| 摘要 |
1280058 Mercury electrodes VARTA GmbH 20 March 1970 [2 April 1969] 13572/70 Heading H1B A rechargeable mercury electrode in the uncharged condition contains mercury in an electrically conductive matrix of large surface area, said matrix comprising a non-noble metal which is resistant to aqueous alkali metal hydroxide and capable of dissolving hydrogen. In the charged condition, the mercury is present as mercury oxide. The matrix may be Raney nickel, iron or cobalt. It may also include other electrically conductive material, e.g. graphite, acetylene black, or amalgamated nickel tinsel and a binder, e.g. polyisobutylene. In typical Example 1, Raney nickel alloy is treated with NaOH and potassium tartrate to remove aluminium, amalgamated by treatment with mercury chloride and HCl, mixed with graphite or nickel tinsel and compressed to form an electrode. This is used against a cadmium electrode with KOH electrolyte. In Example 2, the amalgam is compressed between nickel gauzes to form the electrode. In Example 3, the Raney nickel is treated with hydrazine hydrate before amalgamation. In Example 4, the counter electrode is of zinc. |
