Korea Institute of Energy Research

Doo-won Seo

Sun-Dong Kim

Sang-Kuk Woo

Se-Young Kim

Ji-haeng Yu

In-Sub Han

In-sub Han

Jong-Hoon Joo

Min-Soo Suh

Se-young Kim

Kee-Seog Hong

Kang Bai

Hee-Yeon Kim

Seong Ok Han

Nam-Jo Jeong

Guk Hyeon Kwon

Young-hoon Seong

Hee-Lak Lee

Disclosed is a method of manufacturing carbonized fine cellulose, which enables the formation of carbonized nano-sized cellulose by subjecting cellulose to drying, carbonization, and pulverization by means of shock waves using ultrasonic waves and microbubbles, thus realizing mass producibility, making it possible to fabricate a carbonized nano-sized material having uniform quality, and reducing the manufacturing costs. The carbonized fine cellulose is in the form of a nano-sized uniform carbon powder, and can thus be utilized as a catalyst support in various forms, such as fuel cell electrodes, electrodes of energy storage devices such as supercapacitors or secondary batteries, catalyst supports for micro-nano hybrid reactors, etc.

Method of preparing minute carbonized cellulose and method of preparing catalyst support using the same

The present invention relates to a unit cell for a solid-oxide fuel cell and to a solid-oxide fuel cell using same, and, more specifically, relates to: a unit cell for a solid-oxide fuel cell, wherein a fuel charging-and-discharging part and an air charging-and-discharging part are provided perpendicularly to a cathode comprised in the solid-oxide fuel cell; and a solid-oxide fuel cell using same.

Unit cell for solid-oxide fuel cell and solid-oxide fuel cell using same

Disclosed is an insulating bonding part for bonding to a solid electrolyte including beta-alumina, the insulating bonding part comprising a plurality of layers which have different mixing ratios of the alpha-alumina and CaO, wherein the layer closer to the solid electrolyte including the beta-alumina has a higher ratio of the CaO, and wherein the layer farther from the solid electrolyte including the beta-alumina has a higher ratio of the alpha-alumina.

Beta-alumina and alpha-alumina bonding method using alpha-alumina and calcium oxide and thermal to electric converter using the same

Disclosed is an internal current collection structure of a tubular thermal to electric converting cell including an internal electrode, a solid electrolyte and an external electrode. The internal current collection structure includes: a first current collector which closely contacts with the internal electrode of the tubular thermal to electric converting cell; a second current collector which fixes the first porous current collector to the inside of the tubular thermal to electric converting cell and causes the first current collector to be in close contact with the internal electrode; and a lead wire which is a conductive medium and is located between the first current collector and the second current collector.

Internal current collection structure of thermal to electric converting cell and manufacturing method of the same

Disclosed are an open internal electrode AMTEC unit cell, a method for manufacturing the same and a method for connecting circuits. In order to overcome the difficulty in collecting electricity within a conventional AMTEC unit cell, an internal electrode of which a portion is open to the outside, so that the internal electrode and an external electrode can be electrically connected to each other at the outside of the unit cell, and a metal support is used as the internal electrode, so that the internal electrode has durability and stability, and a solid electrolyte is formed in the form of a thin film, and as a result, the AMTEC unit cell has an improved efficiency and a simpler manufacturing process.

AMTEC unit cell with partially opened internal electrode and method for manufacturing the AMTEC cell

Disclosed is a modularized AMTEC cell which does not require a separate collector by using a metal support as an internal electrode, has durability and stability even at a high temperature and a high pressure, very easily joins the cell to a housing by inserting the cell into an insulating portion and sealing, minimizes the number of the parts and expands easily the system scale through the serial-parallel structure.

AMTEC cell and method for manufacturing the AMTEC cell

Disclosed is a material for an electrode having an excellent performance and an excellent durability by maintaining high electrical conductivity and by restraining the growth of the grain at a high temperature. The material can be manufactured by synthesizing composite materials through use of a metallic material of Mo and a ceramic material, and then the composite materials can be used as the electrode.

