title: Electrospun hierarchical LiV3O8 nanofibers assembled from nanosheets with exposed {100} facets and their enhanced performance in aqueous lithium-ion batteries.
abstract: Hierarchical LiV(3)O(8) nanofibers, assembled from nanosheets that have exposed {100} facets, have been fabricated by using electrospinning combined with calcination. The formation mechanism of hierarchical nanofibers was investigated by X-ray diffraction and scanning electron microscopy. Poly(vinyl alcohol) (PVA) played a dual role in the formation of the nanofibers: besides acting as the template for forming the fibers, it effectively prevented the aggregation of LiV(3)O(8) nanoparticles, thereby allowing them to grow into small nanosheets with exposed {100} facets owing to the self-limitation property of LiV(3)O(8). This nanostructure is beneficial for the insertion/extraction of lithium ions. Meanwhile, the {100} facets have fewer and smaller channels, which may effectively alleviate proton co-intercalation into the electrode materials. Hence, the hierarchical LiV(3)O(8) nanofibers exhibit higher discharge capacities and better cycling stabilities as the anode electrode material for aqueous lithium-ion batteries than those reported previously. We demonstrate that these hierarchical nanofibers have promising potential applications in aqueous lithium-ion batteries.
authors.affiliation: Division of Nanomaterials and Nanochemisty, Hefei National Laboratory for Physical Sciences at Microscale, University of Science and Technology of China, Hefei, Anhui 230026, China.
authors.forename: Lin
authors.initials: L
authors.lastname: Liang
authors.forename: Min
authors.initials: M
authors.lastname: Zhou
authors.forename: Yi
authors.initials: Y
authors.lastname: Xie
mesh_terms: D011211:Electric Power Supplies; D055664:Electrochemical Techniques; D007477:Ions / Q000737:chemistry; D008094:Lithium / Q000737:chemistry*; D049329:Nanostructures / Q000737:chemistry*; D010316:Particle Size; D011142:Polyvinyl Alcohol / Q000737:chemistry; D013499:Surface Properties; D014638:Vanadates / Q000737:chemistry*; D014867:Water / Q000737:chemistry
chemical_list: D007477:Ions; D014867:Water; D014638:Vanadates; D011142:Polyvinyl Alcohol; D008094:Lithium