| 摘要 |
A high specific energy electrochemical cell comprises: a negative active material (4) based on an alkali metal or on an alkaline-earth metal; a separator (8); a non-aqueous liquid electrolyte; and a positive electrode comprising a solid active mass (5). The positive mass is provided, on its electrolyte side, with a porous and electron conductive metal covering (12) which does not participate in the electrochemical reaction, whose thickness is of the order of a few microns, and which is in contact with the metal portions serving as a positive current collector. The covering greatly reduces the initial impedance of the cell. |
