摘要:
An electrode composition comprises a support material that is non-oxidizable at anodic potentials less than about 4 volts, and a catalyst material comprising active electrocatalytic sites. In another embodiment, the electrode can further comprise a proton conductive material (246) disposed on the support and catalyst materials (242, 244). The support material is selected from the group consisting of oxides, nitrides, carbon and metal alloys. Silicon carbide, titanium nitride and diamond are preferred materials for the non-oxidizable support. The electrode is manufactured by mixing the catalyst (244) and support material (242) and forming the mixture into an electrode.
摘要:
The present invention relates to a unique electrochemical cell stack which employs an electrically conductive pressure pad. The pressure pad is composed of material compatible with the electrochemical cell environment and is disposed on the high pressure side of the membrane assembly, in intimate contact with the high pressure side screen pack.
摘要:
An exemplary embodiment of the regenerative electrochemical cell system comprises: a fuel cell module comprising a fuel cell oxygen inlet in fluid communication a water storage device, and a fuel cell hydrogen inlet in fluid communication with both an oxygen source and with a gaseous portion of an water phase separation device; an electrolysis module comprising an electrolysis water inlet in fluid communication with the water storage device via a fuel cell oxygen outlet, and an electrolysis water outlet in fluid communication with the fuel cell hydrogen. One of the embodiments for operating a regenerative electrochemical cell system disclosed herein, comprises: introducing feed hydrogen from a hydrogen storage system to a fuel cell hydrogen electrode and introducing feed oxygen from an oxygen/water phase separation device to a fuel cell oxygen electrode; reacting hydrogen ions with the oxygen to generate electricity and water; once the fuel cell has attained operating conditions, ceasing the feed oxygen from the oxygen/water phase separation device, and introducing second oxygen from a surrounding atmosphere module to the fuel cell oxygen electrode; directing the water to a water storage device; introducing water to an electrolysis water electrode and power to an electrolysis module, to produce refuel hydrogen and oxygen; and directing the refuel hydrogen to the hydrogen storage device.
摘要:
The present invention is an integrated screen comprising a screen portion having openings and an integral protector edge disposed about the periphery of the screen portion. This integrated screen protector edge can be utilized individually as the membrane support/flow field in an electrochemical cell or in conjunction with one or more subsequent screen layers. When utilized with subsequent screen layers, the integrated screen protector edge is disposed adjacent to and in intimate contact with the membrane assembly.
摘要:
An electrochemical cell capable of operating in pressure differentials exceeding about 2,000 psi, using a porous electrode. The porous electrode comprises a catalyst adsorbed on or in a porous support that is disposed in intimate contact and fluid communication with the electrolyte membrane.
摘要:
The electrochemical gas purifier system consists of a cell module with accessory components mounted in a single framework. The module consists of a number of single cells each capable of purifying and ultimately producing hydrogen gas at pressures exceeding 2000 psi. The process comprises introducing a contaminated hydrogen stream to a cell comprising an anode and a cathode with an electrolyte membrane disposed therebetween. The hydrogen is oxidized on the anode to protons which electrochemically migrate across the membrane to the cathode where they recombine with electrons which have passed through an external power source. The contaminants exit the anode side of the cell while the purified hydrogen exits the cathode side of the cell.
摘要:
An integral screen/frame assembly for use in an electrochemical cell (1) for supporting and facilitating the hydration of a solid membrane (8). The screen/frame assembly is comprised of planar screen layers (75) having the frame (70) disposed about the periphery of those layers such that the frame bonds the layers together.
摘要:
Treated porous flow field members (523) are used to support membranes in electrochemical cells and to enhance fluid flow to and for the membrane. The treated porous includes a support material having at least a portion thereof treated with a quantity of hydrophobic polymer, a quantity of hydrophilic polymer, or a quantity of a mixture of a hydrophobic polymer and a hydrophilic polymer. Depending on the type of treatment and the placement of the polymer-treated porous support, various fluid flow enhancements are attained.
摘要:
An electrochemical cell system includes a hydrogen electrode; an oxygen electrode; a membrane disposed between the hydrogen electrode and the oxygen electrode; and a compartmentalized storage tank (42). The compartmentalized storage tank has a first fluid storage section and a second fluid storage section separated by a movable divider. The compartmentalized storage tank is in fluid communication with the electrochemical cell. Further, an electrolyte membrane disposed between and in intimate contact with the hydrogen electrode and said oxygen electrode; an oxygen flow field disposed adjacent to and in intimate contact with the oxygen electrode; a hydrogen flow field disposed adjacent to and in intimate contact with the hydrogen electrode; a water flow field disposed in fluid communication with the oxygen flow field; and a media divider disposed between the oxygen flow field and the water flow field.
摘要:
An integral screen/frame assembly for use in an electrochemical cell (1) for supporting and facilitating the hydration of a solid membrane (8). The screen/frame assembly is comprised of planar screen layers (75) having the frame (70) disposed about the periphery of those layers such that the frame bonds the layers together.