Saft-Societe Des Accumulateurs Fixes Et De Traction

Societe Anonyme Dite: Gipelec

Gipelec

Saft, Sa

Societe Anonyme Dite: Saft

Jean-Paul Gabano

Michel Broussely

Jean-Pierre Duchange

Andre Lecerf

Jacques Perichon

Yves Jumel

Jean-Pierre Pereira-Ramos

Jean-Yves Grassien

Richard Messina

A process of making a cathode material for a secondary battery including a lithium anode and application of said material. A process of making a cathode material for a secondary electrochemical battery including a lithium anode, wherein said material corresponds to one of the formulas Li.sub.y Ni.sub.2-y O.sub.2 or LiNi.sub.1-x Co.sub.x O.sub.2, wherein y is a number ranging from 0.84 to 1.22 and x is a number ranging from 0.09 to 0.5, wherein the base is lithium hydroxide, nickel oxide or possibly cobalt oxide, in a powdered form in the desired stoichiometric ratio, and wherein it is heated in air at a temperature ranging from approximately 600.degree. C. to 800.degree. C.

Process of making a cathode material for a secondary battery including a

A cell operable at temperatures between 100.degree. C. and 200.degree. C. includes a non-aqueous electrolyte which comprises at least one solvent belonging to the class of aromatic or aliphatic linear sulfones. The negative active material of the cell may be lithium, for example, and its positive active material is selected from the group constituted by oxides, oxisalts, and sulfides. The electrolyte includes as a solvent, in particular, dimethylsulfone alone or mixed with other aromatic or aliphatic linear sulfones.

Electrochemical cell having a non-aqueous electrolyte

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.

Lithium cell having a solid electrolyte constituted by a conductive

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.3 ; copper bismuthate; and lead bismuthate.

Electrochemical cell including a solid electrolyte made from a cation

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.

Electrolyte for a lithium/thionyl chloride electric cell, a method of

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.

Primary cell of high energy density in which the anode active material

A battery having a lithium anode, an electrolyte solution in which the solvent is an aprotic composition, and cathode in which the positive active material is formed from particles of a lead oxide having the formula PbO.sub.x, where x has values from 1.5 to 1.87. The PbO.sub.x positive active material produces a battery with a high specific energy and a single discharge level.

High specific energy battery having an improved positive active material

An electrical primary cell using lithium as its negative active material and whose positive active material includes thionyl chloride. The electrolyte of the cell is a solution including the thionyl chloride as a solvent. The solute is a complex salt resulting from the reaction of at least one of the following compounds with aluminum chloride:

Lithium primary cell containing thionyl chloride

A high specific energy electric cell having a lithium negative active material, an electrolyte solution of which the solvent is an aprotic liquid, and the positive active material is a derivative of divalent lead oxide, PbO. The lead oxide derivation is a compound of said PbO and an oxide selected from the group comprising the oxides of bismuth, Bi.sub.2 O.sub.3, antimony, Sb.sub.2 O.sub.3, and tin, SnO.sub.2.

High specific energy battery

High energy density electric cells have lithium as the negative active material, a silver salt or a silver oxide as the positive material and a solution comprising one solute and at least two solvents as the electrolyte. According to the invention, the first solvent is chosen from the group of esters and the second is chosen from the group formed by benzene and its substituted derivatives.

High energy density electric cells

The invention relates to a positive active material for primary batteries having high energy density and constituted by a metal salt whose cation is monovalent silver and whose complex anion is composed of a central atom and ligands, for example a ferrocyanide or a ferricyanide. According to the invention, the ligands are at least partly constituted by monovalent anions. Application is to lithium primary batteries of the so-called button type or other conventional constructions useful particularly as energy sources for watches or heart stimulators or pacemakers wherein essential requirements are substantially uniform discharge voltage from inception of use to exhaustion and relatively long life.

Positive active material for primary batteries having high energy density

Electric cell having a positive electrode comprising an active material intimately intermixed with an electronic conductor, a negative electrode and an electrolyte whose solvent is a non-aqueous liquid. According to the invention, the said electronic conductor is selected so as to bring down the discharge voltage peak of the cell occurring at the beginning of the discharge to or close to the desired operative voltage discharge level required in use of the cell. Batteries according to the invention are advantageously used in watches.

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Poitiers, France

Jean-Paul Gabano