The　electrochemical　and　mechanical　performance　of　lithium-ion　batteries　is　greatly　affected　by　the　porous　electrode　materials　and　dislocation　effect.　A　diffusion-mechanical　coupling　model　of　porous　electrode　particle　with　dislocation　effect　is　developed　under　potentiostatic　operation　in　this　work.　Then,　the　distributions　of　lithium-ion　concentration,　volumetric　strain　and　stress　in　the　electrode　particles　with/without　dislocation　effect　are　analyzed.　Finally,　the　influences　of　porosity　and　tortuosity　on　the　lithium-ion　concentration,　volumetric　strain,　radial　stress,　hoop　stress　and　strain　energy　are　numerically　discussed,　respectively.　The　results　show　that　dislocation　effect　retards　the　diffusion　and　relieves　the　electrode　particle　expansion　and　stresses.　Moreover,　larger　porosity　or　smaller　tortuosity　can　enhance　the　charge　efficiency　and　avoid　electrode　particle　damage　or　crack　nucleation　and　propagation　by　reducing　the　stress　and　strain　energy.　Finally,　from　the　perspective　of　fracture,　dislocation　effect　can　resist　the　crack　propagation　or　avoid　the　formation　of　cracks　during　charge.　This　work　will　provide　some　theoretical　guidance　to　improve　the　charge　efficiency　and　prolong　battery　life.　©　2023　Elsevier　B.V.