Abstract: In the case of a gas in which several gases are mixed, a type and concentration of the gas may be incorrectly measured when measured using only an optical band-pass filter. The invention of the present application is directed to providing a technology in which a plurality of broadband band-pass filters having overlapping regions are provided to calculate a magnitude of absorption for each wavelength band for light passing through each broadband band-pass filter, thereby identifying the presence of a gas of interest and the presence of a gas other than the gas of interest.

Abstract: Proposed is a solar power equalization system, more particularly, a solar power equalization system, wherein connection of an output-reduced string is switched to a power compensation device for fast charging, and after fast charging, compensation for output is performed, thereby minimizing the influence of the reduction in output of a string on the total output and increasing power generation efficiency.

Abstract: Provided are a separator coating composition for a secondary battery including inorganic particles and a silane salt compound having a specific structure, a separator using the same, and an electrochemical device including the same. Specifically, a separator coating composition for a secondary battery which implements adhesion between an inorganic material layer and a porous substrate without including an acid/polymer-based organic binder in a coating composition for forming the inorganic material layer on one or both surfaces of the porous substrate and does not need a separate dispersing agent for dispersing the inorganic particles, a separator manufactured using the same, and an electrochemical device including the separator are provided.

Abstract: The present invention relates to electrode slurry coating apparatus and method, the present invention ultimately allowing the process efficiency to be increased and rate of errors to be reduced when double-layer structured active material layers are formed by temporally adjusting the height of first and second discharge outlets through which active material is discharged.

Abstract: The present invention relates to electrode slurry coating apparatus and method, the present invention ultimately allowing the process efficiency to be increased and rate of errors to be reduced when double-layer structured active material layers are formed by temporally adjusting the height of first and second discharge outlets through which active material is discharged.

Abstract: Disclosed are a negative electrode, including: a negative electrode current collector; and a negative electrode active material layer disposed on at least one surface of the negative electrode current collector, and satisfying the following formula: B / A ? 1.2 , wherein, in a graph measuring the binding force according to a normalized thickness of the active material layer, A is defined as a maximum value of the binding force of the active material layer in a normalized thickness of 20-60 and B is defined as a maximum value of the binding force of the active material layer in a normalized thickness of 70-90, and a lithium secondary battery including the negative electrode.

Abstract: An optical multilayer structure including a hard coating layer, a low-reflective adhesion reinforcement layer, and a water repellent layer on a substrate layer. The optical multilayer structure includes a structure in which a hard coating layer, a low-reflective adhesion reinforcement layer including a siloxane-based compound, and a water repellent layer including an alkoxysilane-based compound containing a fluorine atom are laminated on a substrate layer, thereby having high wear resistance and water contact angle simultaneously.

Abstract: Disclosed is a slot die coater adjusting device, which adjusts a slot die coater including a lower die having a lower discharge hole for discharging a first active material slurry and an upper die having an upper discharge hole for discharging a second active material slurry, to adjust a distance between the lower discharge hole and the upper discharge hole by allowing the upper die to move. The slot die coater adjusting device includes pressing block assemblies respectively provided to both longitudinal sides of the slot die coater and fixed to the upper die; a linear motion (LM) guide disposed at a lower portion of the pressing block assembly and connected to the pressing block assembly to guide a movement of the pressing block assembly; a servo motor configured to give a power for moving the LM guide; and a reducer connected between the servo motor and the LM guide.

Abstract: Disclosed is a slot die coater adjusting device, which adjusts a slot die coater including a lower die having a lower discharge hole for discharging a first active material slurry and an upper die having an upper discharge hole for discharging a second active material slurry, to adjust a distance between the lower discharge hole and the upper discharge hole by allowing the upper die to move. The slot die coater adjusting device includes pressing block assemblies respectively provided to both longitudinal sides of the slot die coater and fixed to the upper die; a linear motion (LM) guide disposed at a lower portion of the pressing block assembly and connected to the pressing block assembly to guide a movement of the pressing block assembly; a servo motor configured to give a power for moving the LM guide; and a reducer connected between the servo motor and the LM guide.

