| 摘要 |
1515697 Gas-tight accumulator OLLE LINDSTROM AB 2 Oct 1975 [3 Oct 1974] 40293/75 Heading H1B A gas-tight accumulator, when in charged condition, has a positive electrode of Ag oxide and a negative electrode of Fe; when discharged the positive electrode is Ag and the negative electrode Fe with hydroxides of Fe on its surface; the accumulator is claimed with or devoid of electrolyte; gases developed in the cell are able to contact both the negative and positive electrodes. As shown, cans 1 and 5 of Ni-plated steel coact with seal 6 of vulcanized neoprene or heat-curable epoxy resin to make the cell gas-tight; both the positive electrode 4 and negative electrode 3 may be porous, having pore size 50-100 Á and 15-20 Á respectively. On the electrode 4, the electrolyte may occupy 5-10% of the total volume, and gas 20-40%; the electrolyte may be 1-10 molar KOH, optionally containing gel-former and zincate. The ratio of number of equivalents in the negative electrode : positive electrode may be 1-0À7 : 1, and Cd may be added to the iron. The separator 7, carried on polystyrene ring 8, may be cellulose, "Cellophane" (Registered Trade Mark), nylon, polypropylene or rubber, or alternatively a 3-layer separator may be used, containing (a) ZrO 2 or MgO, (b) asbestos and (c) nylon or polypropylene in the layers. |
