| 摘要 |
1,154,961. Sintered electrodes. RHEINISCHWESTFALISOHES ELEKTRIZITATSWERK A.G. 2 Aug., 1966 [17 March, 1966; 25 May, 1966], No. 34524/66. Heading H1B. [Also in Division C7] A nickel electrode for alkaline storage batteries is made by sintering a porous nickel containing powder on to a felt of heat resisting insulating material which has a metallized surface of nickel. The felt may be made of glass fibres, silica, ceramic, asbestos or synthetic asbestos and the nickel containing powder preferably consists of graphite flakes or platelets 30 to 50 micron size coated with a layer of nickel 5 to 10 microns thick produced by the electroless deposition of nickel from a nickel salt solution containing sodium borate. The felt may first be coated with silicon or nickel by sputtering and then coated with nickel by electroplating. The electrode may be formed of either (1) a layer of sintered nickel on one face of the felt or (2) a layer of nickel on both faces of the felt, Fig. 2 (not shown) or (3) the sintered nickel sandwiched between two outer layers of felt, Fig. 8 (not shown). The electrodes are formed in a die by applying the required nickel coated graphite powder in layer form on the felt and sintering at 900‹ C. in hydrogen or inert atmosphere. The required leads are sintered on to the electrode during the sintering process. |
