A　three-dimensional　continuous　network　graphite　nanosheets-based　carbon　foam　(CF)　was　developed　by　vacuum　carbonization　of　nano-Al2O3/epoxy　composites,　and　employed　as　support　to　achieve　a　shape-stabilized　stearic　acid　(SA)/CF　composite　phase　change　material.　The　influence　of　preparation　temperature　of　CF　on　the　thermal　storage　performances　of　the　SA/CF　composites　was　investigated.　Results　indicate　that　the　nano-Al2O3　can　effectively　improve　the　graphitization　degree　of　resulting　CF　and　its　compatibility　with　SA　by　promoting　the　growth　of　graphite　nanosheets.　The　thermal　conductivity　of　SA/CF　composite　increases　with　the　increasing　carbonization　temperature　of　CF.　When　the　carbonization　temperature　is　1700　°C,　the　resulting　CF　(CF-1700)　is　found　as　a　desirable　support　for　SA.　The　as-prepared　SA/CF-1700　composite　has　a　high　thermal　conductivity　of　3.15　W/mK　increasing　by　nearly　1270　%　that　of　SA,　and　meanwhile　presents　a　greatly　enhanced　compressive　strength　of　6.97　MPa　by　about　2.13-folds　compared　with　the　CF-1700.　In　addition,　the　composite　with　good　interfacial　bonding　exhibits　excellent　leakage-prevention　performance　with　a　high　SA　loading　amount　of　77.81　%　during　the　phase　change　process.　In　addition,　its　melting　and　crystallization　enthalpies　arrive　at　176.6　and　179.7　J/g　with　an　enthalpy　efficiency　of　82.67　%,　respectively.　More　importantly,　the　composite　displays　remarkable　chemical　stability　and　thermal　storage　durability　after　200　thermal　cycles,　revealing　great　potential　in　heat　storage　applications.　©　2022　Elsevier　Ltd