A fuel cell to provide a higher power density. The fuel cell can be produced by 3D printing in ceramic and has an improved power density by virtue of its spiral shape. In order to better extract the energy generated by the fuel cell, an interconnector sheet can be fastened positively to fastening knobs of the fuel cell by holding eyes. In addition, the interconnector sheet can be fixed by glass solder.

Provided is a fuel cell system including a plurality of fuel cell stacks, in which with a simple configuration, air retention is unlikely to occur in cooling water and a flow rate of the cooling water to each fuel cell stack can be uniformized. In a fuel cell system including a plurality of fuel cell stacks provided with a coolant flow path through which a coolant flows, the plurality of fuel cell stacks are juxtaposed in a horizontal direction, and include a supply pipeline that distributes and supplies the coolant to the coolant flow path, and a discharge pipeline that collects and discharges the coolant that has flowed through the coolant flow path, and the supply pipeline and the discharge pipeline are provided within a formation range where the coolant flow path is formed in the plurality of fuel cell stacks, in a direction of gravity.

A propulsion system comprising a nacelle with an air channel along a longitudinal direction, an electric motor whose output drives a propeller, and a fuel cell, comprising a core outside the air channel, open channels, each of which has an inlet and an outlet opening in the air channel, and, for each open channel, a fuel chamber, an electrolyte between the open channel and the fuel chamber, a cathode, and an anode, each open channel having an inlet surface area which is less than the surface area of an intermediate area between the inlet and the outlet, the surface area of the outlet being smaller than the surface area of the intermediate area. Such a system makes it possible to have the fuel cell close to the electric motor, thereby reducing the lengths of the electrical conductors between them, and consequently improving the operation of the fuel cell.

An electrochemical apparatus includes a reaction layer including a membrane electrode assembly (MEA); and separators respectively stacked on two opposite surfaces of the reaction layer, wherein each separator includes first channels disposed on a first surface thereof and second channels disposed on a second surface thereof, in which the separators are disposed such that the first channels or the second channels thereof face each other with the reaction layer interposed therebetween, simplifying a structure and a manufacturing process.

An electrochemical apparatus includes a reaction layer including a membrane electrode assembly (MEA); and separators respectively stacked on two opposite surfaces of the reaction layer, wherein each separator includes first channels disposed on a first surface thereof and second channels disposed on a second surface thereof, in which the separators are disposed such that the first channels or the second channels thereof face each other with the reaction layer interposed therebetween, simplifying a structure and a manufacturing process.

Disclosed herein are a fuel cell manifold and a fuel cell stack including the same. The manifold may include a cover plate, an air guide plate configured to guide a flow of air in the manifold, a fuel guide plate configured to guide a flow of fuel in the manifold, and an auxiliary plate providing a passage for inflow of air and outflow of fuel.

The present invention relates to a bio electrochemical system for the treatment of organic liquid wastes. The bio electrochemical system comprises a container; at least one tube shaped separator vertically disposed such that it penetrates the container; at least one anode disposed in the external space of the tube shaped separator; at least one cathode disposed in the interior space of the tube shaped separator; and at least one partition plate horizontally disposed such that it forms multistage horizontal flow channels for organic liquid wastes in the container.

To provide an air-cooled fuel cell system configured to efficiently warm up a fuel cell. An air-cooled fuel cell system, wherein the air-cooled fuel cell system comprises: a fuel cell, a reaction air supplier configured to supply reaction air to a reaction air inlet of the fuel cell, a reaction air supply flow path configured to connect the reaction air supplier and the reaction air inlet of the fuel cell, a reaction air discharge flow path configured to connect a reaction air outlet of the fuel cell and the outside of the air-cooled fuel cell system, a housing, a temperature acquirer configured to acquire a temperature of inside air discharged from a cooling air outlet, and a controller; and wherein, based on the temperature measured by the temperature acquirer, the controller controls opening and closing of the opening and closing unit and an opening degree thereof.

An embodiment air-cooled fuel cell includes a cell stack, an air inlet manifold configured to allow air to flow into the cell stack therethrough, an air outlet manifold configured to allow the air to flow out of the cell stack therethrough, and a manifold opening/closing controller disposed at the air inlet manifold or the air outlet manifold and configured to allow or interrupt inflow or outflow of the air based on an operation state of the cell stack.

An alloy member includes a base member that includes a plurality of recesses in a surface and is constituted by an alloy material containing chromium, a plurality of embedded portions that are respectively disposed in the plurality of recesses, and a coating layer that covers the base member and is connected to the plurality of embedded portions. An average value of actual lengths of line segments of the plurality of embedded portions is longer than an average value of straight lengths of straight lines of the plurality of embedded portions in a cross-section of the base member along a thickness direction of the base member. The average value of the actual lengths is 1.10 times or more the average value of the lengths of the straight lines.