Process for producing highly carbonaceous materials and the highly carbonaceous material obtained

A process for production of a highly carbonaceous material, wherein the process comprises combining a structured precursor comprising a fibre or a set of fibres and a unstructured precursor in the form of a fluid,

• wherein the fluid has a viscosity that is greater than 500 mPa·s−1 and less than 45,000 mPa·s−1 at the temperature at which the combination step takes place, and comprises at least one cyclic organic or aromatic compound in the molten state or in solution at a concentration by weight of less than or equal to 65%,
• wherein the at least one cyclic organic or aromatic compound has a weight percentage of carbon greater than 40% with a molecular weight greater that 500 g/mole,
• wherein the combination step produces a combined precursor corresponding to the structured precursor covered by the unstructured precursor, wherein the process further comprises the following steps:
• a step of thermal and dimensional stabilization of the combined precursor to produce a fibre or a set of fibres covered with a cyclic or aromatic organic compound deposit, and
• a step of carbonization of the fibre or set of fibres covered with a cyclic or aromatic organic compound deposit to produce a highly carbonaceous material.