This　paper　concerns　the　development　of　a　metal　composite　containing　aluminium　as　phase　change　material　(PCM)　and　alumina　as　structural　supporting　material　(SSM)　by　the　cold　compression-hot　sintering　(CCHS)　approach.　The　microstructural　characteristics,　thermal　and　mechanical　properties　and　thermal　performance　of　the　proposed　composite　are　characterized.　For　comparison,　a　salt　composite　made　of　NaLiCO3　as　PCM　and　MgO　as　SSM　with　the　same　melting　temperature　as　the　proposed　composite　is　also　prepared　and　investigated.　The　results　indicate　that　the　alumina　is　wettable　with　liquid　aluminium　at　elevated　temperature,　establishing　confidence　in　fabrication　of　such　aluminium　composite　through　CCHS　technique.　The　composite　has　good　chemical　compatibility　with　the　melting　temperature　around　660.C,　and　45%　alumina　gives　the　composite　optimal　formulation　at　which　a　thermal　conductivity　of　3.75　W/m.K,　a　mechanical　strength　of　33　MPa　and　a　thermal　energy　storage　density　of　400　kJ/kg　over　temperature　range　of　500-700　degrees　C　can　be　achieved.　The　results　also　indicate　that　the　aluminium　composite　presents　a　higher　thermal　performance　than　the　salt　composite.　At　the　same　working　conditions,　the　aluminium　composite　thermal　conductivity　is　over　twice　as　high　as　that　the　salt　composite　while　maintaining　a　similar　thermal　energy　storage　density　with　salt　composite.