title: Bottom-up approach toward single-crystalline VO2-graphene ribbons as cathodes for ultrafast lithium storage.
abstract: Although lithium ion batteries have gained commercial success owing to their high energy density, they lack suitable electrodes capable of rapid charging and discharging to enable a high power density critical for broad applications. Here, we demonstrate a simple bottom-up approach toward single crystalline vanadium oxide (VO2) ribbons with graphene layers. The unique structure of VO2-graphene ribbons thus provides the right combination of electrode properties and could enable the design of high-power lithium ion batteries. As a consequence, a high reversible capacity and ultrafast charging and discharging capability is achieved with these ribbons as cathodes for lithium storage. A full charge or discharge is capable in 20 s. More remarkably, the resulting electrodes retain more than 90% of the initial capacity after cycling more than 1000 times at an ultrahigh rate of 190C, providing the best reported rate performance for cathodes in lithium ion batteries to date.
authors.affiliation: Department of Mechanical Engineering & Materials Science, Rice University, Houston, Texas 77005, United States. sy13@rice.edu
authors.forename: Shubin
authors.initials: S
authors.lastname: Yang
authors.forename: Yongji
authors.initials: Y
authors.lastname: Gong
authors.forename: Zheng
authors.initials: Z
authors.lastname: Liu
authors.forename: Liang
authors.initials: L
authors.lastname: Zhan
authors.forename: Daniel P
authors.initials: DP
authors.lastname: Hashim
authors.forename: Lulu
authors.initials: L
authors.lastname: Ma
authors.forename: Robert
authors.initials: R
authors.lastname: Vajtai
authors.forename: Pulickel M
authors.initials: PM
authors.lastname: Ajayan
mesh_terms: D011211:Electric Power Supplies; D004566:Electrodes; D004867:Equipment Design; D006108:Graphite / Q000737:chemistry*; D008094:Lithium / Q000737:chemistry*; D049329:Nanostructures / Q000737:chemistry; D010087:Oxides / Q000737:chemistry; D013499:Surface Properties
chemical_list: D010087:Oxides; D006108:Graphite; D008094:Lithium