| 摘要 |
1,183,956. Electrolytic purification of electrolyte in a fuel cell. UNION CARBIDE CORP. 24 May, 1967 [31 Aug., 1966], No. 24034/67. Heading H1B. [Also in Division C7] Aqueous electrolyte in a fuel cell is cleaned by providing a pair of spaced auxiliary electrodes in the electrolyte in the cell and applying across these a voltage sufficient to cause the precipitation on the electrodes of at least one electrolyte impurity, but insufficient to cause substantial gas bubble formation. Suitable applied voltages are up to 1À4 V, and may be derived from a dry cell or from the fuel cell itself, preferably via an alternator or oscillator. The auxiliary electrodes may be flat, or rods or screens, and may be of Ni, Ni alloys, Pt or graphite in alkaline electrolytes, and of Ta, Ti, Pt or graphite in acid electrolytes. Specific tests involved an 8-cell H 2 /air battery having a 12 N aqueous KOH electrolyte, operatins at 65‹ C., using concentric Ni screen tubes spaced by a polypropylene mesh separator as auxiliary electrodes, with a commercial dry cell connected across them. |
