title: Reduced graphene oxide supported highly porous V2O5 spheres as a high-power cathode material for lithium ion batteries.
abstract: Reduced graphene oxide (rGO) supported highly porous polycrystalline V(2)O(5) spheres (V(2)O(5)/rGO) were prepared by using a solvothermal approach followed by an annealing process. Initially, reduced vanadium oxide (rVO) nanoparticles with sizes in the range of 10-50 nm were formed through heterogeneous nucleation on rGO sheets during the solvothermal process. These rVO nanoparticles were oxidized to V(2)O(5) after the annealing process in air at 350 °C and assembled into polycrystalline porous spheres with sizes of 200-800 nm. The weight ratio between the rGO and V(2)O(5) is tunable by changing the weight ratio of the precursors, which in turn affects the morphology of V(2)O(5)/rGO composites. The V(2)O(5)/rGO composites display superior cathode performances with highly reversible specific capacities, good cycling stabilities and excellent rate capabilities (e.g. 102 mA h g(-1) at 19 C).
authors: School of Materials Science and Engineering, Nanyang Technological University, 639798, Singapore.
authors: Xianhong
authors: X
authors: Rui
authors: Jixin
authors: J
authors: Zhu
authors: Daohao
authors: D
authors: Sim
authors: Chen
authors: C
authors: Xu
authors: Yi
authors: Y
authors: Zeng
authors: Huey Hoon
authors: HH
authors: Hng
authors: Tuti Mariana
authors: TM
authors: Lim
authors: Qingyu
authors: Q
authors: Yan
mesh_terms: D011211:Electric Power Supplies; D004566:Electrodes; D004867:Equipment Design; D019544:Equipment Failure Analysis; D006108:Graphite / Q000737:chemistry*; D007477:Ions; D008094:Lithium / Q000737:chemistry*; D008863:Microspheres; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure; D036103:Nanotechnology / Q000295:instrumentation*; D010084:Oxidation-Reduction; D010087:Oxides / Q000737:chemistry; D010316:Particle Size; D016062:Porosity; D017968:Vanadium Compounds / Q000737:chemistry*
chemical_list: D007477:Ions; D010087:Oxides; D017968:Vanadium Compounds; D006108:Graphite; D008094:Lithium; C066075:vanadium pentoxide