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An alkali metal, solid cathode, nonaqueous electrochemical cell capable of delivering high current pulses, rapidly recovering its open circuit voltage and having high current capacity, is described. The stated benefits are realized by the addition of at least one organic sulfate additive to an elect

An alkali metal, solid cathode, nonaqueous electrochemical cell capable of delivering high current pulses, rapidly recovering its open circuit voltage and having high current capacity, is described. The stated benefits are realized by the addition of at least one organic sulfate additive to an electrolyte comprising an alkali metal salt dissolved in a mixture of a low viscosity solvent and a high permittivity solvent. A preferred solvent mixture includes propylene carbonate, dimethoxyethane and a sulfate additive having at least one unsaturated hydrocarbon containing a C(sp.sup.2 or sp.sup.3 )--C(sp.sup.3) bond unit having the C(sp.sup.3) carbon directly connected to the --OSO.sub.3 -- functional group, or a silyl sulfate or a tin sulfate.

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[ What is claimed is:] [1.] A method for reducing voltage delay in an electrochemical cell activated with a nonaqueous electrolyte, comprising the steps of:a) providing an anode comprising am alkali metal;b) providing a cathode comprising a cathode active material;c) activating the electrochemical c

[ What is claimed is:] [1.] A method for reducing voltage delay in an electrochemical cell activated with a nonaqueous electrolyte, comprising the steps of:a) providing an anode comprising am alkali metal;b) providing a cathode comprising a cathode active material;c) activating the electrochemical cell with the nonaqueous electrolyte operatively associated with the anode and the cathode, the nonagueous electrolyte comprising:i) an additive having the general formula:R.sup.1 OS(.dbd.O).sub.2 OR.sup.2 and being selected from the group consisting of a silyl sulfate, a tin sulfate and an organic sulfate having both R.sup.1 and R.sup.2 being hydrogen atoms or at least one of R.sup.1 and R.sup.2 being an unsaturated organic hydrocarbon containing a C(sp.sup.2 or sp.sup.3) --C (sp.sup.3) bond unit having the C(sp.sup.3) carbon directly connected to the --OSO.sub.3 -- functional group; andii) an alkali metal salt dissolved therein; andd) discharging the cell.