| 摘要 |
1,141,568. Fuel cells; secondary cells. AMICON CORP. 1 Sept., 1967 [26 Sept., 1966], No. 40078/67. Heading H1B. A cell according to the invention comprises at least 2 opposing electrodes and a gel between the electrodes and in contact with them, the gel comprising an aqueous electrolyte and a reaction product of (a) a water soluble synthetic organic polymer having anionic groups attached to the polymer chain and (b) a water soluble synthetic organic polymer having cationic groups attached to the polymer chain, the polymers being such that without the ionic groups they would be water-insoluble filmforming materials. The cell may be a leadsulphuric acid accumulator, a silver-zinc battery with an alkaline electrolyte, or a hydrogenoxygen fuel cell with an alkaline or sulphuric acid electrolyte. The ionic polymers should contain at least one ionic group per 6 monomer residues or per 12 chain carbon atoms. Its molecular weight may be 50,000 or more. Polymers specified are polymers and copolymers of sodium styrene sulphonate and vinylbenzyl trimethyl ammonium chloride, polyacrylic acid, hydrolysed copolymers of styrene and maleic anhydride, polyvinyl sulphonic acid, sulphonated polystyrene, sulphonated polyvinyl toluene and alkali metal salts thereof, polyethylene imine, polyvinyl pyridine, polydimethylamino ethyl methacrylate, quaternized polyethylene imine, quaternized dimethylaminoethyl methacrylate and polyvinyl methyl pyridinium chloride. The gel may be formed by adding the two polymers to separate aqueous media containing shielding electrolytes, e.g. NaBr or H 2 SO 4 or by dissolving preformed ionically cross-linked polymer. Up to 10 eq. of one polymer may be used per 1 eq. of the other. Solution may be facilitated by heating or adding a volatile water miscible organic solvent. Gelation may be effected by cooling the solution or boiling off some of the solvent. The gel may contain supporting woven or non- woven fibres of glass, polyethylene or polypropylene and the electrolyte may be added during or after production of the gel. The electrolyte mass may be shaped to fit the cell or made in situ in the cell. In Example 1 a gel prefered from a solution containing Ca(NO 3 ) 2 4H 2 O and 1,4-dioxane or T.H.F. is ground and dissolved in an electrolyte containing methanol and a fluorinated surface active agent. The gel so formed is used in a lead-acid cell having a positive plate between two negative plates. In Example 2 gel prepared using no organic solvent is used in a fuel cell. In Example 3 the gel is used in a lead acid cell with PlautÚ plates. |
