Abstract: The electrolyte is constituted by a conductive vitreous compound having the formula aP.sub.2 S.sub.5, bLi.sub.2 S, cLiX, where X represents chlorine, bromine, or iodine, and where a, b, and c are numbers chosen so that the ratio b/(a+b) lies between 0.61 and 0.70, and so that the ratio c/(a+b+c) is less than or equal to a limit corresponding to the solubility in vitreous phase of LiX in the compound aP.sub.2 S.sub.5, bLi.sub.2 S, with the positive active material comprising 20% to 80% by volume solid electrolyte together with an electron conductor, the improvement wherein a substance chosen from the halogens and the chalcogens is included in the electrolyte in order to produce an in situ chemical reaction at the lithium electrolyte interface thereby creating an ionically conductive bonding layer comprising a lithium halogenide or chalcogenide.

Abstract: A lithium - manganese dioxide cell in which a certain quantity of copper oxyphosphate is added to the manganese dioxide to obtain a second discharge voltage plateau for use in detecting the end of cell life before it is too late.

Abstract: An electrochemical cell having a lithium based negative active material, an electrolyte in the form of a vitreous cation conductive compound having a formula: aP.sub.2 S.sub.5, bLi.sub.2 S, cLiX, where X stands for chlorine, bromine or iodine, and a, b, and c are numbers chosen in such a manner that b/(a+b) lies in the range 0.61 to 0.70 and c/(a+b+c) is less than or equal to the maximum solubility in the vitreous phase of LiX in the compound aP.sub.2 S.sub.5, bLi.sub.2 S, and a positive active material in the form of a compressed powder with particles of the electrolyte dispersed throughout said positive active material. The positive active material is chosen from the group constituted by: (CH.sub.x ; Cu.sub.d O(PO.sub.4).sub.2 ; V.sub.6 O.sub.13 ; V.sub.2 S.sub.5 ; MoS.sub.3 ; CuS; S; CuO; Cu.sub.3 B.sub.2 O.sub.6 ; FeS.sub.2 ; Pb.sub.3 O.sub.4 ; Bi.sub.2 O.sub.3 ; PbO; BiO(CrO.sub.4).sub.2 ; AgBi(CrO.sub.4).sub.2 ; I.sub.2 ; MoO.sub.3 ; WO.sub.3 ; TiS.sub.2 ; NiPS.sub.

Abstract: The sealing between the terminal (1) and the metal wall (2) is provided by a glass seal (3). At least that portion of the terminal which comes into contact with the glass seal is covered with a layer of at least one electrically insulating oxide (4).

Abstract: An electrolyte for an electric cell whose negative active material (4) is constituted by lithium and whose positive active material is constituted by thionyl chloride. The electrolyte contains at least one solvent and at least one solute, said solvent being thionyl chloride and said solute being chosen from the group which includes lithium tetrachloroaluminate and lithium hexachloroantimonate. According to the invention said electrolyte further includes a complex chosen from the group which includes AlCl.sub.3,So.sub.2 and SbCl.sub.5,SO.sub.2.The voltage rise of electric cells which include such an electrolyte takes negligible time. Figure to be published: FIG. 1.

Abstract: A primary cell of high specific energy in which the anode active material (16) is an alkali metal and the cathode active material is sulphur oxychloride which simultaneously acts as an electrolyte solvent, said electrolyte further containing a dissolved salt and a co-solvent. The co-solvent is chosen from among phosphoryl chloride and benzoyl chloride; the dissolved salt is lithium tetrachloroaluminate.

Abstract: A cation conductive vitreous alkaline composition and a method of preparing such a composition.The composition corresponds to a formula of aP.sub.2 S.sub.5, bLi.sub.2 S, cLiX, where:X represents chlorine, bromine or iodine;c is greater than or equal to 0;the ratio b/(a+b) lies between 0.61 and 0.70; andthe ratio c/(a+b+c) is less than or equal to a limitwhich corresponds to solubility in the vitreous phase of LiX in the composition aP.sub.2 S.sub.5, bLi.sub.2 S.

Abstract: The cell includes a positive electrode (3), a negative electrode (4) and an expansion space (15), the gelled electrolyte (5) being disposed between the two electrodes firstly in contact with their electrochemical exchange surfaces and secondly between the negative electrode (4) and the expansion space (15).The surface (14) of the electrolyte (5) in the expansion space is covered partially with a plate (18) which exerts a pressure on the electrolyte (5), which pressure presses the electrolyte closely against the surfaces of the electrodes (3, 4).

Abstract: The invention relates to a solid positive active material for electric cells whose negative active material is an alkali metal. In accordance with the invention, said positive material is a compound formed by two oxides, namely, bismuth oxide Bi.sub.2 O.sub.3 and cupric oxide CuO. Application to lithium cells.