Method for preparing insertion compounds of an alkali metal, active materials containing same, and device comprising said active materials

摘要

Process for the preparation of an insertion compound of an alkali metal in which the following successive stages are carried out: a) an organic complex of a transition metal or of a mixture of transition metals M in an oxidation state of greater than 2 is brought into contact with an alkali metal A in the ionic form and with an entity of formula H_b (XO₄), where X is chosen from Si, S, Al, P, Ge, As or Mo and b has a value from 0 to 5, in a liquid medium in a closed chamber; the chamber is brought to a temperature T which makes possible the decomposition of the organic complex in the the said liquid medium; the temperature and the pressure in the chamber are brought back to ambient temperature and atmospheric pressure and the insertion compound for an alkali metal of formula AMXO₄, in which M is in the +2 oxidation state, is recovered.