Electro-migration,　diffusion-induced　stress　and　their　interaction　have　a　significant　impact　on　the　electrode　materials＇　performance　and　reliability.　However,　electro-migration　is　neglected　in　most　existed　models,　hi　this　work,　a　coupled　electro-chemo-mechanical　model　with　electro-migration　is　developed　by　using　Gauss　law,　mass　balance　and　equilibrium　equation.　The　diffusion　flux　is　separated　into　two　parts:　one　is　the　gradient　of　concentration,　and　the　other　is　the　coupling　terms　including　the　concentration-hydrostatic　pressure　gradient　term　and　the　concentration-electric　potential　gradient　term.　Then　some　numerical　simulations　in　a　hollow　spherical　electrode　of　LiMn2O4　are　carried　out　under　potentiostatic　and　galvanostatic　operations　to　capture　how　the　electro-migration　impacts　on　the　lithium-ion　concentration,　radial　stress　and　hoop　stress.　The　numerical　results　reveal　that　the　electro-migration　plays　a　significant　role　in　the　diffusion　(lithium-ion　concentration)　and　mechanical　deformation　in　the　hollow　spherical　electrode　for　larger　diffusion　time:　when　the　electrical　potential　at　the　inner　surface　is　smaller　than　that　at　the　outer　surface,　the　charging　efficiency　will　be　improved　and　the　stresses　in　the　electrode　will　be　descended.　©　2020　The　Authors.