| 摘要 |
A non-aqueous safe secondary cell (10) is provided. The cell can be repeatedly charged and discharged retaining the excellent safety features. This cell comprises as main components a negative electrode which is Lithium or Lithium alloy, a positive cathode (20) which includes MnO 2 and an electrolyte (22) which is 1,3-Dioxolane with Lithium hexafluoroarsenate (LiAsF 6 ) and a polymerization inhibitor. The cell is made by (i) mixing a particulate cathode active material with a binder, carbon and a saturated olefin solvent; and (ii) heating the mixture to evaporate the solvent. The operational life of an electrochemical secondary cell which is to be exposed to charging conditions of greater than 150 mA is enhanced by initially exposing the cell to a plurality of charge and discharge cycles, each such cycle having a charge rate of no greater than 108 mA and a discharge rate of no smaller than 200 mA. |
