NOVELTY - The electromechanochemical cell comprises a first half-cell comprising a first electrode (1701) to create ions and a first reactant, a second half-cell comprising a second electrode (1702) to reduce ions and a second reactant, a site, an ion resident in the site, a non-conductive material between the first and second electrodes, a mechanical input port, an inclusion containing the site, a non-conductive lattice to contain the inclusion, a colloid containing the site, a non-conductive fluid to suspend the colloid, and a conductive contact separately electrically connected to electrodes.    USE - The electromechanochemical cell is useful in the mobile power and transportation applications.    ADVANTAGE - The electromechanochemical cell can be efficiently fabricated with high specific energy and quickly switched on or off or controlled to provide variable output power.    DETAILED DESCRIPTION - The electromechanochemical cell comprises a first half-cell comprising a first electrode (1701) to create ions and a first reactant, a second half-cell comprising a second electrode (1702) to reduce ions and a second reactant, a site, an ion resident in the site, a non-conductive material between the first and second electrodes, a mechanical input port, an inclusion containing the site, a non-conductive lattice to contain the inclusion, a colloid containing the site, a non-conductive fluid to suspend the colloid, a conductive contact separately electrically connected to the first and second electrodes, a gate insulator, and a gate electrode. The ions are hosted with local stability. The site is moved from the first electrode to the second electrode for completing the current path of the cell. The mechanical energy is interchanged with the ions through the input port by a rate of movement of the site with respect to the second electrode for influencing the current of the cell. The colloid is suspended in the fluid. The gate insulator is interposed between the gate electrode and the conductive contact. A relative position of the ions to the gate electrode is moved. An electrical potential of the ions is influenced by a relative position of the ions to the gate electrode and an independent electrical potential of the gate electrode. The mechanical energy is further interchanged with the electrical potential of the ion influencing the output voltage of the cell. An INDEPENDENT CLAIM is included for an electrochemical half-cell.    DESCRIPTION OF DRAWING(S) - The diagram shows a schematic view of an electromechanochemical cell.    Fuel cell system (1700)    First electrode (1701)    Second electrode (1702)    Ion-hosting inclusion (1703)    Ion transfer platform. (1704)