Patent ID: 8496902

Claim:
A process for the preparation of an insertion compound of an alkali metal comprising following steps: 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 Li 2 HPO 4 and with an entity of formula H b (XO 4 ), where X is chosen from the group consisting of Si, S, Al, P, Ge, As and 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 said liquid medium; and b) the temperature and the pressure in the chamber are brought back to ambient temperature and atmospheric pressure and the insertion compound of an alkali metal of formula LiMXO 4 , in which M is in the +2 oxidation state, is recovered, wherein the organic complex comprises the metal M bonded to an organic ligand chosen from compounds of the formula: wherein at least one selected from the group consisting of R 1 , R 2 and R 3 comprises at least one oxygen atom.