The　Liquid　Antimony　Anode-based　Solid　Oxide　Fuel　Cell　(LAA-SOFC)　represents　a　promising　energy　conversion　approach　for　generating　power　using　complex　fuels.　This　study　addresses　the　relationship　between　the　liquid-　-liquid　distribution　of　Sb-Sb2O3　2　O　3　and　the　corresponding　electrochemical　performance　of　LAA-SOFC.　A　2-D　axisymmetric　model　that　incorporates　the　two-phase　flow　of　Sb-Sb2O3,　2　O　3　,　alongside　the　electric　field　and　the　chemical/electrochemical　reactions　is　successfully　developed　to　explore　the　reaction　and　convection　characteristics　of　LAA　in　LAA-SOFC　under　gravitational　influence.　The　model　results　indicate　that　the　density　disparity　between　Sb　and　Sb2O3　2　O　3　can　drive　convection　and　stratification　with　Sb2O3　2　O　3　generation　fostering　continuous　convection　within　the　anode.　The　high　Peclet　number　suggests　that　the　convection　is　the　primary　transport　mechanism　in　the　anode.　The　limited　Sb2O3　2　O　3　reduction　results　in　its　accumulation　in　the　upper　layer,　diminishing　the　effective　reaction　area　and　leading　to　a　rapid　decline　in　discharge　voltage.　However,　the　ionic　conductivity　of　Sb2O3　2　O　3　at　the　Sb/Sb2O3　2　O　3　interface　can　facilitate　approximately　10-20%　of　the　reactions,　marginally　mitigating　the　increase　in　voltage　loss.　To　offset　Sb2O3　2　O　3　accumulation＇s　impact　on　the　electrochemical　reactions,　a　horizontal　tubular　LAA-SOFC　is　designed　and　constructed,　which　can　effectively　sustain　the　discharge　voltage　across　a　broad　Sb2O3　2　O　3　fraction　range　of　0-85%.