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A cathode active material admixture comprising a metal, a metal oxide, a mixed metal oxide or a metal sulfide and fluorinated carbon, is described. A preferred admixture comprises copper-silver-vanadium oxide and CFx. Such a blended cathode active admixture is useful in a nonaqueous electrochemical

A cathode active material admixture comprising a metal, a metal oxide, a mixed metal oxide or a metal sulfide and fluorinated carbon, is described. A preferred admixture comprises copper-silver-vanadium oxide and CFx. Such a blended cathode active admixture is useful in a nonaqueous electrochemical cell discharged for extended periods under a light load interrupted by high rate pulse discharges, such as occurs in an implantable medical device.

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An electrochemical cell dischargeable under both a substantially constant discharge rate and a current pulse discharge application, which comprises: a) an anode comprising an alkali metal; b) a cathode including a cathode mixture of a first cathode active constituent selected from the group consisti

An electrochemical cell dischargeable under both a substantially constant discharge rate and a current pulse discharge application, which comprises: a) an anode comprising an alkali metal; b) a cathode including a cathode mixture of a first cathode active constituent selected from the group consisting of a metal, a metal oxide, a mixed metal oxide and a metal sulfide, and mixtures thereof, wherein the first cathode active constituent is present in the cathode mixture in a first range of about 85% to about 67%, by weight, and wherein the cathode mixture includes fluorinated carbon as a second cathode active constituent present in the cathode mixture in a second range of about 15% to about 33%, by weight; and c) an electrolyte solution operatively associated with the anode and the cathode, wherein the fluorinated carbon provides the cell dischargeable for extended periods of time at the substantially constant discharge rate interrupted by the current pulse application provided by the first cathode active constituent.