초록 ▼

An alkali metal, solid cathode, non-aqueous 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 elec

An alkali metal, solid cathode, non-aqueous 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, 1,2-dimethoxyethane and a sulfate additive having at least one unsaturated hydrocarbon containing a C(sp or sp2)-C(sp3) bond unit having the C(sp3) carbon directly connected to the -OSO3- functional group.

대표청구항 ▼

1. An electrochemical cell, which comprises:a) an anode comprising an alkali metal; b) a cathode comprising a cathode active material; c) a non-aqueous electrolyte operatively associated with the anode and the cathode, the non-aqueous electrolyte comprising a sulfate additive having the general form

1. An electrochemical cell, which comprises:a) an anode comprising an alkali metal; b) a cathode comprising a cathode active material; c) a non-aqueous electrolyte operatively associated with the anode and the cathode, the non-aqueous electrolyte comprising a sulfate additive having the general formula R1OS (=O2) (OR2), wherein at least one of R1 and R2 is selected from the group consisting of: i) an organic group containing at least 3 carbon atoms and having a structure of the type C(sp)-C(sp3) directly connected to the -OSO3- functional group; and ii) an unsaturated inorganic group.