| abstract |
The present invention provides a rechargeable electrochemical cell and a composition and structure of an electrochemical cell having an SO 2 solvent-based electrolyte containing any of the compositions and structures. The cathode may include one or more elemental transition metals and/or one or more partially oxidized transition metals. The SO 2 solvent-based electrolyte may include a halide-containing salt additive as an SEI film-forming additive. The anode collector may comprise a carbon-coated metal, an alloy of two or more metals, or a carbon-coated alloy of two or more metals. The electrochemical cell may include additional non-dissolved/solid alkali halide. The compositions, structures and cells can be used in the device. |