摘要:
A method of operating a high-temperature fuel cell, the method including increasing the temperature of a fuel cell stack the operation of which has stopped; starting the operation of the fuel cell stack and applying at least a portion of a load to the fuel cell stack when the temperature of the fuel cell stack reaches a first temperature; and applying any remaining load to the fuel cell stack when the temperature of the fuel cell stack reaches a second temperature that is higher than the first temperature.
摘要:
A fuel cell includes a cathode, an anode, an electrolyte membrane interposed between the cathode and the anode, and a porous layer containing a moisture retentive material. The anode includes an anode catalyst layer adjacent to the electrolyte membrane and an anode diffusion layer adjacent to the anode catalyst layer, and the porous layer is disposed between the anode catalyst layer and the electrolyte membrane. The performance of the fuel cell can be stably maintained even when a fuel supply is temporarily interrupted due to a malfunction of a pump or clogging of a fuel channel.
摘要:
A microporous thin film, a method of forming the same and a fuel cell including the microporous thin film, are provided. The microporous thin film includes uniform nanoparticles and has a porosity of at least about 20%. Therefore, the microporous thin film can be efficiently used in various applications such as fuel cells, primary and secondary batteries, adsorbents, and hydrogen storage alloys. The microporous thin film is formed on a substrate, includes metal nanoparticles, and has a microporous structure with porosity of 20% or more.
摘要:
A bipolar plate for a fuel cell includes a metal plate and a coating layer disposed on a surface of the metal plate. The coating layer includes a polymer of an oxazine-based compound, particularly, a benzoxazine-based compound and a conducting material. A method of manufacturing the bipolar plate includes coating a surface of a metal plate with a coating layer forming composition including at least one oxazine-based compound, a conducting material, and a solvent; and thermally treating the metal plate coated with the coating layer forming composition. A fuel cell includes the bipolar plate.
摘要:
A direct liquid feed fuel cell includes a membrane electrode assembly (MEA) including an anode electrode and a cathode electrode respectively disposed on either side of an electrolyte membrane. A conductive anode plate and a conductive cathode plate which respectively face the anode electrode and the cathode electrode, and have flow channels therein. Stripe-shaped hydrophilic members are formed on the cathode electrode, cross the flow channels of the conductive cathode plate, and transfer water from the flow channels to the conductive cathode plate. The conductive cathode plate is hydrophilic.
摘要:
An activation method and system to selectively activate defective cells in a laminated fuel cell stack. The system includes a tank to store a polar solvent used to activate the cells; a body including a transfer unit to transfer the polar solvent to the fuel cell stack and a control unit to control the transfer unit; and a nozzle coupled to the body, to be inserted into an inlet manifold of the fuel cell stack. The nozzle has an opening positioned opposite to a channel inlet of at least one non-activated cell of the plurality of cells, to jet the polar solvent into only a channel of the non-activated cell, through the opening.
摘要:
An electrolyte membrane includes a nanocomposite ion complex that is a reaction product of a nanocomposite with a basic polymer. The nanocomposite includes a polymer having a sulfonic acid group and an unmodified clay. Either the unmodified clay has a layered structure and is dispersed in the polymer having the sulfonic acid group, and the polymer is intercalated between layers of the clay or the unmodified clay has an exfoliated structure and the exfoliated layers of the unmodified clay are dispersed in the polymer. The electrolyte membrane shows high mechanical strength, high ionic conductivity, and excellent methanol crossover impeding properties even when the degree of sulfonation of the polymer having the sulfonic acid group is high. When a methanol aqueous solution is used as a fuel, the fuel cell including the electrolyte membrane has a low methanol crossover, and thus, has a high operational efficiency and a long lifetime.
摘要:
A method of manufacturing an anode for a fuel cell including: performing an acid treatment for a carbon-based compound; washing the resultant obtained from the acid treatment with water and then performing a freeze-drying (lyophilization) process; forming a microporous diffusion layer by dispersing the lyophilized resultant in a solvent, coating the dispersed resultant on a porous carbon support, and drying; and forming a catalyst layer on top of the microporous diffusion layer, an anode for a fuel cell obtained according to the method herein, and a fuel cell using the same. An anode having improved efficiency on liquid fuel diffusion can be obtained when using the fuel diffusion layer including the microporous diffusion layer formed of the carbon-based compounds obtained after an acid treatment and a freeze-drying process according to the present invention. A fuel cell having improved performance can be manufactured by using such an anode.
摘要:
A direct liquid feed fuel cell includes a membrane electrode assembly (MEA) including an anode electrode and a cathode electrode respectively disposed on either side of an electrolyte membrane. A conductive anode plate and a conductive cathode plate which respectively face the anode electrode and the cathode electrode, and have flow channels therein. Stripe-shaped hydrophilic members are formed on the cathode electrode, cross the flow channels of the conductive cathode plate, and transfer water from the flow channels to the conductive cathode plate. The conductive cathode plate is hydrophilic.
摘要:
A thin membrane electrode assembly for a fuel cell includes a diffusion layer with openings and thus does not require a separate carbon substrate. The membrane electrode assembly can be used to manufacture a slim, compact fuel cell. The membrane electrode assembly also ensures a quick response and stable electric generation and lowers electrical resistance, thereby enabling a high performance fuel cell to be manufactured. In addition, since no separate carbon substrate is required, the manufacturing costs of the membrane electrode assembly are reduced.