Shear-thinning gel compositions for preparing electronically conductive inks

Abstract

The present invention is directed to a shear-thinning gel composition for producing a dry, water-stable and electronically conductive ink, comprising (a) dispersed electrically conductive graphite flake particles and (b) at least one further type of electronically conductive particles selected from carbon black and conductive pyrolyzed plant carbon components in a specific ratio of (a) to (b) as well as (c) a dissolved binder based on or consisting of shellac dissolved in a suitable solvent, where-in the ratio of the total of the electrically conductive particles (a)+(b) and the dissolved binder (c) and the weight proportion of the electrically conductive particles in the composition are specified. The invention further relates to the dried and electronically conductive inks, methods for producing the gel compositions and the use of these gel compositions for preparing, optionally ink-jet printing or robocasting 2D or 3D print products, in particular for preparing electronic devices, such as, for example, flexible electronic devices, biosensors, logic and memory devices, supercapacitors, batteries, flexible batteries, capacitive sensors, RFID tags, and smart packaging.

Dependencies are inferred from the claim text.