title: Composite of K-doped (NH4)2V3O8/graphene as an anode material for sodium-ion batteries.
abstract: A layer structured K-doped (NH4)2V3O8/graphene (K-NVG) was prepared via a hydrothermal route and then used as an anode material for sodium-ion batteries for the first time. The K-NVG nanosheets have a diameter in the range of 200-500 nm. The K-NVG electrode exhibited stable cycling and a good rate performance with a reversible capacity of 235.4 mA h g(-1), which is much higher than the 90.5 mA h g(-1) value of the (NH4)2V3O8/graphene electrode after 100 cycles at a current density of 100 mA g(-1). Simultaneously, the retention rate was maintained at 82% even after 250 cycles at the current density of 300 mA g(-1). Such good electrochemical properties may be attributed to the K-NVG's stable layered structure.
authors.affiliation: State Key Laboratory of Photocatalysis on Energy and Environment, Fuzhou University, Fuzhou, Fujian 350002, China and Institute of Advanced Energy Materials, Fuzhou University, Fuzhou, Fujian 350002, China. fimer@126.com wei-mingdeng@fzu.edu.cn.
authors.forename: Xin
authors.initials: X
authors.lastname: Liu
authors.affiliation: State Key Laboratory of Photocatalysis on Energy and Environment, Fuzhou University, Fuzhou, Fujian 350002, China and Institute of Advanced Energy Materials, Fuzhou University, Fuzhou, Fujian 350002, China. fimer@126.com wei-mingdeng@fzu.edu.cn.
authors.forename: Zhiwei
authors.initials: Z
authors.lastname: Li
authors.affiliation: State Key Laboratory of Photocatalysis on Energy and Environment, Fuzhou University, Fuzhou, Fujian 350002, China and Institute of Advanced Energy Materials, Fuzhou University, Fuzhou, Fujian 350002, China. fimer@126.com wei-mingdeng@fzu.edu.cn.
authors.forename: Hailong
authors.initials: H
authors.lastname: Fei
authors.affiliation: State Key Laboratory of Photocatalysis on Energy and Environment, Fuzhou University, Fuzhou, Fujian 350002, China and Institute of Advanced Energy Materials, Fuzhou University, Fuzhou, Fujian 350002, China. fimer@126.com wei-mingdeng@fzu.edu.cn.
authors.forename: Mingdeng
authors.initials: M
authors.lastname: Wei