Sang Yong Lee

Jeong Ho Ha

Sang Hyeok Kim

A method for manufacturing a negative electrode for a lithium secondary battery is provided in which the method is capable of effectively performing pre-lithiation. While a negative electrode is compressed with a press, a lithium alloy layer is formed on a portion in contact with a negative electrode active material layer of upper and lower plates of the press, and a negative electrode tab is electrically connected to the press through a connection part respectively disposed on the upper and lower plates of the press, and thus, it is possible to manufacture a negative electrode for a lithium secondary battery in which the pre-lithiation of the negative electrode may be performed at time of compression even without a separate pre-lithiation process.

Method for manufacturing negative electrode for lithium secondary battery

A method of preparing a lithium secondary battery is provided which may effectively perform pre-lithiation, wherein, a closed square band-shaped lithium foil having an opening formed at a center thereof is prepared during the preparation of the lithium secondary battery, and a negative electrode is disposed in the opening of the lithium foil, but pre-lithiation of the negative electrode may be performed without a separate pre-lithiation process by disposing the negative electrode and the lithium foil so as not to overlap with each other and disposing a negative electrode tab so as to be in contact with the lithium foil.

Method of preparing lithium secondary battery

The present disclosure provides an electrode for a secondary battery including a current collector having an electrode tab protruding outward to at least one outer peripheral side thereof, an electrode mixture layer formed on the current collector, and an electrode protecting layer applied on the electrode mixture layer, wherein the electrode protecting layer includes a conductive material and a binder to supplement conductivity of the electrode mixture layer and prevent separation of the electrode mixture layer from the current collector.

Electrode for secondary battery including electrode protecting layer

Provided are a positive electrode for a secondary battery which includes a positive electrode collector, a porous positive electrode active material layer disposed on a surface of the positive electrode collector and including a positive electrode active material and first carbon nanotubes, and a conductive layer disposed on a surface of the positive electrode active material layer, wherein the conductive layer includes a porous network structure formed by a plurality of second carbon nanotubes and has a porosity equal to or greater than a porosity of the positive electrode active material layer +10 vol %, and a secondary battery including the same.

Positive electrode for secondary battery and secondary battery including the same

The present invention relates to an image sensor comprising a microlens array, and to a manufacturing method thereof. The method of the present invention includes gradually increasing the aluminum composition ratio of a compound semiconductor as the latter gradually gets farther from a substrate, to enable a microlens-forming layer to grow, and making the oxidation rate of the region adjacent to the substrate slower and the oxidation rate of the region farther from the substrate faster, making the interface between the oxidized region and the unoxidized region into a lens shape after the completion of oxidation. The thus-made lens is integrated into an image sensor. The present invention reduces costs for manufacturing image sensors in which a microlens is integrated, increases the signal-to-noise ratio and resolution of the image sensor, and achieves improved sensitivity.

Image sensor comprising a digital-alloy microlens array integrated with sensor array, and manufacturing method thereof

Provided is an optical system for a thermal image microscope. The optical system includes an image forming unit and a relay unit. The image forming unit forms a focus. The relay unit elongates an optical path. Here, the image forming unit includes six lenses. The relay unit includes two lenses. Aspherical surfaces of the lenses are all convex surfaces.

Optical system for thermal image microscope

Growing community of inventors

Daejeon, South Korea

Hyo Sik Kim