摘要:
A fuel cell stack including membrane-electrode assemblies and separators formed between each of the membrane-electrode assemblies is disclosed. The membrane-electrode assemblies may each include an electrolyte membrane, an anode formed on a first surface of the electrolyte membrane, and a cathode formed on a second surface of the electrolyte membrane. Each of the separators may include an anode separator facing the anode and a cathode separator facing the cathode. Each of the separators may include at least two manifolds, a channel separated from the manifolds and facing either the anode or the cathode, and a connection channel fluidly connecting the manifold and the channel. The separator may also include a buffer protrusion system in the connection channel configured to disperse the flow of the fuel or the oxidant.
摘要:
A membrane-electrode assembly for a fuel cell, the membrane-electrode assembly including an electrolyte membrane; an edge protective layer located at generally an edge of the electrolyte membrane; and a catalytic layer including a plate portion contacting the electrolyte membrane and a protruding portion protruding from the plate portion and contacting the edge protective layer.
摘要:
A fuel cell separator and a fuel cell system including the same. The separator includes a main body including a plurality of cell barriers and a flow channel disposed between the cell barriers, and a hydrophilic surface-treatment layer disposed on the bottom surface of the flow channel of the main body. The hydrophilic surface-treatment layer disposed on the bottom surface of the flow channel has a contact angle less than a contact angle of a side surface of at least one of the cell barriers by approximately 10° to approximately 60°.
摘要:
An electrode catalyst for a fuel cell including a carbon-based carrier and an active metal supported in the carrier, for example, an electrode catalyst for a fuel cell includes a carrier and an active metal supported in the carrier, wherein the electrode catalyst has an X value of 95 to 100% in Equation 1. X(%)=(XPS measurement value)/(TGA measurement value)×100 [Equation 1] wherein, the XPS measurement value represents a quantitative amount of the active metal present on a surface of the electrode catalyst, the TGA measurement value represents the XPS measurement value using a monochromated Al Kα-ray, which is the quantitative amount of total active metal supported in the catalyst.
摘要:
A membrane electrode assembly for a fuel cell that secures a flow path of a separator while preventing generation of a pin-hole. The membrane electrode assembly includes an electrolyte membrane for a fuel cell, a microporous layer that is disposed at both surfaces of the electrolyte membrane, a backing layer that is disposed on the microporous layer, and a circumferential edge protective layer that is disposed at an circumferential edge of the electrolyte membrane. An end portion of the microporous layer is positioned further inside of the membrane electrode assembly than an end portion of the backing layer. The circumferential edge protective layer is inserted between the backing layer and the electrolyte membrane.
摘要:
A polymer electrolyte membrane for a fuel cell has a crystalline fusion enthalpy measured by differential scanning calorimetry (DSC) of about 67.3 J/g or more. Such crystallinity improves dimensional stability, mechanical characteristics, and ion conductivity of the polymer electrolyte membrane.
摘要:
A membrane-electrode assembly (MEA) for a fuel cell includes a fuel cell electrolyte membrane, an anode disposed at a first side of the electrolyte membrane, and a cathode disposed at a second side of the electrolyte membrane, wherein the cathode has a thickness and an area, the cathode area extending in a plane substantially parallel to a major surface of the electrolyte membrane, the cathode area includes a central area and a peripheral area, the peripheral area extending to lateral edges of the cathode, the central area includes hydrophilic portions and hydrophobic portions, the peripheral area includes hydrophilic portions and hydrophobic portions, and the central area is more hydrophobic than the peripheral area.
摘要:
A membrane electrode assembly for a fuel cell that secures a flow path of a separator while preventing generation of a pin-hole. The membrane electrode assembly includes an electrolyte membrane for a fuel cell, a microporous layer that is disposed at both surfaces of the electrolyte membrane, a backing layer that is disposed on the microporous layer, and a circumferential edge protective layer that is disposed at an circumferential edge of the electrolyte membrane. An end portion of the microporous layer is positioned further inside of the membrane electrode assembly than an end portion of the backing layer. The circumferential edge protective layer is inserted between the backing layer and the electrolyte membrane.
摘要:
A catalyst for a fuel cell including a carrier and an active metal dispersion that is supported in the carrier is disclosed. The catalyst may have a dispersity (Dp) represented by General Formula 1 and that ranges from between about 0.01 to about 1.0. Dispersity (Dp)={X−X10/(X1−B)}*(B/X)2 [General Formula 1] In the General Formula 1, X, X10, X1, and B are defined the same as described in the specification. A membrane-electrode assembly, and a fuel cell system having the catalyst are also disclosed.
摘要:
A fuel cell stack including an electricity generating unit and a pair of end plates is disclosed. The electricity generating unit includes membrane-electrode assemblies and separators interposed between the membrane-electrode assemblies. The separators have recess portions formed on side faces thereof and may be configured to hold an external device for replacement of a single membrane-electrode assembly within the fuel cell stack. The end plates are located sandwiching the electricity generating unit by using fastening members to press the electricity generating unit.