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Title: O3-type Na(Mn₀.₂₅Fe₀.₂₅Co₀.₂₅Ni₀.₂₅)O₂: a quaternary layered cathode compound for rechargeable Na ion batteries

We report a new layered Na(Mn₀.₂₅Fe₀.₂₅Co₀.₂₅Ni₀.₂₅)O₂ compound with O3 oxygen stacking. It delivers 180 mAh/g initial discharge capacity and 578 Wh/kg specific energy density with good cycling capability at high cutoff voltage. In situ X-ray diffraction (XRD) shows a reversible structure evolution of O3-P3-O3'-O3'' upon Na de-intercalation. The excellent capacity and cycling performance at high cutoff voltage make it an important model system for studying the general issue of capacity fading in layered Na cathode compounds.
Authors:
 [1] ;  [2] ;  [3] ;  [1] ;  [1] ;  [2]
  1. Massachusetts Institute of Technology, Cambridge, MA (United States). Dept. of Materials Science and Engineering
  2. Brookhaven National Laboratory (BNL), Upton, NY (United States)
  3. Massachusetts Institute of Technology, Cambridge, MA (United States). Dept. of Mechanical Engineering
Publication Date:
OSTI Identifier:
1198372
Report Number(s):
BNL-107066-2014-JA
Journal ID: ISSN 1388-2481; VT1201000-05450-1005554
Grant/Contract Number:
AC02-98CH10886
Type:
Published Article
Journal Name:
Electrochemistry Communications
Additional Journal Information:
Journal Volume: 49; Journal ID: ISSN 1388-2481
Publisher:
Elsevier
Research Org:
Brookhaven National Lab. (BNL), Upton, NY (United States). National Synchrotron Light Source
Sponsoring Org:
USDOE Office of Energy Efficiency and Renewable Energy (EERE)
Country of Publication:
United States
Language:
English
Subject:
25 ENERGY STORAGE; Sodium battery; Na(Mn0.25Fe0.25Co0.25Ni0.25)O2; CATHODES; NSLS