Manufacturing methods of materials powder for performance improved electrode and using the same electrode and its application

Disclosed herein is a flat-tubular solid oxide cell stack in which the pathway of chemical reactions is long and the temperature and flow rate of feed gas are maintained at uniform levels, thus the efficiency of electrical energy generation is increased when the cell stack is used as a fuel cell, and the purity of generated gas (hydrogen) is increased when the cell stack is used as a high-temperature electrolyzer.

Flat-tubular solid oxide cell stack

The present invention provides a method of preparing a carbon fiber-reinforced silicon carbide composite material, wherein carbon nanotubes are formed in the composite material, and then metal silicon is melted and infiltrated into the composite material, so the amount of unreacted metal is reduced and the strength of the composite material is improved, and provides a carbon fiber-reinforced silicon carbide composite material prepared by the method.

Carbon fiber-reinforced silicon carbide composite material and method of preparing the same

The present invention relates to a solid oxide fuel cell, which includes a plurality of unit cells and a connection layer between the plurality of unit cells, wherein each of the unit cells includes an anode, a cathode and a solid electrolyte between the anode and the cathode, and the connection layer includes i) a first layer containing La-ferrite including one or more selected from the group consisting of Sr, Ca and Ba; and ii) a second layer containing La-ferrite including one or more selected from the group consisting of Sr, Ca and Ba, and one or more cerias selected from the group consisting of GDC (Gd doped ceria), LDC (La-doped ceria) and SDC (Sm-doped ceria), wherein the first layer is in contact with the cathode of each of the unit cells and the second layer is in contact with the anode of each of the unit cells.

Flat tubular or plate type solid oxide fuel cell

Disclosed herein is a method of manufacturing a high-density fiber reinforced ceramic composite material, including the steps of: 1) impregnating a fiber preform material multi-coated with pyrolytic carbon and silicon carbide to form impregnated fiber reinforced plastic composite material; 2)carbonizing the impregnated fiber reinforced plastic composite material to form carbonized fiber composite material; 3) a primary reaction-sintering of the fiber composite material; 4) cooling the primarily reaction-sintered fiber composite material down to room temperature and then impregnating the primarily reaction-sintered fiber composite material with a solution in which a polymer precursor for producing silicon carbide (SiC) is dissolved in a hexane (n-hexane) solvent; and 5) a secondary reaction-sintering of the fiber composite material; and a high-density fiber reinforced ceramic composite material manufactured using the method.

Method for manufacturing high-density fiber reinforced ceramic composite materials

A device for a solid oxide fuel cell or a solid oxide electrolysis cell includes an integral one-piece construction of a current collector and a manifold. The device eliminates the need for a brazing or thermal bonding process for joining the manifold with the current collector, and thus makes it possible to prevent breakdown of the junction formed between the manifold and the current collector, which can lead to gas leakage through the junction, and thus can be used for a long period of time.

Device for solid oxide fuel cell or solid oxide electrolysis cell comprising integral one-piece current collector and manifold

Disclosed herein is a flat-tubular solid oxide cell stack. The cell stack includes a plurality of unit cells which are stacked one on top of another. Each unit cell includes a flat-tubular electrode support made of a porous conductive material. A first-gas flow channel is formed in the electrode support in a longitudinal direction thereof. First gas flows along the first-gas flow channel. A second-gas flow channel is formed on the outer surface of the electrode support. Second-gas flows along the second-gas flow channel. A connection hole is formed on each of opposite ends of the first-gas flow channel of each of the unit cells and communicates with the first-gas flow channel of the adjacent unit cell so that the first gas flows along the unit cells in a zigzag manner in the longitudinal directions of the unit cells.

Growing community of inventors

Daejeon, South Korea

Doo-won Seo