Journal
POWDER TECHNOLOGY
Volume 207, Issue 1-3, Pages 396-400Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.powtec.2010.11.025
Keywords
Cathode materials; Eutectic molten salt; Doping; LiNi1/3Co1/3Al1/3O2
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Funding
- Natural Science Foundation of China [21071046]
- Henan Provincial Department of Science and Technology [080102270013]
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A lithium-ion battery cathode material, LiNi1/3Co1/3Al1/3O2, with excellent electrochemical properties was prepared by three-phase temperature sintering, using eutectic lithium salts (0.38LiOH center dot H2O-0.62LiNO(3)) mixed with the precursor Ni1/3Co1/3Al1/3(OH)(2). This method was simple and inexpensive, and the materials could be mixed uniformly at the eutectic melting point without any grinding. A well-layered alpha-NaFeO2 structure was confirmed by X-ray diffraction (XRD). The ratio of characteristic diffraction peaks I(003)/I (104) reached 1.73. Charge-discharge testing of the synthesized powder showed an initial charge-discharge capacity of 151.5 mAh.g(-1) at a specific current of 0.2 C in the range 2.8-4.3 V up to 20 cycles with no noticeable capacity-fading (94.5% of the first discharge capacity), and reversible capacities of 133.7 and 120.9 mAh.g(-1) for specific currents of 1 C and 2 C at room temperature. The discharge capacity and capacity retention at 55 degrees C were substantially better than at room temperature. (C) 2010 Published by Elsevier B.V.
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