Solid　oxide　cells　(SOCs)　are　highly　efficient　and　environmentally　benign　devices　that　can　be　used　to　store　renewable　electrical　energy　in　the　form　of　fuels　such　as　hydrogen　in　the　solid　oxide　electrolysis　cell　mode　and　regenerate　electrical　power　using　stored　fuels　in　the　solid　oxide　fuel　cell　mode.　Despite　this,　insufficient　long-term　durability　over　5-10　years　in　terms　of　lifespan　remains　a　critical　issue　in　the　development　of　reliable　SOC　technologies　in　which　the　surface　segregation　of　cations,　particularly　strontium　(Sr)　on　oxygen　electrodes,　plays　a　critical　role　in　the　surface　chemistry　of　oxygen　electrodes　and　is　integral　to　the　overall　performance　and　durability　of　SOCs.　Due　to　this,　this　review　will　provide　a　critical　overview　of　the　surface　segregation　phenomenon,　including　influential　factors,　driving　forces,　reactivity　with　volatile　impurities　such　as　chromium,　boron,　sulphur　and　carbon　dioxide,　interactions　at　electrode/electrolyte　interfaces　and　influences　on　the　electrochemical　performance　and　stability　of　SOCs　with　an　emphasis　on　Sr　segregation　in　widely　investigated　(La,Sr)MnO3　and　(La,Sr)(Co,Fe)O3-delta.　In　addition,　this　review　will　present　strategies　for　the　mitigation　of　Sr　surface　segregation.　Graphic