NOVELTY - Metal particles are produced by containing a solution having dissolved metal; maintaining the solution at a temperature between 0-100degreesC; immersing anode and cathode partly in the solution; maintaining turbulent flow of the solution; and applying an electric potential across the anode and cathode.    USE - The method is for producing metal particles that can be used directly in a metal/air fuel cell. It can also be used for the recovery of other metals, e.g. magnesium, aluminum, calcium, nickel, copper, cadmium, tin, or lead dissolved in an electrolytic solvent.    ADVANTAGE - The invention produces particles having a size that is related to the size of the surface area of the active zones of a cathode, thus promoting consistent production of particles in a predetermined size range. It enables the particles that are produced to be used directly in a metal/air fuel cell without first having to sort the particles by size; does not require seed particles to initiate particle growth; allows the operation to occur at high current densities to enable construction of a compact efficient device with a high rate of particle output; allows operation to occur at high current density and high liquid flow rate to produce high quality crystalline metal particles over a wide range of reaction solution/dissolved metal concentrations; and provides metal particles that are coherent, mechanically strong, low density, high surface area, and high electrochemical reactivity.    DETAILED DESCRIPTION - Production of metal particles comprises containing a solution including dissolved metal; maintaining the solution at a temperature between 0-100degreesC; immersing an anode at least partly in the solution; immersing a cathode at least partly in the solution; maintaining turbulent flow of the solution past active zone(s); and applying an electric potential across the anode and cathode to create a current density greater than 5 kA/m2 in the active zones to cause metal particles to form on the active zones of the cathode through electrolysis.    DESCRIPTION OF DRAWING(S) - The figure illustrates the production of metal particles.