title: A new O3-type layered oxide cathode with high energy/power density for rechargeable Na batteries.
abstract: A new O3-Na(0.78)Li(0.18)Ni(0.25)Mn(0.583)O(w) is prepared as the cathode material for Na-ion batteries, delivering exceptionally high energy density and superior rate performance. The single-slope voltage profile and ex situ synchrotron X-ray diffraction data demonstrate that no phase transformation happens through a wide range of sodium concentrations (up to 0.8 Na removed). Ni(2+)/Ni(4+) is suggested to be the main redox center. Further optimization could be realized by tuning the combination and the ratio of transition metals.
authors.affiliation: Department of NanoEngineering, University of California San Diego, 9500 Gilman Drive, La Jolla, CA 92093, USA. shirleymeng@ucsd.edu.
authors.forename: Haodong
authors.initials: H
authors.lastname: Liu
authors.forename: Jing
authors.initials: J
authors.lastname: Xu
authors.forename: Chuze
authors.initials: C
authors.lastname: Ma
authors.forename: Ying Shirley
authors.initials: YS
authors.lastname: Meng