Abstract: The present invention relates to a double slit coating die, and an electrode active material coating apparatus comprising same, the double slit coating die comprising first to fourth blocks which are positioned sequentially adjacent to each other, and having a structure in which the positions of the first and second blocks can move in a direction tilted at an angle ? with respect to the interface between the second and third blocks. The present invention has the effects of preventing slip surfaces between blocks constituting the die from spreading apart, and reducing offset in a coating process.

Abstract: The present invention relates to a diazaspiro compound and a use thereof. The diazaspiro compound may be significantly advantageously used as a monomer for producing a polyimide film having excellent optical properties.

Abstract: The present invention relates to an apparatus and method for monitoring a dry state of an electrode substrate in which electrode slurry is applied to a collector. The monitoring method comprises emitting light onto a surface of the electrode substrate; receiving the light reflected by the surface of the electrode substrate; and analyzing a luminous intensity or spectrum of the received light to estimate a drying rate of the electrode substrate. The apparatus includes a light emitting part emitting light from a light source onto a surface of the electrode substrate; a light receiving part receiving the light reflected by the surface of the electrode substrate; and a computing device analyzing a luminous intensity or spectrum of the received light and comparing analyzed characteristics of the light with the reference data of the reflected light to the drying rate of the electrode substrate.

Abstract: A method for manufacturing an electrode having an irregular shape through a simple process while minimizing the amount of wasted electrode active material is provided. The method results in first to third coating areas formed to be spaced apart from each other on a collector, a plurality of fourth coating areas formed between the first coating area and the second coating area, and a plurality of fifth coating areas formed between the second coating area and the third coating area. The plurality of fourth coating areas and the plurality of fifth coating areas are dislocated from each other when viewed from one side in a width direction of the collector.

Abstract: An etchant composition includes a silane compound represented by the following Chemical Formula 1: wherein R1 to R6 are independently hydrogen, halogen, a substituted or unsubstituted C1-C20 hydrocarbyl group, a phenyl group, a C1-C20 alkoxy group, a carboxy group, a carbonyl group, a nitro group, a tri (C1-C20) alkylsilyl group, a phosphoryl group, or a cyano group, L is a direct bond or C1-C3 hydrocarbylene, A is an n-valent radical, and n is an integer of 1 to 4.

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 disclosure relates to a silicon compound represented by Formula 1 below: wherein R1 to R6 are each independently selected from a hydrogen, a hydrocarbyl group and a non-hydrocarbyl group, L is a direct bond or hydrocarbylene, X is oxygen (O) or sulfur (S), Y and Z are each independently selected from NR7, O, and S, where R7 is a hydrogen, a hydrocarbyl group, or a non-hydrocarbyl group, and Y and Z are not simultaneously NR7, and A is an n-valent radical, where n is an integer of 1 to 6.

Abstract: Disclosed is a slot die coater adjusting device, which adjusts a slot die coater including a lower die having a lower discharge hole for discharging a first active material slurry and an upper die having an upper discharge hole for discharging a second active material slurry, to adjust a distance between the lower discharge hole and the upper discharge hole by allowing the upper die to move. The slot die coater adjusting device includes pressing block assemblies respectively provided to both longitudinal sides of the slot die coater and fixed to the upper die; a linear motion (LM) guide disposed at a lower portion of the pressing block assembly and connected to the pressing block assembly to guide a movement of the pressing block assembly; a servo motor configured to give a power for moving the LM guide; and a reducer connected between the servo motor and the LM guide.

Abstract: The present invention relates to electrode slurry coating apparatus and method, the present invention ultimately allowing the process efficiency to be increased and rate of errors to be reduced when double-layer structured active material layers are formed by temporally adjusting the height of first and second discharge outlets through which active material is discharged.

Abstract: The present invention relates to an electrode slurry coating device and method, wherein the heights of first and second slot die heads for discharging active material can be controlled according to time to improve process efficiency and reduce defect rates when forming an active material layer having a double layer structure.

Abstract: An etching composition includes phosphoric acid, a silane compound comprising at least one silicon (Si) atom, and an ammonium salt represented by Formula 1 below: wherein: L1 to L3 are independently substituted or unsubstituted hydrocarbylene, R1 to R4 are independently hydrogen, a substituted or unsubstituted hydrocarbyl group, and Xn? is an n-valent anion, where n is an integer of 1 to 3.