One-step construction of MoO_(2)uniform nanoparticles on graphene with enhanced lithium storage

摘要

Transition-metal oxides are considered to be a promising anode material for lithium-ion batteries(LIBs)due to their high capacities,low cost,and ease of synthesis.Herein,a hybrid nanosheet composed of uniform MoO_(2)nanoparticles(NPs)homogeneously immobilized on the reduced graphene oxide nanosheets(MoO_(2)NP@rGO)is first synthesized by a self-templating and subsequent calcination treatment.The unique two-dimensional hybridnanosheets provides several merits.rGO can be used as a favorable support for the loading of electrochemically active MoO_(2)NPs.Meanwhile,MoO_(2)NPs can effectively prevent the stacking of the rGO.The effective combination of MoO_(2)NPs and rGO nanosheets furnish additional electrochemically interfacial active sites for extra lithium ion sto rage.Noticeably,the as-fabricated hybrid nanosheets deliver a reversible capacity of 641 mAh/g after 350 cycles at a current density of 1000 mA/g with a good rate capability.The greatly enhanced lithium storage properties of MoO_(2)NP@rGO indicate the importance of elaborate construction of novel hybrid hierarchical structures.