| abstract |
The high-capacity, fast-charging lithium secondary cell is in electrical contact with the current collector of the high-capacity lithium-containing positive electrode in electrical contact with the current collector of the positive electrode electrically connected to the external circuit, and the negative electrode electrically connected to the external circuit. A high capacity cathode, a separator disposed between the cathode and the anode and in ion contact with the cathode and the anode, and an electrolyte in ion contact with the anode and cathode, in which case the total ASI for the cell and the relative for the anode and cathode ASIs are impedances that cause the cathode potential to exceed the potential of metallic lithium while charging above 4C. The current capacity per unit area of each of the anode and cathode is at least 3 mA-h / cm 2 , the total ASI for the cell is less than about 20 mA-cm 2 , the anode has ASI γ 1 and the cathode has ASI γ 2, In this case, the ratio of γ1 to γ2 is about 10 or more. |