Abstract:
PURPOSE: A composite is provided to have ion conductivity and moisturizing ability, thereby providing excellent proton conductivity with a composite film. CONSTITUTION: A composite is represented by chemical formula 1: M(O_3P-A-(PO_3H_2)_x)_2. In chemical formula, M is a quadrivalent metal atom, A is a substituted or unsubstituted C1-20 alkylene group, substituted or unsubstituted C6-20 arylene group, substituted or unsubstituted C2-20 heteroarylene group, substituted or unsubstituted carbon cyclic group, or substituted or unsubstituted heterocyclic group; and x is a number of two or more. A fuel cell contains a composite film which includes the composite and an ion conductive polymer. The content of the composite is 1-50 parts by weight based on 100.0 parts by weight of an ion conductive polymer.
Abstract:
PURPOSE: An electrode for fuel cells, a membrane electrode assembly including the same and a fuel battery are provided to prevent outflow of phosphoric acid which is moving from a catalyst layer to a diffusion layer, thereby enhancing lifetime of the membrane electrode assembly. CONSTITUTION: An electrode for fuel cells(10) comprises a supporter(11) and a diffusion layer(13) which includes a micro pore layer(12) arranged in the supporter, a catalyst layer(14) which is arranged in order to face the micro pore layer, and a barrier layer(15) which is placed between the catalyst layer and the micro pore layer. The barrier layer has bigger average pore size than the average pore size of the micro pore layer and the catalyst layer. The membrane electrode assembly comprises a cathode, an anode which faces with the cathode, and a polymer electrolyte membrane(20) arranged between the cathode and the anode. One or more of the cathode and anode include the electrode.
Abstract:
PURPOSE: A manufacturing method of a high temperature fuel cell is provided to reduce deterioration of a fuel cell according to phosphoric acid outflow, and to reduce operation time of a fuel cell. CONSTITUTION: A manufacturing method of a high temperature fuel cell comprises: a step(S1) of raising temperature of a fuel cell stack; a step(S2) of applying a part of load to fuel cell stack, while starting the fuel cell stack when temperature of the fuel cell stack reaches to a first temperature; a step(S3) of additionally applying residual load when temperature of the fuel cell stack reaches at a second temperature.