title: Vanadium oxychloride/magnesium electrode systems for chloride ion batteries.
abstract: We report a new type of rechargeable chloride ion battery using vanadium oxychloride (VOCl) as cathode and magnesium or magnesium/magnesium chloride (MgCl2/Mg) as anode, with an emphasis on the VOCl-MgCl2/Mg full battery. The charge and discharge mechanism of the VOCl cathode has been investigated by X-ray diffraction, X-ray photoelectron spectroscopy, and electrochemical measurements, demonstrating the chloride ion transfer during cycling. The VOCl cathode can deliver a reversible capacity of 101 mAh g(-1) at a current density of 10 mA g(-1) and a capacity of 60 mAh g(-1) was retained after 53 cycles in this first study.
authors.affiliation: Helmholtz-Institute Ulm for Electrochemical Energy Storage (HIU) , Helmholtzstrasse 11, 89081 Ulm, Germany.
authors.forename: Ping
authors.initials: P
authors.lastname: Gao
authors.forename: Xiangyu
authors.initials: X
authors.lastname: Zhao
authors.forename: Zhirong
authors.initials: Z
authors.lastname: Zhao-Karger
authors.forename: Thomas
authors.initials: T
authors.lastname: Diemant
authors.forename: R Jürgen
authors.initials: RJ
authors.lastname: Behm
authors.forename: Maximilian
authors.initials: M
authors.lastname: Fichtner
keywords: chloride ion; electrochemistry; magnesium anode; rechargeable battery; vanadium oxychloride