electric power supplying element, consisting of a lithiumanode, a depolarising cathode and a contact making it virtually anhydrous methyl acetate from existing elektrolytoplosmiddel,in which at least one ion supplying compound is solved.

摘要

1,152,530. Cells with non-aqueous. HONEYWELL Inc. 29 March, 1967 [29 March, 1966], No. 14207/67. Heading H1B. The invention comprises a cell having a Li anode, a depolarizing cathode and as electrolyte methyl acetate containing MX 4 -, MX 6 SP3-/SP or MSP1/SPF 6 anions, where M is B, Al or In, MSP1/SP is pSP6/SP, Sb or As and X is halogen, a total of less than 0À5 mol. per cent of MeOH, CH 3 COOH and H 2 O and less than 500 p.p.m. of H 2 O. The anode may comprise Li or a Li alloy supported on a Ni or Ag screen. The cathode may comprise a depolarizer and a conductor, e.g. a mixture of a depolarizer and a finely divided conductor held together by a binder. Depolarizers specified include heavy metal compounds, transition metal compounds, organic oxidizing agents, cyclic active halogen compounds, positive halogen compounds, halogen addition compounds, inorganic peroxides and free halogens such as AgCl, AgF, AgO, CuCl, CuCl 2 , CuF 2 , MnO 2 , Bi 2 O 3 , potassium dichloroisocyanurate, C 2 O 3 (NH 4 ) 2 S 2 O 8 , HgCl 2 , Ni 2 O 3 , MnF 3 , NiF 2 , CoF 3 , CuS, PbO 2 , HgO, anthraquinone, I 2 , trichloromelamine, o-dinitrobenzene, phenyl mercuric nitrate, I 2 O 5 , KIO 4 , KMnO 4 , and K 2 Cr 2 O 7 ,. Conductors specified are graphite, Ag, Cu and Ni. Binders specified are paper fibres, asbestos and cellulose acetate. The cathode material should have a potential at least 2 volts less than that of Li. The electrolyte anions may originate from a salt which will not oxidize lithium, e.g. a potassium, sodium or lithium salt or a salt of an organic base. Salts specified include: LiBF 4 , LiAlCl 4 , LiAlBr 4 , LiInCl 4 , LiPF 6 , LiSbF 6 , morpholinium hexafluorophosphate, NaBF 4 , KAlBr 4 , NaPF 6 , Li 3 InCl 6 and Na 3 AlF 6 . The electrolyte should be of at least 0À1 M concentration and have a conductivity of 10SP-3/SP ohmsSP-1/SP cmSP-1/SP or more. The electrodes may be separated by porous polyethylene, non-woven nylon fibres bonded with a butadiene-acrylonitrile copolymer or porous polypropylene. The cell may be ready for use or " deferred action" type and primary or secondary. In typical Example 1, a lithium on nickel anode and a cathode comprising Bi 2 O 3 , graphite and methyl acetate supported on a silver screen are placed either side of a separator and sealed hermetically into a polyethylene bag. Electrolyte is introduced with a hypodermic syringe. In Examples 50 and 51, multiplate cells are housed in a sealed steel base with a detachable polypropylene lining.