Improving　the　interfacial　properties　between　the　electrode　materials　and　current　collectors　plays　a　significant　role　in　lithium-ion　batteries.　Here,　four　kinds　of　electrolytic　copper　foils　with　roughness　(Rz)　values　of　1.2,　1.5,　2.2,　and　2.8　mu　m　were　prepared　via　an　electropolishing　technique.　Reducing　the　roughness　of　the　electrolytic　copper　foil　can　effectively　improve　the　wettability　of　the　anode　slurry.　The　electrolytic　copper　foil　with　a　roughness　value　of　1.2　mu　m　shows　the　best　coating　uniformity　of　the　graphite　anode　slurry.　The　battery　with　this　electrolytic　copper　foil　(Rz　=　1.2　mu　m)　as　the　current　collector　exhibits　fifth-cycle　capacities　of　358.7　and　102.5　mAh　g(-1)　at　0.2　and　3.0　C,　respectively,　showing　excellent　rate　capability.　In　addition,　at　0.5　C,　the　battery　exhibits　an　initial　discharge　capacity　of　319.5　mAh　g(-1)　and　a　100th-cycle　capacity　retention　rate　of　98.1%,　demonstrating　a　high　level　of　cycling　performance.　These　results　indicate　that　reducing　the　roughness　of　electrolytic　copper　foil　can　provide　a　feasible　route　to　improve　the　performance　of　lithium-ion　batteries.