Abstract:
PROBLEM TO BE SOLVED: To provide a reverse osmosis separation membrane providing not only high level salt removal rate but also remarkably improved water permeation rate and pollution resistance and to provide a production method of the same.SOLUTION: A reverse osmosis separation membrane comprises: a porous support body and an LbL (Layer-by-Layer) selection layer on the top of the porous support body; an intermediate layer consisting of a polymer nano thin film between the porous support body and the LbL selection layer; and a layered structure of the LbL selection layer where a first selection layer including a first organic monomer and a second selection layer including a second organic monomer are laminated.
Abstract:
PROBLEM TO BE SOLVED: To provide cardo copolybenzimidazoles, gas separation membranes, and a preparation method thereof.SOLUTION: This invention relates to cardo copolybenzimidazoles, a gas separation membrane using the same and a method for preparing the same. More particularly, cardo copolybenzimidazoles obtained by introducing cardo groups and aromatic ether groups to a polybenzimidazole backbone are synthesized. A gas separation membrane has significantly improved oxygen permeability by using the same, and the method for preparing the same is also provided. The cardo copolybenzimidazoles prepared by the invention have improved solubility as compared to the polybenzimidazole polymers according to the related art, show excellent mechanical properties while maintaining thermal stability so as to be formed into a film shape, and can provide a gas separation membrane having significantly improved gas permeability, particularly, oxygen permeability.
Abstract:
PROBLEM TO BE SOLVED: To provide a negative electrode active material of high crystallinity, high uniformity and high purity self-supporting metal sulfide-based two-dimensional nanostructure applicable to a secondary battery, and to provide a production method therefor.SOLUTION: The negative electrode active material grows directly, as a metal sulfide-based two-dimensional nanostructure, on a metal substrate by peeling an aggregate composed of a metal sulfide-based material. The production method thereof includes a step for producing an aggregate composed of a metal sulfide-based material, a step for inserting the aggregate into a tube in an electric furnace for pulse laser vapor deposition, a step for inserting a metal substrate into a tube and locating the metal substrate separately from the aggregate, a step for lowering the pressure in the tube to vacuum state and raising the temperature of the electric furnace to 590-610°C, and a step for peeling the aggregate by injecting pulse laser into the tube. The metal sulfide-based material is grown, as a two-dimensional nanostructure, directly on the metal substrate.
Abstract:
PROBLEM TO BE SOLVED: To provide a solid oxide fuel cell containing a nanostructure composite air electrode, and to provide a manufacturing method therefor.SOLUTION: The solid oxide fuel cell includes a) a fuel electrode support, b) a solid electrolyte layer formed on the fuel electrode support, and c) a nanostructure composite air electrode layer formed on the solid electrolyte layer. In the composite air electrode layer, an electrode material and an electrolyte material are mixed in molecule units, but they do not react nor be dissolved to form a single material. A manufacturing method therefor is also provided. A high performance fuel cell capable of low temperature operation and exhibiting excellent stability can be provided.
Abstract:
PROBLEM TO BE SOLVED: To provide a color conversion luminescent sheet and a method of fabricating the same.SOLUTION: The invention provides a color conversion luminescent sheet and a method of fabricating the same, the color conversion luminescent sheet including: an optical sheet having a plurality of protrusions and depressions on a surface thereof; a conductive layer disposed on another surface of the optical sheet; a color conversion luminescent layer deposited on the upper surface of the conductive layer and comprising a mixture of nanofibers and nanobeads having a binder resin and a color conversion luminescent material; and a protective layer on the upper surface of the color conversion luminescent layer, the protective layer having a stacked structure including an organic polymer protective layer and an inorganic thin protective layer.
Abstract:
PROBLEM TO BE SOLVED: To provide a method for reprocessing a metal oxide positive electrode active material for a lithium secondary battery and a method for synthesizing a metal oxide positive electrode active material for a lithium secondary battery by the method for reprocessing.SOLUTION: A method for reprocessing a metal oxide positive electrode active material for a lithium secondary battery according to the present invention includes the steps of: (a) dissolving a positive electrode active material from a waste lithium secondary battery using a sulfuric acid solution containing sulfurous acid gas to form a metal ion-containing solution; (b) injecting a sodium hydroxide solution and an aqueous ammonium solution in the metal ion-containing solution to form an electrode active material precursor; and (c) further filtrating, drying and grinding the electrode active material precursor, thus to obtain a solid-state positive electrode active material precursor. A method for synthesizing a metal oxide positive electrode active material for a lithium secondary battery according to the present invention comprises a step of mixing the electrode active material precursor formed by the method for reprocessing with lithium carbonate or lithium hydroxide, followed by heat treatment, to form a metal oxide positive electrode active material.
Abstract:
PROBLEM TO BE SOLVED: To provide a virtual experimental apparatus for nano element design, and to provide a method therefor.SOLUTION: A virtual experimental apparatus 10 for nano element design includes: a virtual test piece determination unit 100 which determines a virtual experiment material for designing a nano element; a virtual process experiment unit 200 which applies one or more processes to the virtual experiment material determined in the virtual test piece determination unit; and a virtual process analysis unit 300 which analyzes results of each process applied to the virtual experiment material in the virtual process experiment unit. The virtual process analysis unit further includes a multilevel analysis unit which analyzes the results of the processes with one or more particle levels as a reference.
Abstract:
PROBLEM TO BE SOLVED: To provide an object material recognition device and its method.SOLUTION: The object material recognition device includes: a video camera part (100) for imaging a spatial image including various objects that are present in space; an exploring radar part (110) for irradiating the object with incident waves, and receiving space radar information including respective surface reflected waves of surfaces of the objects and respective internal reflected waves returning from the inside of the objects; an information preservation part (140) for preserving reference physical property information respectively corresponding to materials of the objects; and a material recognition processing part (150) for recognizing the material information of each object by utilizing the reference physical property information in the information preservation part (140), the spatial image provided in the video camera part (100) and the space radar information provided in the exploring radar part (110).