title: Nanostructured bilayered vanadium oxide electrodes for rechargeable sodium-ion batteries.
abstract: Tailoring nanoarchitecture of materials offers unprecedented opportunities in utilization of their functional properties. Nanostructures of vanadium oxide, synthesized by electrochemical deposition, are studied as a cathode material for rechargeable Na-ion batteries. Ex situ and in situ synchrotron characterizations revealed the presence of an electrochemically responsive bilayered structure with adjustable intralayer spacing that accommodates intercalation of Na(+) ions. Sodium intake induces organization of overall structure with appearance of both long- and short-range order, while deintercalation is accompanied with the loss of long-range order, whereas short-range order is preserved. Nanostructured electrodes achieve theoretical reversible capacity for Na(2)V(2)O(5) stochiometry of 250 mAh/g. The stability evaluation during charge-discharge cycles at room temperature revealed an efficient 3 V cathode material with superb performance: energy density of ~760 Wh/kg and power density of 1200 W/kg. These results demonstrate feasibility of development of the ambient temperature Na-ion rechargeable batteries by employment of electrodes with tailored nanoarchitectures.
authors.affiliation: Center for Nanoscale Materials, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois 60439, USA.
authors.forename: Sanja
authors.initials: S
authors.lastname: Tepavcevic
authors.forename: Hui
authors.initials: H
authors.lastname: Xiong
authors.forename: Vojislav R
authors.initials: VR
authors.lastname: Stamenkovic
authors.forename: Xiaobing
authors.initials: X
authors.lastname: Zuo
authors.forename: Mahalingam
authors.initials: M
authors.lastname: Balasubramanian
authors.forename: Vitali B
authors.initials: VB
authors.lastname: Prakapenka
authors.forename: Christopher S
authors.initials: CS
authors.lastname: Johnson
authors.forename: Tijana
authors.initials: T
authors.lastname: Rajh
mesh_terms: D011211:Electric Power Supplies; D004566:Electrodes; D004735:Energy Transfer; D004867:Equipment Design; D019544:Equipment Failure Analysis; D017743:Equipment Reuse; D007477:Ions; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure*; D036103:Nanotechnology / Q000295:instrumentation*; D010316:Particle Size; D012964:Sodium / Q000737:chemistry*; D017968:Vanadium Compounds / Q000737:chemistry*
chemical_list: D007477:Ions; D017968:Vanadium Compounds; D012964:Sodium; C066075:vanadium pentoxide