title: High power rechargeable magnesium/iodine battery chemistry.
abstract: Rechargeable magnesium batteries have attracted considerable attention because of their potential high energy density and low cost. However, their development has been severely hindered because of the lack of appropriate cathode materials. Here we report a rechargeable magnesium/iodine battery, in which the soluble iodine reacts with Mg2+to form a soluble intermediate and then an insoluble final product magnesium iodide. The liquid-solid two-phase reaction pathway circumvents solid-state Mg2+diffusion and ensures a large interfacial reaction area, leading to fast reaction kinetics and high reaction reversibility. As a result, the rechargeable magnesium/iodine battery shows a better rate capability (180 mAh g-1at 0.5 C and 140 mAh g-1at 1 C) and a higher energy density (∼400 Wh kg-1) than all other reported rechargeable magnesium batteries using intercalation cathodes. This study demonstrates that the liquid-solid two-phase reaction mechanism is promising in addressing the kinetic limitation of rechargeable magnesium batteries.
authors.affiliation: Department of Chemical and Biomolecular Engineering, University of Maryland, College Park, College Park, Maryland 20740, USA.|Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China.
authors.forename: Huajun
authors.initials: H
authors.lastname: Tian
authors.affiliation: Department of Chemical and Biomolecular Engineering, University of Maryland, College Park, College Park, Maryland 20740, USA.
authors.forename: Tao
authors.initials: T
authors.lastname: Gao
authors.affiliation: Department of Chemical and Biomolecular Engineering, University of Maryland, College Park, College Park, Maryland 20740, USA.
authors.forename: Xiaogang
authors.initials: X
authors.lastname: Li
authors.affiliation: Department of Chemical and Biomolecular Engineering, University of Maryland, College Park, College Park, Maryland 20740, USA.
authors.forename: Xiwen
authors.initials: X
authors.lastname: Wang
authors.affiliation: Department of Chemical and Biomolecular Engineering, University of Maryland, College Park, College Park, Maryland 20740, USA.
authors.forename: Chao
authors.initials: C
authors.lastname: Luo
authors.affiliation: Department of Chemical and Biomolecular Engineering, University of Maryland, College Park, College Park, Maryland 20740, USA.
authors.forename: Xiulin
authors.initials: X
authors.lastname: Fan
authors.affiliation: Department of Chemical and Biomolecular Engineering, University of Maryland, College Park, College Park, Maryland 20740, USA.
authors.forename: Chongyin
authors.initials: C
authors.lastname: Yang
authors.affiliation: Department of Chemical and Biomolecular Engineering, University of Maryland, College Park, College Park, Maryland 20740, USA.
authors.forename: Liumin
authors.initials: L
authors.lastname: Suo
authors.affiliation: Department of Chemical and Biomolecular Engineering, University of Maryland, College Park, College Park, Maryland 20740, USA.
authors.forename: Zhaohui
authors.initials: Z
authors.lastname: Ma
authors.affiliation: Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China.|School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China.
authors.forename: Weiqiang
authors.initials: W
authors.lastname: Han
authors.affiliation: Department of Chemical and Biomolecular Engineering, University of Maryland, College Park, College Park, Maryland 20740, USA.
authors.forename: Chunsheng
authors.initials: C
authors.lastname: Wang