Journal
CHEMICAL COMMUNICATIONS
Volume 51, Issue 22, Pages 4693-4696Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c4cc09760b
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Funding
- Northeastern Center for Chemical Energy Storage, an Energy Frontier Research Center - U.S. Department of Energy, Office of Basic Energy Sciences [DE-SC0012583]
- China Scholarship Council [2011631005]
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A new O3-Na0.78Li0.18Ni0.25Mn0.583Ow 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). Ni2+/Ni4+ is suggested to be the main redox center. Further optimization could be realized by tuning the combination and the ratio of transition metals.
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