Template-free synthesis of porous V 2 O 5 yolk-shell microspheres as cathode materials for lithium ion batteries

摘要: Abstract The porous V2O5 yolk-shell microspheres have been synthesized via hydro/solvothermal method with subsequent annealing treatment. Due to the volume contraction of solid prepared by reaction and decomposition combustion organics in air, were prepared. Derived from unique structure, show a better electrochemical performance than pristine powder. is tested between 2.0 4.0 V, can deliver high initial capacity 287.2 mA h g−1, good 225.7 mA h−1 be reached at current density 50 mA g−1 after 50 cycles. Moreover, electrode possess higher powder under same rate, for example, 159.5 mA h g−1 vs. 144.6 mA h g−1 2000 mA g−1. Even 1000 mA g−1 voltage range 2.5–4.0 V, also discharge 117.5 mA h g−1 1000