期刊
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
卷 16, 期 3, 页码 1229-1237出版社
SPRINGER
DOI: 10.1007/s10008-011-1513-6
关键词
Lithium ion batteries; Li[Ni1/3Co1/3Mn1/3]O-2; Li source; Carbonate co-precipitation; Tap density; Cycling performance
资金
- National Natural Science Foundation of China [20871101]
- Joint Fund of Natural Science of Hunan Province
- Xiangtan City [09BG005]
- Industrial Project of Colleges and Universities of Hunan Province [10CY005]
- Project of Condition Research of Hunan Province [2010TC2004]
- Colleges and Universities in Hunan Province plans to graduate research and innovation [CX2009B133]
Spherical Li[Ni1/3Co1/3Mn1/3]O-2 cathode materials with different microstructure have been prepared by a continuous carbonate co-precipitation method using LiOHa <...H2O, Li2CO3, CH(3)COOLia <...2H(2)O and LiNO3 as lithium source. The effects of Li source on the physical and electrochemical properties of Li[Ni1/3Co1/3Mn1/3]O-2 are investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM) and electrochemical measurements. The results show that the morphology, tap density and high rate cycling performance of Li[Ni1/3Co1/3Mn1/3]O-2 spherical particles are strongly affected by Li source. Among the four Li sources used in this study, LiOHa <...H2O is beneficial to enhance the tap density of Li[Ni1/3Co1/3Mn1/3]O-2, and the tap density of as-prepared sample reaches 2.32 g cm(-3). Meanwhile, Li2CO3 is preferable when preparing the Li[Ni1/3Co1/3Mn1/3]O-2 with high rate cycling performance, upon extended cycling at 1 and 5C rates, 97.5% and 92% of the initial discharge capacity can be maintained after 100 cycles.
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