Abstract: A thermoelectric conversion device may be made of a pair of dissimilar materials conductively joined at opposite sides, wherein at least one of said materials is a metal ion liquid solution. A thermal differential between the opposite sides creates an electric current flow and the liquid metal ion solution resists thermal equilibrium. The liquid metal ion solution may be contained by a substantially nonconductive material, such as vinyl tubing. A plurality of pairs of these dissimilar materials may be joined in series to increase the current output. The metal ion of the liquid solution may be selected, for example, from a group consisting of Lithium (Li), Sodium (Na), and Potassium (K).