| 摘要 |
1489818 Fuel cells SOC GENERALE DE CONSTRUCTIONS ELECTRIQUES ET MECANIQUES ALSTHOM ET CIE 24 Jan 1975 [25 Jan 1974] 3227/75 Heading H1B A fuel cell comprises cathode 2 (carbon, PTFE, and carbon fibres), anode 3, electrolyte 6 and current collectors 9, 10 which may have asymmetrical corrugations and engage alternate cathodes and anodes, and a corrugated separator 12. The anode may have two layers one (Fig. 3, not shown) of catalysed carbon and PTFE and the other an alkaline ion exchange resin or an insoluble hydroxide, e.g. CaOH. Alternatively, the constituents may be combined in a single layer. The electrolyte may be KOH with potassium chloride or sulphate and a buffer, e.g. boric acid, mono- or di-acid phosphates or acetic acid. The fuel may be methanol, hydrocarbons or natural gas or hydrazine. In operation (Fig. 21) methanol is fed by a pump 52 through an injector and is vaporized either by a resistance heater or the heat of the cell. Oxidation at the anode produces CO<SP>2</SP> 3 ions which carbonate the KOH electrolyte. On the cathode side, air is fed by a fan 49 and forms OH ions with the electrolyte. Water vapour is condensed at 7 in the upper part of the anode and flows back into the electrolyte. When the material in the anode has been converted to CO<SP>2</SP> 3 , the compartment 5 is emptied by feeding the electrolyte by a pump 53 to a tank 27 or to another cell. The end of the active phase of the cell may be detected by voltameter, and the end of the decarbonation phase by a CO 2 gas pressure gauge. |
