Abstract:
본 발명은 탄소섬유 전극의 표면에 산소관능기를 생성하는 레독스 흐름 전지용 탄소섬유 전극의 표면처리 방법을 개시한다. 본 발명은 탄소섬유 전극을 세정하는 단계와, 탄소섬유 전극에 액상의 과산화물을 함침하여 탄소섬유 전극의 표면에 산소관능기를 생성하는 단계와, 탄소섬유 전극을 건조하는 단계를 포함한다. 산소관능기를 생성하는 단계에서는, 과산화물을 가열하거나 과산화물에 압력을 가할 수 있다. 과산화물에 압력을 가하는 단계는, 탄소섬유 전극과 과산화물을 압력용기에 수용하는 단계와, 압력용기를 히팅 체임버 안에 배치하는 단계와, 과산화물이 기화되어 압력용기의 내압이 상승되도록 히팅 체임버 안을 고온 분위기로 조성하는 단계로 이루어진다. 본 발명에 의하면, 전기화학반응에 사용되는 다공성 탄소섬유 전극을 과산화물에 함침하고, 과산화물을 가열하거나 과산화물에 압력을 가하는 등에 의하여 표면처리 함으로써, 탄소섬유 전극의 표면에 산소관능기를 효과적으로 생성할 수 있다. 또한, 다공성 탄소섬유 전극의 전기화학적 성능을 높여 탄소섬유 전극의 표면처리 효율성과 생산성을 향상시킬 수 있다.
Abstract:
The present invention relates to a method of manufacturing a porous carbon electrode and, more particularly, to a method of manufacturing a porous carbon electrode, the method including a heat treating step of improving efficiency of an electrical and chemical reaction. The method of manufacturing a porous carbon electrode according to the present invention comprises the steps of: preparing carbon felt; and increasing a specific surface area by heat-treating the carbon felt at a temperature of 500° or more and activating the surface of the carbon felt. According to the method of manufacturing a porous carbon electrode in accordance with the present invention, manufacturing time can be shortened by shortening heat treatment time, and porous electrodes of uniform quality can be obtained.
Abstract:
The present invention relates to a redox flow battery and, more specifically, to a redox flow battery composed to independently supply an electrolyte to each of a unit electrode cell. The present invention relates to a redox flow battery having a unit electrode cell composed of a pair of electrodes separated into an anode and a cathode, a membrane installed between the electrodes, and a separation plate located to be separated at the outside of the electrode to be stacked in series, and cross supplying a cathode electrolyte and an anode electrolyte stored in each of a cathode electrolyte storing tank and an anode electrolyte storing tank in the stacked electrode cells. The redox flow battery according to the present invention has an advantage of easily measuring and controlling the amount of the electrolyte supplied to each electrode cell.
Abstract:
The present invention provides a method for treating the surface of a fiber reinforced composite material bipolar plate of a fuel cell. The present invention molds a fiber reinforced composite material, wherein a plurality of reinforcement fibers are fixed by a polymer matrix, into a bipolar plate of a fuel cell, and forms a carbonization layer by carbonizing a surplus polymer matrix layer which remains on the surface of the fiber reinforced composite material. The step for forming a carbonization layer is to heat the surplus polymer matrix layer with a flame at a temperature of 1,000 to 3,000°C for 5 seconds or shorter and keep the interval between the surplus polymer matrix layer and the flame with 20 mm. The surplus carbonization matrix layer is carbonized by generating an arc for carbonizing the surplus carbonization layer in the process of applying a high voltage after contacting a carbon electrode with the surface of the bipolar plate or by rubbing the surface of the bipolar plate with a rubbing material. The present invention reduces electricity loss in the stack of a fuel cell and improves efficiency because contact resistance is reduced by forming a conductive carbonization layer in the process of heating the polymer matrix on the surface of the bipolar plate via flame surface treatment, an arc and friction.
Abstract:
PURPOSE: A vacuum thermal insulating structure and a manufacturing method thereof are provided to be lightweight, to secure qualities by improving a mechanical property, to simplify a production process, and to save production costs. CONSTITUTION: A vacuum thermal insulating structure (10) comprises a casing (20), a lining chamber (50), and an insulation inserting member (70). The casing includes an accommodating space and is made of fiber reinforced composite material. The lining chamber is equipped on the casing to maintain airtightness of the casing. The insulation inserting member is accommodated in the accommodating space. The accommodating space is formed to a vacuum.
