Patent ID: 7510808

Claim:
A primary electrochemical battery cell, wherein the cell is a primary cell comprising a housing, a negative electrode comprising metallic lithium, a positive electrode, a separator disposed between the negative and positive electrodes, and an electrolyte, and wherein: the positive electrode comprises FeS 2 and, optionally, one or more members selected from the group consisting of FeS, Bi 2 O 3 , CuO, Cu 2 O, CuS and CuS 2 ; the electrolyte consists essentially of at least one solute and an organic solvent; wherein the solute comprises lithium iodide; wherein the organic solvent consists essentially of: (i) a 1,2-dimethoxypropane based solvent, (ii) 1,2-dimethoxyethane, (iii) an optional ether based cosolvent, and (iv) an optional non-ether based cosolvent that, when present, is less than 10 vol. % of the organic solvent and contains no dialkyl carbonates or cyclic carbonates; and wherein the volume ratio of the 1,2-dimethoxypropane based solvent to the 1,2-dimethoxyethane is at least 2 to 1.