Morphology and electrochemical performance of Li[Li0.2Mn0.56Ni0.16Co0.08]O2 cathode materials prepared with different metal sources

被引：19
作者：
Shi, S. J.
Tu, J. P. [1 ]
Zhang, Y. D.
Zhang, Y. J.
Gu, C. D.
Wang, X. L.
机构：
[1] Zhejiang Univ, State Key Lab Silicon Mat, Key Lab Adv Mat & Applicat Batteries Zhejiang Pro, Hangzhou 310027, Zhejiang, Peoples R China
来源：
ELECTROCHIMICA ACTA | 2013年 / 109卷
关键词：
Lithium nickel cobalt manganese oxide; Metal source; Porosity; sol-gel; LITHIUM-ION BATTERIES; HIGH-CAPACITY; SURFACE MODIFICATION; COMPOSITE CATHODES; CYCLING STABILITY; RATE CAPABILITY; CO ELECTRODES; LI; MN; NI;
D O I：
10.1016/j.electacta.2013.08.002
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
Li[Li0.2Mn0.56Ni0.16Co0.08]O-2 cathode materials with well-formed layered structure are synthesized by sol-gel process with different metal sources. Two normal metal salts (acetate and nitrate) are performed as the metal sources, and the effect of particle morphology on the electrochemical performance of the Li-rich layered oxide is investigated to show the importance of the choice of metal sources. Porosity with high specific surface area of 10.09 m(2) g(-1) is only observed for the oxide powder synthesized with nitrate. Simultaneously, high discharge capacity of 247.8 mAh g(-1) and 135.5 mAh g(-1) are obtained at current densities of 200 mA g(-1) and 2000 mA g(-1), respectively. In addition, the results of electrochemical impedance spectroscopy (EIS) indicate that such porous morphology with good particle contact can efficiently reduce the impedance of the oxide electrode. (C) 2013 Elsevier Ltd. All rights reserved.
引用
收藏
页码：828 / 834
页数：7
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