NOVELTY - Producing electric power from aqueous multi-electron oxidant and reducer and for generating discharge fluid involves providing discharge system (101) comprising discharge unit (104) which comprises electrolytic cell stack (105) having electrolytic cells, where each of the cells comprises 5-layer electrolyte-electrode assembly; and facilitating discharge of the discharge unit by transferring electrons from positive electrode of the assembly to the aqueous multi-electron oxidant; and transferring electrons from the reducer to negative electrode of the assembly to produce the electric power.    USE - For producing electric power from an aqueous multi-electron oxidant and a reducer and for simultaneously generating a discharge fluid; and for regenerating an aqueous multi-electron oxidant and a reducer in stoichiometric amounts from a discharge fluid using electric power (claimed).    ADVANTAGE - The method provides mechanically refillable, electrochemical flow battery that provides high energy density and high energy efficiency, generates high electric power at a low cost, and requires short refill time. The method regenerates an oxidant and a fuel simultaneously from a discharge fluid, in stoichiometric amounts, without consumption of extra chemicals and without generating chemical waste.    DETAILED DESCRIPTION - Producing electric power from an aqueous multi-electron oxidant and a reducer and for simultaneously generating a discharge fluid involves providing a discharge system (101) comprising a discharge unit (104) which comprises an electrolytic cell stack (105) having electrolytic cells, where each of the electrolytic cells comprises 5-layer electrolyte-electrode assembly; and facilitating discharge of the discharge unit by transferring electrons from a positive electrode of the 5-layer electrolyte-electrode assembly to the aqueous multi-electron oxidant; and transferring electrons from the reducer to a negative electrode of the 5-layer electrolyte-electrode assembly to produce the electric power in an external electric circuit connected to terminals of the discharge unit and to generate the discharge fluid on consumption of the aqueous multi-electron oxidant and the reducer. An INDEPENDENT CLAIM is included for regenerating an aqueous multi-electron oxidant and a reducer in stoichiometric amounts from a discharge fluid using electric power involving neutralizing the discharge fluid with an excess of a base form of a buffer in a neutralization reactor to produce a solution of a salt form of the discharge fluid; electrolyzing the solution of the salt form of the discharge fluid into an intermediate oxidant at a positive electrode in an electrolysis-disproportionation reactor, where the electrolysis releases the reducer and the base form of the buffer at a negative electrode of the electrolysis-disproportionation reactor, while producing a salt form of the aqueous multi-electron oxidant at the positive electrode via disproportionation of the intermediate oxidant evolving at the positive electrode with an excess of the base form of the buffer, and simultaneously releasing a stoichiometric amount of the base form of the buffer for the neutralization; and converting the salt form of the aqueous multi-electron oxidant produced at the positive electrode into an acid form of the aqueous multi-electron oxidant in an ion exchange reactor.    DESCRIPTION OF DRAWING(S) - The figure shows a view of system for generating an electric power and a discharge fluid from an oxidant fluid and a reducer fluid.    Discharge system (101)    Oxidant tank (102)    Reducer tank (103)    Discharge unit (104)    Electrolytic cell stack (105)