| 摘要 |
An electrochemical cell (10) showing improved low temperature performance, said electrochemical cell comprises a cylindrical container (12) having an open end; a top cover (14) sealing the open end; a jellyroll electrode assembly disposed inside of the container, the electrode assembly comprising: an anode (18) consisting essentially of lithium or a lithium-based alloy; a cathode (20) consisting of a mix comprising a conductor, a binder and at least 80 wt. % of iron disulfide coated onto a solid foil current collector (22); and a separator (26) disposed between the anode (18) and the cathode (20); and an electrolyte having a solvent blend consisting essentially of 10-95 wt. % of tetrahydrofuran and 5-90 wt % of 1,3-dioxolane- and a solute selected from the group consisting of: lithium imide, lithium jodide and combinations thereof. Alternatively the electrolyte consists essentially of a solute dissolved in tetrahydrofuran, 1,3-dioxolane and 1,2-dimethoxy ethane or the electrolyte has a solvent blend consisting essentially of 10-95 wt % of tetrahydrofuran-based solvent, 5-90 wt % of 1,3-dioxolane and 0-40 wt % of 1,2-dimethoxy ethane and a solute selected from the group consisting of: lithium imide, lithium iodide and combinations thereof.
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