Abstract: The invention relates to the manufacture of manganese dioxide by a chemical process. The resulting product takes the form of gamma manganese dioxide particles characterized by filament-like protrusions of ramsdellite manganese dioxide jutting out from the surface of the particles. The manganese dioxide particles having such features can be manufactured by reacting manganese sulfate with sodium peroxodisulfate in an aqueous solution. The process can be controlled to yield high density manganese dioxide. The manganese dioxide formed in the process can be deposited directly onto the surface of electrolytic manganese dioxide (EMD). The manganese dioxide product is particularly suitable for use as a cathode active material in electrochemical cells.

Abstract: The invention relates to the manufacture of manganese dioxide by a chemical process. The resulting manganese dioxide product takes the form of particles characterized by filament-like protrusions jutting out from its surface. The manganese dioxide particles having such surface features can be manufactured by reacting manganese sulfate with sodium peroxodisulfate in an aqueous solution. The process can be controlled to yield high density manganese dioxide. The manganese dioxide formed in the process can be deposited directly onto the surface of electrolytic manganese dioxide (EMD). The manganese dioxide product is particularly suitable for use as a cathode active material in electrochemical cells.

Abstract: The invention relates to the manufacture of manganese dioxide by a chemical process. The resulting manganese dioxide product takes the form of particles characterized by filament-like protrusions jutting out from its surface. The manganese dioxide particles having such surface features can be manufactured by reacting manganese sulfate with sodium peroxodisulfate in an aqueous solution. The process can be controlled to yield manganese dioxide of varying density and surface area. The manganese dioxide formed in the process can be deposited directly onto the surface of electrolytic manganese dioxide (EMD) or onto the surface of other particles. The manganese dioxide product is particularly suitable for use as a cathode active material in electrochemical cells.

Abstract: The invention relates to the manufacture of manganese dioxide by a chemical process. The resulting manganese dioxide product takes the form of particles characterized by filament-like protrusions jutting out from its surface. The manganese dioxide particles having such surface features can be manufactured by reacting manganese sulfate with sodium peroxodisulfate in an aqueous solution. The process can be controlled to yield high density manganese dioxide. The manganese dioxide formed in the process can be deposited directly onto the surface of electrolytic manganese dioxide (EMD). The manganese dioxide product the is particularly suitable for use as a cathode active material in electrochemical cells.

Abstract: The invention relates to the manufacture of manganese dioxide by a chemical process. The resulting manganese dioxide product takes the form of particles characterized by filament-like protrusions jutting out from its surface. The manganese dioxide particles having such surface features can be manufactured by reacting manganese sulfate with sodium peroxodisulfate in an aqueous solution. The process can be controlled to yield high density manganese dioxide. The manganese dioxide formed in the process can be deposited directly onto the surface of electrolytic manganese dioxide (EMD). The manganese dioxide product the is particularly suitable for use as a cathode active material in electrochemical cells.

Abstract: Mixed heavy metal polysulfides which are insoluble in non-aqueous electrolytes and having the formulaM(1).sub.w.sup.+n M(2).sub.x.sup.+m (S.sub.y).sub.z.sup.-2(wherein M(1) and M(2) are different heavy metal atoms, n and m are integers representing the valence states of M(1) and M(2) respectively, w and x are integers representing the stoichiometry of M(1) and M(2) respectively in the polysulfide, S is sulfur, nw+mx=2z and y is greater than 4.5) are utilized as very high energy density cathodes in non-aqueous electrochemical cells.

Abstract: This invention relates to an improved method for preparing a non-aqueous electrolyte comprising lithium hexafluorophosphate, LiPF.sub.6, and electrochemical cells containing same. In particular the method involves forming LiPF.sub.6 by a chemical reaction in the presence of an ether, whereby a complex of LiPF.sub.6 and the ether is formed and readily isolated. An electrolyte is prepared by dissolving the complex in non-aqueous solvents to the desired concentration.

Abstract: This invention relates to electrochemical cells wherein the cathode comprises ceramics containing copper oxides characterized as perovskites.

Abstract: A totally inorganic non-aqueous rechargeable cell having an alkali or alkaline earth metal anode such as of lithium, a sulfur dioxide containing electrolyte and a discharging metal halide cathode, such as of CuCl.sub.2, CuBr.sub.2 and the like with said metal halide being substantially totally insoluble in SO.sub.2 and admixed with a conductive carbon material.

Abstract: A non-aqueous electrochemical cell having an alkali or alkaline earth metal anode, an inorganic electrolyte comprised of an electrolyte salt and sulfur dioxide and a cathode comprised of CoCl.sub.2.

Abstract: A non-aqueous electrochemical cell having a non-polymerizing substituted dioxolane electrolyte solvent and a highly oxidizing cathode depolarizer particularly manganese dioxide.

Abstract: Heavy metal polysulfides which are insoluble in non-aqueous electrolytes and having the formula M.sub.x.sup.m (S.sub.y) .sub.z.sup.-2 (wherein M is a heavy metal such as iron, cobalt, copper or nickel; S is sulfer; mx=2z; and y is greater than two) are utilized as very high energy density cathodes in non-aqueous electrochemical cells.

Abstract: A fluid cathode depolarized cell having a catalytic cathode comprised of a graphite intercalated metal halide such as CuCl.sub.2, CoCl.sub.2, FeCl.sub.3 and SbF.sub.5.

Abstract: A non-aqueous cell containing a corrosive fluid cathode depolarizer such as thionyl chloride (SOCl.sub.2) and a metal cathode such as of cold rolled steel which is substantially corroded by said fluid depolarizer with the cell having improved high rate discharge characteristics.

Abstract: A method for increasing the recycling life of an electrochemical cell containing a lithium (or other active metal subject to dendritic plating) anode and a clovoborate salt or other salt, which forms soluble oxidizing agents at elevated charging voltages, comprising the step of charging the cell at a potential above normal charging voltage whereby said soluble oxidizing agents are formed.

Abstract: A rechargeable non-aqueous electrochemical cell with a complex electrolyte salt such as a complex of an alkali metal salt and an ether.

Abstract: The safety of a cell such as a Li/MnO.sub.2 cell is improved by complexing the volatile electrolyte solvent normally used therein with the electrolyte salt whereby efficient solvation of the salt is obtained without detrimental free volatile solvent.

Abstract: A fluid depolarized cell containing an inert cathode with finely divided metal powder dispersed within said cathode. The metal powder such as nickel powder catalyzes the reaction of unstable decomposition products of the fluid depolarizer into more stable species. Cell safety and discharge capability are enhanced with reduced cathode passivation.

Abstract: Novel electrolyte salts having high current carrying capability and which substantially prevent voltage delay in cells containing fluid depolarizers such as thionyl chloride (SOCl.sub.2). The salts contain an alkali or alkaline earth metal cation and a halo-gallate indate or thallate anion. The salts additionally preferably contain a chalcogen such as oxygen, sulfur, selenium or tellurium therein.

Abstract: Novel electrolyte salts having high current carrying capability for non-aqueous electrochemical cells particularly those containing fluid depolarizer/electrolyte solvents. The salts have the general formula M(ZX.sub.4).sub.n with "M" being an alkali or alkaline earth metal, "Z" being gallium, .[.indium or thallium,.]. "X" being a halogen and "n" being either 1 or 2.