Abstract: A fuel cell system having a direct liquid fuel cell that uses a liquid containing a formic acid or an alcohol as a fuel includes: a fuel tank that stores the fuel to be supplied to the fuel cell; a fuel supply device that supplies the fuel in the fuel tank to the fuel cell; and a bubbling device that blows an inert gas into the fuel stored in the fuel tank.

Abstract: A fuel flow groove formed in a fuel electrode current collector of a fuel electrode of a fuel cell includes a plurality of flow groove portions disposed in parallel, and a plurality of return groove portions connecting an end portion of one side edge portion or an end portion of the other side edge portion of the flow groove portions of two adjacent groups. Each of the return groove portions has an inner wall surface portion facing the end portion of the flow groove portions in the return groove portions. The inner wall surface portion has a curved surface shape in which a distance facing each other from the inner wall surface portion to the end portion of the flow groove portions, gradually decreases toward both end portions of the inner side wall surface portion in a direction orthogonal to an extending direction of the flow groove portions.

Abstract: A fuel cell includes a discharge structure that discharges water generated in a cathode electrode in association with an electrode reaction in the MEA to the outside. The discharge structure includes a discharge path through which air that is an oxidant flows, a passage that communicably connects an oxidant supply flow path and the discharge path and that moves water generated in the cathode electrode to the discharge path, and a discharge portion that discharges the generated water moved to the discharge path to the outside.

Abstract: A fuel cell system having a direct liquid fuel cell that uses a liquid containing a formic acid or an alcohol as a fuel includes: a fuel tank that stores the fuel to be supplied to the fuel cell; a fuel supply device that supplies the fuel in the fuel tank to the fuel cell; and a bubbling device that blows an inert gas into the fuel stored in the fuel tank.

Abstract: There is provided a metal fine particle association suitably applied to an electrode catalyst to achieve even higher output leading to reduction in amount of the catalyst used, and a process for producing the same, that is, a metal fine particle association including a plurality of metal fine particles that have a mean particle diameter of 1 nm to 10 nm and are associated to form a single assembly, an association mixture including the metal fine particle association and a conductive support; a premix for forming an association, including metal fine particles, a metal fine particle dispersant made of a hyperbranched polymer, and a conductive support; and a method for producing the association mixture.

Abstract: There is provided a metal fine particle association suitably applied to an electrode catalyst to achieve even higher output leading to reduction in amount of the catalyst used, and a process for producing the same, that is, a metal fine particle association including a plurality of metal fine particles that have a mean particle diameter of 1 nm to 10 nm and are associated to form a single assembly, an association mixture including the metal fine particle association and a conductive support; a premix for forming an association, including metal fine particles, a metal fine particle dispersant made of a hyperbranched polymer, and a conductive support; and a method for producing the association mixture.