Conventional　shape-stabilized　phase　change　materials　(PCMs)　often　face　the　challenge　of　simultaneously　accomplishing　excellent　thermal　storage　and　anti-leakage　performances　as　well　as　photo-thermal　conversion　performance.　To　effectively　address　this　issue,　a　mesoporous　surface　dual-scale　carbon　foam　(MDCF)　was　developed　and　employed　as　a　support　for　stearic　acid　(SA)　to　prepare　composite　PCM.　Results　shows　that　the　loading　capacity　of　SA　in　the　MDCF　reaches　78.61　wt%　without　any　leakage　during　phase　transition.　The　SA　was　not　only　filled　into　large　pores　the　MDCF　but　also　infiltrated　into　small　cells　of　its　walls,　leading　to　a　good　interface　bonding　between　SA　and　MDCF.　The　resulting　MDCF/SA　composite　has　a　high　compression　strength　of　10.34　MPa　and　a　thermal　conductivity　of　1.093　W/m·K　increasing　by　4.71　times　that　of　SA.　In　addition,　the　composite　exhibits　a　melting　enthalpy　of　171.9　J/g　and　a　freezing　enthalpy　of　169.9　J/g　with　a　thermal　storage　efficiency　of　up　to　99.49　%.　Meanwhile,　it　displays　a　high　photo-thermal　conversion　efficiency　of　89.5　%　with　an　average　absorbance　of　0.76　in　the　visible　light　spectrum.　Moreover,　the　composite　exhibits　excellent　thermal　reliability　after　600　thermal　cycles　with　a　slight　decrease　in　enthalpy　by　3.37　%.　Consequently,　the　composite　has　significant　potential　for　applications　in　thermal　energy　storage　systems.　©　2024　Elsevier　Ltd