| 摘要 |
1489277 Making electrodes for storage cells COMPAGNIE GENERALE D'ELECTRICITE 26 March 1975 [28 March 1974 (2)] 12724/75 Heading H1B A method of making an electrode comprises covering at least part of an electrically conductive core 1 with material 2 which is non- adhesive with respect to an electro-chemically active coating 5 and subsequently applying the coating so that a space 6 is formed between the material and the coating to allow the escape of gas during use of the electrode. The core consists of a sheet of silver plated nickel on each face of which a layer of P.T.F.E. is sprayed. The layers are then sintered and scraped to leave strips 2. Alternatively the strips may be formed using a P.T.F.E. emulsion or by masking portions 3 of the core and spraying it with P.T.F.E. Instead of P.T.F.E., polydichlorodifluoroethylene may be used. Holes 4 are provided in the core to secure the active coating 5 which is formed in a manner similar to that described in Specification 1,406,007. Due to the non- adhesion of the coating 5 with the strips 2 the spaces 6 are formed and allow the escape of hydrogen produced during use of the electrode. In a modification, Fig. 5 (not shown) the core consists of a grating which is packed with a ZnO-P.T.F.E. paste, the gas spaces being formed due to the non-adhesion of the paste with the active coating. |
