Korea Institute of Science and Technology

Amogreentech Co., Ltd.

Sung-Yeon Jang

Seong M Jo

Dong Young Kim

Dong-Young Kim

Seong-Mu Jo

Sang Yup Lee

Tae Hoon Lim

In Hwan Oh

Heung Yong Ha

Suk-Woo Nam

Seong Ahn Hong

Jae-Min Hong

Il-Doo Kim

Soo-Kil Kim

Nam-Gyu Park

Tae Jung Park

Han-Ik Joh

Hyun-Ju Kim

Jeong Joo Choo

Byung-Hong Lee

Byoung-Hong Yi

Young Rack Ahn

Ho Seok Park

Won Hi Hong

Yun-Seok Lee

Bong Gill Choi

Sung-Chul Yang

An ultrafine continuous fibrous ceramic filter, which comprises a filtering layer of a fibrous porous body, wherein the fibrous porous body comprises continuous ultrafine fibers of metal oxide which are randomly arranged and layered, and powdery nano-alumina incorporated into the ultrafine fibers or coated thereon, the ultrafine fibers being obtained by electrospinning a spinning solution comprising a metal oxide precursor sol-gel solution, and optionally, a polymer resin, and sintering the electrospun fibers, in which the ultrafine fibers have an average diameter of 10&#x2dc;500 nm, and the fibrous porous body has a pore size of maximum frequency ranging from 0.05 to 2 &#x3bc;m, exhibits high filtration efficiency at a high flow rate, and can be regenerated.

Ultrafine continuous fibrous ceramic filter and method of manufacturing same

A dye-sensitized solar cell having improved photoelectric conversion characteristic includes a metal oxide layer having dye-adsorbed metal oxide nanoparticles, wherein the metal oxide nanoparticles are formed by electrospinning a mixed solution of a metal oxide precursor and a polymer into ultrafine composite fibers, and thermally compressing and sintering the ultrafine composite fibers.

Dye-sensitized solar cell with metal oxide layer containing metal oxide nanoparticles produced by electrospinning and method for manufacturing same

An ultrafine fiber-based composite separator comprising a fibrous porous body which comprises ultrafine metal oxide/polymer composite fibers, or ultrafine metal oxide fibers and a polymer resin coating layer formed on the surface thereof, the ultrafine fibers being continuously randomly arranged and layered, and obtained by electrospinning a metal oxide precursor sol-gel solution or a mixture of a metal oxide precursor sol-gel solution and a polymer resin solution, wherein the surface of the metal oxide/polymer composite fibers has a uniform mixing composition of the metal oxide and the polymer resin, in which the separator has a heat shrinkage rate at 150&#x2dc;250&#xb0; C. of 10% or less and does not break down due to melting at a temperature of 200&#xb0; C. or lower, has low heat shrinkage rate, and superior heat resistance and ionic conductivity, being capable of providing improved cycle and power properties when used in manufacturing a battery.

Metal oxide ultrafine fiber-based composite separator with heat resistance and secondary battery using same

The present invention provides a gas sensor, including: a sensor substrate provided with an electrode; and a thin layer of sensor material formed by spraying a solution in which metal oxide nanoparticles are dispersed onto the sensor substrate. The gas sensor is advantageous in that a sensor material is formed into a porous thin layer containing metal oxide nanoparticles having a large specific surface area, thus realizing high sensitivity on the ppb scale and a high reaction rate. Further, the gas sensor is advantageous in that it can be manufactured at room temperature, and the thickness of a sensor material can be easily adjusted by adjusting the spray time, so that a thin gas sensor or a thick gas sensor can be easily manufactured.

Gas sensor using metal oxide nanoparticles, and method for manufacturing same

Disclosed are a graphene composite nanofiber and a preparation method thereof. The graphene composite nanofiber is produced by dispersing graphenes to at least one of a surface and inside of a polymer nanofiber or a carbon nanofiber having a diameter of 1&#x2dc;1000 nm, and the graphenes include at least one type of monolayer graphenes, and multilayer graphenes having a thickness of 10 nm or less. The graphene composite nanofiber can be applied to various industrial fields, e.g., a light emitting display, a micro resonator, a transistor, a sensor, a transparent electrode, a fuel cell, a solar cell, a secondary cell, and a composite material, owing to a unique structure and property of graphene.

Graphene composite nanofiber and preparation method thereof

Disclosed is a method for fabricating a carbon material, by which carbon fibers or carbon tubes, particularly branched carbon fibers or carbon tubes, are obtained via a so-called self-growing process without using external carbon sources. The carbon material obtained by the method has a large specific surface area and further includes a metal catalyst, and thus may be used in cell materials for a fuel cell or secondary battery, hydrogen storage devices, capacitors, solar cells, display panel or the like.

Method of fabricating carbon material, carbon material prepared by the method, cell material and apparatus using the same

A dye-sensitized solar cell comprising a semiconductor electrode prepared by spraying a metal oxide nanoparticle dispersion on a conductive substrate using an electric field to form a metal oxide nanoball layer which is composed of agglomerated metal oxide nanoparticles and has a high porosity and specific surface area, exhibits improved photoelectric properties even when a gel or solid electrolyte is used.

Dye-sensitized solar cell comprising metal oxide nanoball layer and preparation method thereof

The present invention discloses an improved electrode for a supercapacitor and a method of preparation thereof. The inventive electrode comprises a collector, a carbon substrate disposed on the collector comprising ultrafine carbon fibers having a specific surface area of at least 200 m/g (BET) and a dvalue of 0.36 nm or less, and a metal oxide thin layer formed on the carbon substrate. The electrode of the subject invention retains a high specific capacitance during high-speed charging and discharging cycles.

Electrode for supercapacitor having metal oxide deposited on ultrafine carbon fiber and the fabrication method thereof

Growing community of inventors

Daegu, South Korea

Sung-Yeon Jang