Journal
IONICS
Volume 21, Issue 4, Pages 1011-1016Publisher
SPRINGER HEIDELBERG
DOI: 10.1007/s11581-014-1249-2
Keywords
Sodium-ion batteries; P2-Na2/3Ni1/3Mn2/3O2; Cathode material; Electrochemical properties
Funding
- Natural Science Foundation of LiaoNing Province, China [2014010044-301]
- Natural Science Foundation of China [51172242]
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The pure phase P2-Na2/3Ni1/3Mn2/3O2 was synthesized by a solid reaction process. The optimum calcination temperature was 850 A degrees C. The as-prepared product delivered a capacity of 158 mAh g(-1) in the voltage range of 2-4.5 V, and there was a phase transition from P2 to O2 at about 4.2 V in the charge process. The P2 phase exhibited excellent intercalation behavior of Na ions. The reversible capacity is about 88.5 mAh g(-1) at 0.1 C in the voltage range of 2-4 V at room temperature. At an elevated temperature of 55 A degrees C, it could remain as an excellent capacity retention at low current rates. The P2-Na2/3Ni1/3Mn2/3O2 is a potential cathode material for sodium-ion batteries.
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