A process for synthesizing a material, includes:
(a) providing a plurality of powders including at least one lithiated powder including lithium, at least one TM powder including, for more than 95.0% of its mass, a transition metal chosen from titanium; cobalt, manganese, nickel, niobium, tin, iron and mixtures thereof, and at least one chalcogen powder including, for more than 95.0% of its mass, a chalcogen element chosen from sulfur, selenium, tellurium and mixtures thereof,
(b) preparing a particulate mixture by mixing all the powders of the plurality or by mixing one of the powders of the plurality with a milled material obtained by; milling a particulate assembly formed by mixing at least two of the other powders of the plurality, and
(c) milling the particulate fixture to form the material.