(WO9623322-A1)      The method involves supplying H2O (steam) gas to the energy storage reactor containing iron metal operating at a temperature of between about 600 to 800 deg C, to produce iron oxide in the energy storage reactor and H, gas. The H gas is passed to a fuel anode of the at least one electrochemical cell operating as a fuel cell and supplying 0 gas or air to an air cathode of the at least one electrochemical cell operating at a temperature of between about 600 to 1200deg C., to conduct electrical energy along the external leads and produce H2O (steam) along the fuel anode.    The method also entails recirculating the H2O (steam) produced at the fuel anode of the fuel cell to the energy storage bed. the above steps are repeated until complete conversion of iron metal to iron oxide and H, gas for electrical energy recovery form chemical energy storage and, recovering the electrical energy produced.    USE/ADVANTAGE -   For conveying and storing electrical energy in form of chemical potential energy during off-peak electric power plant operation. Relatively compact and energy can be stored indefinitely for later reconversion to electrical energy.    (JP11501448-W)      The method involves supplying H2O (steam) gas to the energy storage reactor containing iron metal operating at a temperature of between about 600 to 800 deg C, to produce iron oxide in the energy storage reactor and H, gas. The H gas is passed to a fuel anode of the at least one electrochemical cell operating as a fuel cell and supplying 0 gas or air to an air cathode of the at least one electrochemical cell operating at a temperature of between about 600 to 1200deg C., to conduct electrical energy along the external leads and produce H2O (steam) along the fuel anode.    The method also entails recirculating the H2O (steam) produced at the fuel anode of the fuel cell to the energy storage bed. the above steps are repeated until complete conversion of iron metal to iron oxide and H, gas for electrical energy recovery form chemical energy storage and, recovering the electrical energy produced.    USE/ADVANTAGE -   For conveying and storing electrical energy in form of chemical potential energy during off-peak electric power plant operation. Relatively compact and energy can be stored indefinitely for later reconversion to electrical energy.    (EP807322-B1)      The method involves supplying H2O (steam) gas to the energy storage reactor containing iron metal operating at a temperature of between about 600 to 800 deg C, to produce iron oxide in the energy storage reactor and H, gas. The H gas is passed to a fuel anode of the at least one electrochemical cell operating as a fuel cell and supplying 0 gas or air to an air cathode of the at least one electrochemical cell operating at a temperature of between about 600 to 1200deg C., to conduct electrical energy along the external leads and produce H2O (steam) along the fuel anode.    The method also entails recirculating the H2O (steam) produced at the fuel anode of the fuel cell to the energy storage bed. the above steps are repeated until complete conversion of iron metal to iron oxide and H, gas for electrical energy recovery form chemical energy storage and, recovering the electrical energy produced.    USE/ADVANTAGE -   For conveying and storing electrical energy in form of chemical potential energy during off-peak electric power plant operation. Relatively compact and energy can be stored indefinitely for later reconversion to electrical energy.