Abstract:
The present invention relates to a production method of a catalyst layer using an in-situ sol-gel reaction of tetraethoxysilane, and a fuel cell including the catalyst layer produced by the method. According to various perspectives and an embodiment of the present invention, ORR capability is improved by the specific absorption reduction on a platinum catalyst layer of a sulfonic group contained in a nafion ionomer in a high voltage area which have a dominative catalyst role by adding dlfos silica.
Abstract:
PURPOSE: A managing method of operating costs of a stationary fuel cell system is provided to predict the component performance, efficiency, and lifetime base on product information, and to maintain an optimum operation condition based on environmental information. CONSTITUTION: A managing method of operating costs of a stationary fuel cell system comprises a step of receiving product information by a receiving part and receiving environmental information by a calculation part (S10); a step of determining the control method of the stationary fuel cell system in order to reduce operation costs by calculating the operation method according to the purpose of operation based on the received product information and environmental information (S20); and a step of controlling the stationary fuel cell system according to the determined control method (S30). [Reference numerals] (AA) Start; (BB) End; (S10) Input information; (S20) Determine control method; (S30) Control
Abstract:
PURPOSE: A magneli phase titanium oxide with a high specific surface area is provided to secure 35 wt% or more of a metal loading amount due to the high specific surface area and have excellent electric conductivity, high-voltage durability, and a high corrosive resistance under an oxygen atmosphere. CONSTITUTION: A magneli phase titanium oxide has a specific surface area in the range of 3-50m^2/g. The titanium oxide contains 80 wt% or more of Ti4O7 and Ti5O9. The titanium oxide further contains non-stoichiometric titanium oxide of TikO2k-(1+2l)(k is a natural number, wherein 4
Abstract:
PURPOSE: An educational fuel cell power generation demonstration kit is provided to teach electrical energy generation processes using hydrogen generation principles. CONSTITUTION: A fuel supply part(2) electrolyzes water provided from a water storage tank in order to generate hydrogen gas. A hydrogen storage tank(9) stores the generated hydrogen gas and is connected to an opened connection pipe and the water storage tank. A fuel cell(1) generates electrical energy by receiving the hydrogen gas from the hydrogen storage tank. An operation member(3) is operated by receiving the electrical energy generated from the fuel cell.
Abstract:
본 발명은 스택의 체결방법에 관한 것으로, 보다 상세하게는 소형 연료전지의 스택의 기체확산층의 두께가 감소됨에 따라 기체 흐름도 양호하게 되고 물의 배출도 양호하게 되어, 스택이 채용된 소형 연료전지의 경우 연속 운전상태가 양호하게 되고, 스택의 운전 성능이 향상되도록 하는 소형 연료전지의 스택 체결방법에 관한 것이다. 이와 같은 본 발명의 특징은 분리판, 막-전극 집합체인 엠이에이(MEA), 다공성 재질의 기체확산층(GDL)이 위치되어 스택의 체결이 준비되는 스택준비단계; 양측의 분리판이 가압되도록 하여 분리판-기체확산층-엠이에이가 밀착되도록 하는 가압초기단계; 분리판-기체확산층-엠이에이로 되는 스택이 가압되어 다공성 재질의 기체확산층 일측이 분리판의 채널 내부로 침투되도록 하는 채널침투단계; 가압된 스택의 두께가 감소되어 스택의 체결가압을 종료하게 되는 가압체결종료단계가 포함되어 구비되는 것을 특징으로 한다. 연료전지, 스택, 채널, 막-전극 집합체, 기체확산층, 기체, 물, 분리판
Abstract:
본 발명은 연료전지용 막 전극 접합체(Membrane Electrode Assembly, MEA), 및 이의 제조방법에 관한 것으로서, 더욱 상세하게는 고가습 또는 고전류밀도 조건에서 우수한 성능을 나타내는 연료전지용 막 전극 접합체에 관한 것이다. 본 발명에 따른 연료전지용 막 전극접합체를 구성하는 양 전극 촉매층에는 타이타니아 파우더와 같은 무기물질이 첨가되어 있어 전극촉매층에서의 수분제어를 가능케 하는 것을 특징으로 한다. 본 발명에 따른 막 전극 접합체를 포함하는 연료전지는 전극촉매층의 과수분 현상이 억제되어 반응기체의 전달이 원활히 이루어지므로 성능 및 안정성의 향상을 가져온다. 연료전지, 막 전극 접합체, 타이타니아, 과수분현상
Abstract:
PURPOSE: A stack fastening method of a small fuel cell is provided to enable gas flow and water discharge by reducing the thickness of a gas diffusion layer to 25 ~ 50%. CONSTITUTION: A stack fastening method of a small fuel cell comprises the steps of: preparing the fastening of a stack by positioning MEA(12) in the center thereof, a separator(11) at both ends thereof, and a gas diffusion layer(13) between the MEA and the separator; pressurizing the separator at both ends to closely adhere parts; impregnating a part of a porous gas diffusion layer inside a channel(14) of the separator; and finishing the fastening.
Abstract:
PURPOSE: An optimized purging method of a durable fuel cell system is provided to properly remove water from the system with the small amount of energy, and to secure the high energy efficiency. CONSTITUTION: An optimized purging method of a durable fuel cell system at the below zero temperature condition enables the fuel cell system to have the minimum residual water volume by controlling the purging time or the flow amount of purge gas while maintaining the temperature range of 75~95 deg C of the fuel cell system, when the fuel cell system shuts down.
Abstract:
PURPOSE: A fuel cell having a porous gas diffusion layer is provided to enhance the precision of a stack by including reactive gas flow channels, to make a cooling unit designed freely, to maximize electricity transfer efficiency using a metal porous material, and to increase durability to physical stress. CONSTITUTION: A gas diffusion layer(300) for a fuel cell is a porous monolayer of a metal material. A flow path of reactive gas is formed on the side facing to a separator(200). A fuel cell stack(1000) is formed by laminating fuel cell unit cells. The fuel cell unit cells include a membrane electrode assembly(100), the gas diffusion layer which is included on both sides of the membrane electrode assembly, and the separator.