title: Highly reversible Mg insertion in nanostructured Bi for Mg ion batteries.
abstract: Rechargeable magnesium batteries have attracted wide attention for energy storage. Currently, most studies focus on Mg metal as the anode, but this approach is still limited by the properties of the electrolyte and poor control of the Mg plating/stripping processes. This paper reports the synthesis and application of Bi nanotubes as a high-performance anode material for rechargeable Mg ion batteries. The nanostructured Bi anode delivers a high reversible specific capacity (350 mAh/gBi or 3430 mAh/cm(3)Bi), excellent stability, and high Coulombic efficiency (95% initial and very close to 100% afterward). The good performance is attributed to the unique properties of in situ formed, interconnected nanoporous bismuth. Such nanostructures can effectively accommodate the large volume change without losing electric contact and significantly reduce diffusion length for Mg(2+). Significantly, the nanostructured Bi anode can be used with conventional electrolytes which will open new opportunities to study Mg ion battery chemistry and further improve its properties.
authors.affiliation: Pacific Northwest National Laboratory , Richland, Washington 99352, United States.
authors.forename: Yuyan
authors.initials: Y
authors.lastname: Shao
authors.forename: Meng
authors.initials: M
authors.lastname: Gu
authors.forename: Xiaolin
authors.initials: X
authors.lastname: Li
authors.forename: Zimin
authors.initials: Z
authors.lastname: Nie
authors.forename: Pengjian
authors.initials: P
authors.lastname: Zuo
authors.forename: Guosheng
authors.initials: G
authors.lastname: Li
authors.forename: Tianbiao
authors.initials: T
authors.lastname: Liu
authors.forename: Jie
authors.initials: J
authors.lastname: Xiao
authors.forename: Yingwen
authors.initials: Y
authors.lastname: Cheng
authors.forename: Chongmin
authors.initials: C
authors.lastname: Wang
authors.forename: Ji-Guang
authors.initials: JG
authors.lastname: Zhang
authors.forename: Jun
authors.initials: J
authors.lastname: Liu