Abstract: An electrochemical cell having a cathode containing an expanded graphite as an electrically conductive carbon material. To provide enhanced service performance in the cell, the expanded graphite has a kerosene absorption in the range of 2.2 to 3.5 ml/g, an average particle size of 17 to 32 micrometers, a d90 value of 40 to 85 micrometers, and an average surface area-to-mass ratio of at least 18 m2/g. A method is also provided for determining an optimum expanded graphite including the steps of measuring physical characteristics of the expanded graphite determining the performance of a cell containing the expanded graphite in the positive electrode, and determining the optimum expanded graphite for use in the cell.

Abstract: A cathode for use in an electrochemical cell having an anode and an electrolyte. The cathode includes a manganese dioxide active material and a titanate additive which includes at least one of SrTiO.sub.3 or CoTiO.sub.3. The cathode of the present invention is particularly adapted for use in an electrochemical cell having a zinc anode and an alkaline electrolyte.

Abstract: A current collector assembly for an electrochemical cell is made by inserting an elongated current collector with identically shaped ends, such as a rod, into a seal body such that a minor amount of the current collector passes through the seal body.

Abstract: A cathode for use in an electrochemical cell having an anode and an electrolyte. The cathode includes a manganese dioxide active material and an additive which includes at least one of SnO.sub.2, Fe.sub.2 O.sub.3 -TiO.sub.2, TiO.sub.2 (P-25), BaTiO.sub.3, K.sub.2 TiO.sub.3, Nb.sub.2 O.sub.5, or SnO. The cathode of the present invention is particularly adapted for use in an electrochemical cell having a zinc anode and an alkaline electrolyte.

Abstract: A cathode for use in an electrochemical cell having an anode and an electrolyte. The cathode includes a manganese dioxide active material and a titanate additive which includes at least one of BaTiO.sub.3 or K.sub.2 TiO.sub.3. The cathode of the present invention is particularly adapted for use in an electrochemical cell having a zinc anode and an alkaline electrolyte.

Abstract: A cathode for use in an electrochemical cell having an anode and an electrolyte. The cathode includes a manganese dioxide active material and an additive which includes SnO.sub.2. The cathode of the present invention is particularly adapted for use in an electrochemical cell having a zinc anode and an alkaline electrolyte.

Abstract: Alkaline cells are substantially free of mercury, and employ a zinc anode gel, which gel has a which expansion of less than 25% after being discharged for 161 minutes to 15% depth of discharge at 2.88A.

Abstract: Alkaline cells are substantially free of mercury, employ a zinc anode and do not exhibit leakage after discharge through an electrical resistor to 1.2 volts and then stored under storage conditions of 21.degree. C. for ninety days.

Abstract: Anode current collectors for electrochemical cells are burnished in a solution containing soluble indium ions.

Abstract: The invention relates to an alkaline zinc cell that uses a conductive anode current collector comprising a conductive substrate, such as a copper-zinc alloy substrate, and wherein the surface of the substrate is coated with a lead-containing layer containing a discontinuous dispersion of lead to effectively reduce gassing at the surface of the anode current collector during storage of the cell.

Abstract: The invention relates to an alkaline cell that uses a lead-containing conductive anode current collector alloy, such as a copper-zinc-lead alloy current collector to effectively reduce gassing at the surface of the anode current collector during storage.

Abstract: A novel form of manganese dioxide is produced by heat treating lambda-manganese dioxide at a temperature of between about 250.degree. C. and about 400.degree. C. This manganese dioxide possesses an x-ray diffraction pattern indicating peaks at 3.11, 2.41, 2.11, 1.62, 1.56, 1.43 and 1.31 angstroms, and exhibits desirable electrochemical activity.

Abstract: A room temperature electrolyte comprising a fused salt mixture of aluminum trichloride and an alkyl pyridinium chloride wherein the alkyl radical is selected from the group consisting of ethyl, methyl, 1-propyl and 1-butyl radicals.

Abstract: A thermally activated reserve battery operable within a temperature range of about 165.degree. to 250.degree. C and composed of a lithium-aluminum alloy anode, a molybdenum pentachloride cathode and a separating electrolyte composed of sodium tetrachloroaluminate.

Abstract: A method for preparing alkyl pyridinium chlorides by effecting a direct reaction between the corresponding alkyl chloride and pyridine.

Abstract: An electrolytic process for removing aluminum from a solid two-phase matrix of aluminum and trialuminum nickelide filaments by passing an electric current between an inert anode, a cathode composed of the matrix while both are immersed in an aluminum halide containing molten salt electrolyte.