Composite　materials　containing　metal　oxide　and　carbon　with　optimized　structures　have　shown　potential　advantages　in　improving　the　supercapacitor　performance.　Herein,　the　cohesive　porous　Co3O4/C　composites　are　synthesized　via　a　two-step　calcination　of　zeolitic　imidazole　framework-67　(ZIF-67)　single-source　precursor.　The　results　indicate　that　Co3O4　nanopaticles　are　in　situ　incorporated　with　partial　graphitized　carbon.　As　supercapacitor　electrode　material,　the　Co3O4/C　composite　exhibit　higher　specific　capacitance　(875.6　F　g(-1)　at　1　A　g(-1))　and　better　cycling　stability　(capacitance　retention　of　87.8%　after　1000　cycles　at　6　A　g(-1))　compared　to　pure　Co3O4　(245.3　F　g(-1)　and　78.4%　at　the　same　condition).　In　addition,　it　shows　good　cycling　stability　with　capacitance　retention　of　82%　after　1000　cycles　at　6　A　g(-1)　in　the　symmetric　supercapacitor　device.　The　better　electrochemical　performance　can　be　attributed　to　the　improvement　of　the　conductivity,　larger　surface　area　for　more　active　sites,　and　the　ameliorative　volume　expansion　of　Co3O4　by　the　stable　structure　of　Co3O4　nanopaticles　well　embedded　in　partial　graphitized　carbon　matrix　during　long　cycling　process.　(C)　2019　The　Electrochemical　Society.