CATHODE COMPOSITION CONTAINING FLUORINE FOR CARBON DIOXIDE DECOMPOSITION, SOLID OXIDE ELECTROLYSIS

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The challenge of the present invention is to provide a cathode composition doped fluorine of a solid oxide electrolyte to generate carbon monoxide by electrolysis of carbon dioxide with high efficiency and high performance. The first aspect of the present invention for solving the above problem is to provide a cathode composition of a solid oxide electrolyte for carbon dioxide decomposition, comprising a compound of [Formula 1]. [Formula 1] A2-xBO4-y-δFy(wherein A includes one or more elements selected from lanthanum or alkaline earth metals, B includes one or more elements in transition metals or rare earths. x, y is positive between 0 and 0.5, δ is a value that makes the compound of the [Chemical 1] electrically neutral)