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| Synthesis and Electrochemical Characteristics of Layered LiNi0.7Co0.15Mn0.15O2 Cathode Materials for Li-ion Batteries |
| TAN Xinxin 1;2; TANG Yougen1; WANG Weidong2; WANG Haitao 2; DING Qianqian2 |
1.College of Chemical & Chemical Engineering; Central South University; Changsha 410083
2.Shenzhen Tianjiao Technology Co.; Ltd. Shenzhen 518119 |
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Cite this article:
TAN Xinxin TANG Yougen WANG Weidong WANG Haitao DING Qianqian . Synthesis and Electrochemical Characteristics of Layered LiNi0.7Co0.15Mn0.15O2 Cathode Materials for Li-ion Batteries. Chin J Mater Res, 2010, 24(2): 159-164.
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Abstract Spherical LiNi 0.7 Co 0.15 Mn 0.15 O 2 powder was synthesized by firing LiOH·H2O and the spherical Ni 0.7 Co 0.15 Mn 0.15 (OH)2 prepared by co-precipitation method. The obtained powder was characterized by X-ray diffraction (XRD), Scanning electronic microscope (SEM), Thermogravimetric/Differential scanning calorimeter (TG/DSC) and constant current charge-discharge cycling. The results show that the optimal preparation condition of the layered LiNi 0.7 Co 0.15 Mn 0.15 O2 was 750 under oxygen flowing. The XRD pattern of the sample prepared under the above condition can be identified by a typical structure of hexagonal α-NaFeO2 type. The SEM micrograph of LiNi 0.7 Co 0.15 Mn 0.15 O2 shows that the particle size is about 10 μm with narrow grain size. Electrochemical measurements show that it delivered an initial discharge capacity of 185.2 mA·h/g with the voltage range 3–4.3V at the 0.2C rate and initial capacity retention of 98.32% after 30 cycles.
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Received: 22 December 2009
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