| 摘要 |
1,249,284. Battery electrodes. CANADA DEFENCE MINISTER OF. 26 Jan., 1970 [24 Jan., 1969], No. 3731/70. Heading H1B. [Also in Division C7] A sponge Cd electrode, e.g. anode, for a HgOCd, MnO 2 -Cd or CdO-Cd cell, is prepared by compressing a mixture of CdO and finely divided or filamentary inert electronic conductor, e.g. carbonyl Ni powder, Cu powder, expanded Ni mesh, steel or Ni wool, electrolytic Cu wool, graphite or C black, at a pressure of 1 to 100 p.s.i., and then electrolytically reducing the CdO in an alkaline electrolyte e.g. 30% KOH; the counterelectrode may be Ni foil or MnO 2 . The CdO is preferably a powder of particle size less than 175, e.g. 50-150 microns. The preferred inert conductor is Ni powder having an apparent density less than 2 g./c.c. present in an amount of 5-45% by weight of the total mixture. The Cd electrode may be produced directly or cut from a larger block of the sponge. Electrolytic connection to the sponge Cd may be by Ni foil or wire. |
