Abstract: A lithium/fluorinated carbon electrochemical cell having the CFx material supported on a titanium current collector screen sputter coated with a noble metal is described. The gold, iridium, palladium, platinum, rhodium and ruthenium-coated titanium current collector provides the cell with higher rate capability, even after exposure to high temperatures, in comparison to cells of a similar chemistry having the CFx contacted to a titanium current collector painted with a carbon coating.

Abstract: Nickel-based alloys are provided for use as a positive electrode current collector in a solid cathode, nonaqueous liquid electrolyte, alkali metal anode active electrochemical cell. The nickel-based alloys are characterized by chemical compatibility with aggressive cell environments, high corrosion resistance and resistance to fluorination and passivation at elevated temperatures, thus improving the longevity and performance of the electrochemical cell. The cell can be of either a primary or a secondary configuration.

Abstract: Heat treating the inner, contact surface of an electrochemical cell casing in an oxidizing atmosphere such as air to render the inner surface thereof essentially contamination free and suitable as a current collector, is described. The casing is preferably of stainless steel and houses the alkali metal-halogen couple in a case-positive configuration. The oxidized cases are ready for cell assembly upon cooling and cell electrical performance is maintained without the need for wet chemical treatment of any kind.

Abstract: A cell construction that makes use of unbalanced electrode components or portions comprising one of the electrodes of an electrochemical cell to provide an end-of-life indication, is described. The unbalanced electrode components can have dissimilar physical dimensions or dissimilar percent loading of electrode active material. This renders the one dissimilar electrode component having the lesser physical dimension, i.e., lesser surface area or thickness, or lesser quantity of electrode active material electrochemically unreactive prior to the other electrode component during the course of cell discharge. Upon the early exhaustion or unreactiveness of the one dissimilar electrode component, the total cell interelectrode working capacity is reduced by a predetermined factor. The remaining functional electrode component provides the cell with sufficient capacity for electrical discharge at a predetermined lower energy level.