▎ 摘　　要

NOVELTY - Preparing a dispersion comprises (a) applying a mixture comprising graphene and a liquid under pressure and (b) passing the pressurized mixture through an opening. USE - The dispersion is useful for: the preparation of a composite, which conducts electrical current and/or heat, and resists against water; coating surfaces; producing a printing ink; and the mechanical stabilization of the composite, where the coated surface or composite is a printed document, electronic items, an encapsulated electronics, a catalyst or a catalyst system, an electrode, a capacitor, a double-layer capacitor, a lithium-ion battery, a graphene paper, a bar code, an advertising space, a touchpad, a composite populated with cells and/or a printed three-dimensional object comprising e.g. a polymer (all claimed). ADVANTAGE - The dispersion exhibits good storage stability without the addition of stabilizers such as binders and/or surfactants. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for: (1) the dispersion obtained by the above process, provided that graphene does not contain nitrogen and the liquid is not propylene carbonate, where the graphene comprises carboxy group and/or phenolic hydroxy group in deprotonated form and liquid is water, isopropanol or acetone; (2) producing a composite comprising contacting a substrate with the dispersion; and (3) the composite obtained by the above method.