BATTERY CONSTRUCTION

摘要

1296103 Electric cell UNION CARBIDE CORP 20 Feb 1970 [20 Feb 1969] 8304/70 Heading H4B In an electric-cell, particularly flat thin cells which can be stacked in series to form a battery, the metal anode is physically separated from a cathode-depolarizer mix and adhesively secured directly or indirectly to one surface thereof by a polymeric adhesive thus providing an ionically conductive path between the anode and the mix, and the cathode collector is adhesively secured to the opposite surface of the mix by an electronically conductive polymeric adhesive. The polymeric material is such that it is ionically or electronically conductive or can be made so through use of an appropriate conductive additive. Suitable adhesives include wax, starch, methyl, carboxymethyl-, and hydroxyethyl-cellulose, locust bean gum, gum arabic, gum karaya and gum tragacanth; vinyl polymers preferably polyacrylamide, polyacrylic acid, polyvinyl pyridine, polyvinyl methyl ether, methyl methacrylate and polyvinyl pyrrolidone; polyphosphates; epoxy-amine, melamine formaldehyde and phenolic formaldehyde resins. The ionically conductive polymers can be used as adhesive electrolytes, e.g. the reaction product of polyacrylic acid or polyacrylamide with urea and acetamide. The polymer adhesives can also be used in combination with liquid electrolytes, e.g. aqueous solutions of NH 4 Cl and ZnCl 2 . The cells may be of the Leclanche type or the anode may be made of Ag, Mg, Cd, Cu, Pb, Mn or Al and the cathodic material may be the oxides of Ag, Cu, Ni, Hg, Ce, Pb, the halides of Ag or Cu, LiClO 4 , polyhalides, p-benzoquinone, m-dinitrobenzene, mnitrosobenzene, azo-dicarbonamide, t-butyl peroxyacetate, or perylene-iodine or phenothiazineiodine complexes. Other suitable electrolytes include solid silver sulphide iodide and aqueous solutions of NH 4 Cl, KOH, NaOH, H 2 SO 4 , HCl, sulphamic acid and sulphamates with gelling agents. Preferred cathode collectors are resinous materials impregnated with carbon particles, or a flexible graphite material. In the embodiment shown in Fig. 1, the internally bonded unit cell comprises a zinc anode 12, cathode 14 of MnO 2 , carbon and a binder, a cathode collector 16, electrolyte layer 18 and separator 20. The adjacent layers are held together in physical and electrical contact by adhesive 22a, 22b, 22c.