METHOD FOR REDUCING ACTIVATION OF LITHIUM SECONDARY BATTERY AND LITHIUM SECONDARY BATTERY HAVING REDUCED ACTIVATION

摘要

There is provided a method for reducing activation of lithium secondary battery comprising at least a cathode comprising micron-sized particles of a compound having the formula C-AxM(XO4)y which have an olivine structure and which carry, on at least a portion of their surface, a deposit of carbon deposited by pyrolysis, the formula AxM(XO4)y being such that: A comprises Li; M comprises Fe(II) or Mn(II) or a mixture thereof; XO4 comprises PO4; and O < x = 2 et O < y = 2, the coefficients x and y being chosen independently so as to ensure electroneutrality of the AxM(XO4)y compound, the method comprising performing at least one charge and/or discharge cycle of the battery at a temperature above about 3O°C. There is also, a lithium secondary battery having the above characteristics and which has a substantially constant capacity within the first hundred (100) charge and/or discharge cycles.