Conductive ink and preparation method thereof

The invention discloses conductive ink and a preparation method thereof. The ink comprises a positive charge center formed by a liquid metal simple substance or alloy particles, and a negative charge shell formed by conjugated macromolecules and a charge compensation agent on the surface of the positive charge center, the feed also comprises a functional additive. The preparation method comprises the following steps: weighing and mixing the liquid metal, the conjugated polymer and the charge compensation agent in proportion, and then dispersing the liquid metal into micro-nano liquid drops; and adding the functional additive according to the proportion, stirring and mixing, and cooling to room temperature to obtain the conductive ink. According to the invention, the connection of a conductive path is always kept in a complex environment, stable high conductivity is obtained, the conductivity is 1 * 10 < 4 >-1 * 10 < 6 > S/m, and the change rate of the conductivity is +/-5%; the composite material has the adva