Abstract:
PURPOSE: A manufacturing method of prepreg is provided to solve existing various problems like graphite-residues remained in a mold, a problem not able to control a thickness of a graphite layer, etc. CONSTITUTION: A manufacturing method of prepreg comprises: a step of providing carbon long fiber-reinforced prepreg in a semi-cured sheet state which is reinforced by using a polymer resin as a base, and by a carbon material; a step of laminating a release film in which a graphite foil is coated on the prepreg; and a step of manufacturing final prepreg coated with the graphite foil by transferring the graphite foil on a surface of the prepreg through a high-temperature pressing process passing the prepreg through a hot roller(107).
Abstract:
본 발명은 굴곡부를 가지는 금속멤브레인의 충격시험장치를 개시한다. 본 발명은 굴곡부를 가지는 금속 멤버레인의 굴곡부를 덮을 수 있도록 굴곡부를 수용하는 수용공간을 가지는 터널형 하우징과, 금속 멤브레인을 지지하도록 터널형 하우징에 결합되는 베이스와, 터널형 하우징의 내면과 굴곡부의 외면 사이에 배치되도록 수용공간에 설치되고 유체를 수용하기 위한 챔버 및 유체가 주입되도록 챔버와 연결된 주입구가 형성되어 있으며 챔버 내부의 압력변화에 따라 외형이 변형될 수 있는 가변형 몸체를 갖는 압력백과, 압력백을 팽창시켜 굴곡부를 가압할 수 있도록 주입구를 통해 챔버에 유체를 공급하며 굴곡부에 압력펄스를 부여하는 충격수단을 구비하는 것이 그 특징이다. 충격수단은 터널형 하우징의 상부에 결합되며 주입구를 통하여 압력백에 유체를 공급하는 유압실린더와, 유압실린더의 내부에서 이동가능하도록 설치되며 주입구의 방향으로 순간적으로 이동하여 굴곡부에 압력펄스를 부여하는 피스톤과, 유압실린더의 측면에 설치되는 릴리프밸브와, 유압실린더의 측면에 설치되어 유압실린더의 압력을 감지하는 압력게이지를 구비한다. 본 발명에 의하면, 터널형 하우징, 압력백, 충격수단 등의 간단한 치구 및 장비를 이용하여 굴곡부를 갖는 금속멤브레인의 충격 특성에 대해 간단하게 시험 평가할 수 있다. 멤브레인, 충격, 내압, 시험
Abstract:
PURPOSE: An insulating structure and an ultra low liquid storage tank comprising the same are provided to enhance the bonding reliability of a strip by effectively preventing bending deformation due to load applied to the strip when the strip is constructed. CONSTITUTION: An insulating structure for an ultra low liquid storage tank comprises a plurality of outer insulating panels(121), a first strip(135), a second strip(136), a plurality of inner insulating panels, a plurality of bridge insulating panels, and a first wall. The outer insulating panels cover the inner wall of the tank. The first strip covers the first gap between two outer insulating panels, which are arranged to face each other in a first direction. The second strip covers the second gap between two outer insulating panels, which are arranged to face each other in a second direction crossing the first direction.
Abstract:
본 발명에 의한 액화천연가스 저장탱크의 용접불량 검출방법은, 액화천연가스가 저장된 저장공간을 기밀시키기 위해 저장공간을 단열시키기 위한 단열층에 결합된 방벽의 용접 부위에서 용접불량을 검출하기 위한 것으로, a) 단열층과 방벽의 사이에 검출용 기체를 주입하는 단계와, b) 검출용 기체를 감지하여 감지신호를 발생할 수 있는 기체 감지장치를 용접 부위에 접근시켜서 용접 부위 주위의 공기 중에 누출된 검출용 기체가 존재하는지 용접 부위 주위의 공기를 감시(Monitoring)하는 단계를 포함한다. 본 발명에 의하면, 검출용 기체와 이를 감지할 수 있는 기체 감지장치를 이용함으로써 1차 방벽의 넓은 용접 부위에 대해 용접불량을 쉽고 효율적으로 검출할 수 있다.
Abstract:
PURPOSE: A shock test device of a metal membrane with a curved part is provided to enable the shock property of a metal membrane to be easily recognized using simple jig and equipment. CONSTITUTION: A shock test device(100) of a metal membrane with a curved part comprises a housing(40), a base(20), a pressure bag and a shock unit(70). The housing comprises a space for holding a curved part. The base is coupled to the housing to support the metal membrane(10). The pressure bag is installed in the space to be arranged between the inner surface of the housing and the outer surface of the curved part. The pressure bag comprises a variable body(62), of which shape is varied according to the pressure change in a chamber. The shock unit applies pressure pulse to the curved part.