Study on Factors Affecting the Properties of Conductive Ink Prepared from Graphite and Polyvinylpyrrolidone

The main components of the conductive ink in this study are graphite and polyvinylpyrrolidone (PVP), with their ratio significantly influencing the ink’s rheological and electrical properties. This research investigates the effect of PVP concentration on conductivity, film adhesion, and ink flexibility; and the influence of graphite content on the ink's conductivity. The results showed that a PVP concentration of 5% and a graphite content of 0.5 g/mL yielded optimal viscosity, adhesion, and electrical conductivity. Moreover, the incorporation of carbon black (CB) into the ink formulation considerably improved its conductivity.