Long-Life Rechargeable Ion Batteries Having Ion Reservoirs

An aspect of the present disclosure is an electrochemical device that includes a first electrode, an ion reservoir electronically connected to the electrode by a first circuit, an electrolyte positioned between the first electrode and the ion reservoir and ionically connecting the first electrode and the ion reservoir, and a regulating element, where the regulating element is positioned between the first electrode and the ion reservoir, the regulating element electronically and/or ionically connects the ion reservoir and the first electrode, and the regulating element limits the transfer of at least one of electrons and/or ions between the ion reservoir and the first electrode.