NOVELTY - A solid oxide redox flow battery comprises a battery cell and redox material in fluid communication with one another, where the redox material comprises a porous structure comprising a metal and carbon, the battery cell being configured to operate between a fuel cell mode and an electrolysis mode, the redox material is configured to receive an inert gas during an initial heating process resulting in removal of gas products including carbon monoxide and carbon dioxide and reduction of a metal oxide of the metal by the carbon according to reaction as given in the specification.    USE - Solid oxide redox flow battery.    ADVANTAGE - The battery has fast rechargeability, thermal cycling, long cycle life, high-performance, low-cost and is safe rechargeable battery.    DETAILED DESCRIPTION - A solid oxide redox flow battery comprises a battery cell and redox material in fluid communication with one another, where the redox material comprises a porous structure comprising a metal and carbon, the battery cell being configured to operate between a fuel cell mode and an electrolysis mode, the redox material is configured to receive an inert gas during an initial heating process resulting in removal of gas products including carbon monoxide and carbon dioxide and reduction of a metal oxide of the metal by the carbon according to reaction as given in the specification, the redox material is further configured to receive steam during the fuel cell mode resulting in oxidation of the metal to form the metal oxide and production of hydrogen, the hydrogen is capable of flowing to the battery cell, the battery cell being configured to electrochemically oxidize the hydrogen during the fuel cell mode to generate steam and electricity, and the redox material is further configured to receive hydrogen produced from the battery cell during the electrolysis mode resulting in reduction of the metal oxide to form the metal and recharge of the redox material. An INDEPENDENT CLAIM is also included for a method for forming a redox material for a solid oxide redox flow battery.