Layered　Ruddlesden-Popper　La2NiO4+delta　(LNO)　is　reported　to　possess　excellent　oxygen　surface　and　bulk　transport　properties,　but　its　application　as　the　cathode　of　solid　oxide　fuel　cells　is　restrained　by　the　relatively　poor　electrocatalytic　activity.　Here,　we　report　the　incorporation　of　highly　ion-conducting　Er-stabilized　Bi2O3　(ESB)　into　LNO　and　assemble　the　LNO-ESB　composite　cathode　directly　on　zirconia　electrolyte　film　using　a　facile　electrochemical　polarization　approach.　The　results　show　the　presence　of　ESB　remarkably　reduces　the　contact　resistance　at　the　electrode/electrolyte　interface　and　enhances　the　electrocatalytic　activity　and　cation　stability　of　LNO.　The　cell　with　the　LNO-ESB　cathode　generates　a　peak　power　density　of　852　mW　cm(-2)　at　750　degrees　C　with　reasonable　operating　stability　over　200　h.　This　work　demonstrates　the　feasibility　of　incorporating　ESB　to　promote　the　layered　nickelate　cathodes　for　intermediate　temperature　solid　oxide　fuel　cells.　(C)　2019　The　Electrochemical　Society.