Lithium-Iron Disulfide Cell Design

An FR6 electrochemical cell comprising:

• an R6 sized container having an external height no greater than about 50.5 mm and an external diameter no greater than about 14.5 mm;
• a jellyroll electrode assembly having less than 200 cm2 of interfacial area between an anode consisting essentially of lithium or lithium-based alloy with a thickness greater than 200 microns and a cathode comprising a mix coated onto a metallic foil current collector, wherein the mix has at least 91 wt. % pyrite and a final solids packing between 58% to 70%;
• an electrolyte consisting essentially of one or more electrolytic salts dissociated in one or more solvents comprising at least 50 vol. % of one or more ethers based on total volume of the solvents, said one or more solvents not including any carbonate-based solvents;
• and
• wherein the cell experiences a comparative drop of R10 resistance in excess of 20% at about 66% depth of discharge during the Digital Still Camera Test.