摘要:
[Object] To provide a gas diffusion electrode capable of a high current density operation of a fuel cell.[Solving means] A gas diffusion electrode including a hydrophilic porous layer having an electrically conductive material and an ion conductive material; and a catalyst layer adjacent to the hydrophilic porous layer, wherein a water transport resistance of the hydrophilic porous layer is smaller than a water transport resistance of the catalyst layer.
摘要:
Provided is an electrocatalyst for solid polymer fuel cells capable of increasing the active surface area for reactions in a catalyst component, increasing the utilization efficiency of the catalyst, and reducing the amount of expensive precious metal catalyst used. Also provided are a membrane electrode assembly that uses this electrocatalyst and a solid polymer fuel cell. An electrocatalyst for a solid polymer fuel cell is provided with a catalyst and solid proton conducting material. A liquid conductive material retention part that retains a liquid proton conducting material that connects the catalyst and solid proton conducting material is provided between the same. The surface area of the catalyst exposed within the liquid conductive material retention part is larger than the surface area of the catalyst in contact with the solid proton conducting material.
摘要:
[Summary][Object] To provide a hydrophilic porous layer for a fuel cell that improves a sub-zero temperature starting ability of the fuel cell.[Solving means] A hydrophilic porous layer comprising electrically conductive material—hydrophilic material aggregates each including hydrophilic materials and electrically conductive materials that intimately contact to one another, the hydrophilic materials being mutually connected to one another to form in the hydrophilic materials a continuous transport path for water, the electrically conductive material—hydrophilic material aggregates forming therebetween a transport path for water vapor, which is characterized in that when it is above −40° C., a water transport resistance Rwater of the water transport path is larger than a water vapor transport resistance Rgas of the water vapor transport path.
摘要:
[Object] To provide a gas diffusion electrode capable of a high current density operation of a fuel cell.[Solving means] A gas diffusion electrode including a hydrophilic porous layer having an electrically conductive material and an ion conductive material; and a catalyst layer adjacent to the hydrophilic porous layer, wherein a water transport resistance of the hydrophilic porous layer is smaller than a water transport resistance of the catalyst layer.
摘要:
Provided is an electrocatalyst for solid polymer fuel cells capable of increasing the active surface area for reactions in a catalyst component, increasing the utilization efficiency of the catalyst, and reducing the amount of expensive precious metal catalyst used. Also provided are a membrane electrode assembly that uses this electrocatalyst and a solid polymer fuel cell. An electrocatalyst for a solid polymer fuel cell is provided with a catalyst and solid proton conducting material. A liquid conductive material retention part that retains a liquid proton conducting material that connects the catalyst and solid proton conducting material is provided between the same. The surface area of the catalyst exposed within the liquid conductive material retention part is larger than the surface area of the catalyst in contact with the solid proton conducting material.
摘要:
This electrode catalyst layer for fuel cells is provided with: an electrode catalyst that comprises a conductive carrier and platinum-containing metal particles supported on the surface of the conductive carrier; and an ionomer that covers the electrode catalyst. This electrode catalyst layer for fuel cells is characterized in that the average thickness of the ionomer is 2.4 nm or less. This electrode catalyst layer for fuel cells is capable of having a good balance between proton transport properties and transport properties for a gas such as an oxidant gas or a fuel gas even in cases where the amount of supported platinum is decreased. In addition, an electrode for fuel cells, a membrane electrode assembly for fuel cells, and a fuel cell, each having good current-voltage characteristics, can be obtained using the above-described electrode catalyst layer for fuel cells.
摘要:
This electrode catalyst layer for fuel cells is provided with: an electrode catalyst that comprises a conductive carrier and platinum-containing metal particles supported on the surface of the conductive carrier; and an ionomer that covers the electrode catalyst. This electrode catalyst layer for fuel cells is characterized in that the average thickness of the ionomer is 2.4 nm or less. This electrode catalyst layer for fuel cells is capable of having a good balance between proton transport properties and transport properties for a gas such as an oxidant gas or a fuel gas even in cases where the amount of supported platinum is decreased. In addition, an electrode for fuel cells, a membrane electrode assembly for fuel cells, and a fuel cell, each having good current-voltage characteristics, can be obtained using the above-described electrode catalyst layer for fuel cells.
摘要:
A performance recovery operation for a fuel cell system effectively restores a fuel electrode such that, upon starting or stopping of operation of the fuel cell, both fuel and oxidizing electrodes are disposed in a hydrogen atmosphere and then the fuel electrode is maintained at a higher potential level than in a normal operation.
摘要:
A performance recovery operation for a fuel cell system effectively restores a fuel electrode such that, upon starting or stopping of operation of the fuel cell, both fuel and oxidizing electrodes are disposed in a hydrogen atmosphere and then the fuel electrode is maintained at a higher potential level than in a normal operation.