| 摘要 |
An electrochemical cell precursor comprises a housing having an anode terminal exposed to its interior, an electrolyte is in the housing for electrochemically coupling the terminal to a cathode in the housing, a cathode precursor being in the housing, and comprising at least one compound of lithium, manganese and oxygen, which falls in a defined area of an isothermal slice of the Li-Mn-O phase diagram at 20 DEG C. The cell precursor is made by loading the electrolyte and cathode precursor into the housing, such that the anode is electrochemically coupled by the electrolyte to the cathode precursor, being electrochemically insulated therefrom. The cell and its electrodes are made by subjecting the cell precursor to a charging potential whereby the cathode precursor acts as a cathode and becomes activated by loss of lithium which is deposited to form at least part of the anode. The cathode precursor can be made by heating in a reducing atmosphere a compound of lithium, manganese and oxygen. The method avoids the use of metallic lithium which is dangerous to handle and necessitates inert atmospheres. |
