Design and tailoring of three-dimensional graphene–Vulcan carbon–Bi2S3 ternary nanostructures for high-performance lithium-ion-battery anodes

摘要: Design of the structure and morphology electrode materials is crucial for creating short transport pathways lithium ions electrons in high-performance lithium-ion battery systems. Here, a strategy preparing three-dimensional (3D) carbon-based architectures consisting bismuth sulfide (Bi2S3) Vulcan carbon spheres intercalated between graphene sheets proposed. Bi2S3 nanoparticles were successfully deposited on graphene/Vulcan composite via facile ultrasonic route, followed by thermal treatment process achieving high crystallinity. In unique hybrid structure, commercial carbon, low-priced mass produced material, acts as nanospacer, thereby preventing restacking nanosheets thus increasing surface area composite. addition, it also provides an additional electron-transport pathway, electrolyte/electrode interface contact facilitating into bulk Consequently, 3D graphene–Vulcan carbon–Bi2S3 nanocomposite exhibited reversible capacity 702 mA h g−1 (graphene/Vulcan = 3 : 1 wt%) after 100 cycles excellent rate performance compared to graphene–Bi2S3 nanocomposites, demonstrating potential nanocomposites use anode material batteries.