1. An electronic crossbar system, comprising: a substrate having a top surface and a bottom surface; at least one electrochemical cell comprising a first electrode, a second electrode and an electrolyte, wherein the first electrode is on the top surface of the substrate; at least one pair of crossed wires, wherein a first crossed wire is in electrically conductive contact with the first electrode on the top surface of the substrate, and wherein a second crossed wire is in electrically conductive contact with the bottom surface of the substrate; and electronic instrumentation capable of applying a charge to, reading a charge from, or discharging the at least one electrochemical cell at different rates and measuring potential as a function of time, wherein the instrumentation is in electrically conductive contact with the pair of crossed wires.