A process for producing a latent heat storage material

The invention relates to a method of a graphitic starting material selected from the group consisting of natural graphite, expanded graphite and / or graphite fibers and a phase change material selected from the group consisting of sugar alcohols, water, organic acids and their mixtures, aqueous salt solutions for the production of a latent heat storage material , salt hydrates, mixtures of salt hydrates, salt hydrates with paraffins, inorganic and organic salts and eutectic salt mixtures, clathrates and alkali metal hydroxides and mixtures of these materials, in which the graphite raw material before impregnation is treated with the phase-change material with a plasma. The invention further relates to a method for producing a latent heat accumulator and a product manufactured according to the method of latent heat storage material.