Journal
PARTICLE & PARTICLE SYSTEMS CHARACTERIZATION
Volume 33, Issue 8, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/ppsc.201500129
Keywords
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Funding
- NSFC [51222210, 11234013, 51421002]
- 973 Projects [2012CB932900]
- One Hundred Talent Project of the Chinese Academy of Science
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Recently, increasing attention has been paid to the newly emerging area of sodium-ion batteries, as a promising supplement for lithium-ion batteries. Although many cathode materials have been proposed, most of these have limitations for practical applications, such as a low capacity or a poor cycling performance. Here, sodium-deficient O3-Na-0.9[Ni0.4MnxTi0.6-x]O-2 (where x = 0.1-0.6, abbreviated as NNMT-9415, 9424, 9433, 9442, 9451, and 9460, respectively) materials are introduced, which can be used as the cathode in sodium-ion batteries. Among these materials, the electrochemical behavior of materials with x = 0.4 and 0.3 is the highest with a higher capacity and better cycling property than the other materials. These can deliver an initial capacity of about 120 mA h g(-1) in a voltage range of 2.5-4.2 V with a negligible capacity loss even after 100 cycles. The rate capabilities of 82% and 64% at 1 C and 2 C current rates, respectively, are also satisfactory. The good cycling performance and high capacity make these two materials potential candidates as the cathode material for sodium-ion batteries.
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