Lithium-sulfur　(Li-S)　batteries　with　high　energy　density　are　promising　candidates　to　satisfy　emerging　energystorage　demands.　Nevertheless,　the　poor　conductivity　of　sulfur　and　fast　capacity　decay　of　the　sulfur-based　electrodes　restrict　its　practical　applications.　Here,　we　report　a　facile　and　simple　titration　method　to　synthesize　nano-sulfur@liquid-phase　exfoliated　graphene　(Nano-S@LEGr)　composites　by　in　situ　growth　of　nanostructural　sulfur　on　the　LEGr　surface.　The　as-prepared　Nano-S@LEGr　with　tunable　sulfur　morphologies　exhibited　excellent　electrochemical　performance　as　the　cathode　material　for　Li-S　batteries.　In　particular,　the　spherical　Nano-S@LEGr　composites　with　68　wt%　sulfur　displayed　a　reversible　capacity　of　552.8　mAh　g(-1)　after　100　cycles　at　a　current　density　of　0.5C.　Even　at　a　high　current　density　of　1C,　a　discharge　capacity　of　532.8　mAh　g(-1)　could　be　delivered.　Compared　to　rod-like　Nano-S@LEGr　and　the　graphene　oxide　derived　cathode,　the　as-prepared　spherical　Nano-S@LEGr　showed　higher　specific　capacity,　superior　cycling　stability　and　rate　capability.