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Proceedings of the 7th National Conference on Functional Materials and Applications (FMA 2010 E-BOOK)

Changsha,China,10.16-10.18,2010

ISBN: 978-1-935068-41-9 Scientific Research Publishing, USA

E-Book 2313pp Pub. Date: October 2010

Category: Chemistry & Materials Science

Price: $360

Title: Preparation and Electrochemical Performances of Ti Doped LiNi0.6Co0.2Mn0.2O2
Source: Proceedings of the 7th National Conference on Functional Materials and Applications (FMA 2010 E-BOOK) (pp 1843-1846)
Author(s): Yue-bin Xu, College of Chemistry and Bioengineering, Guilin University of Technology, Guilin, China
Sheng-kui Zhong, Department of Biological and Chemical Engineering; Guangxi University of Technology; Liuzhou, China
Qian Zhang, College of Chemistry and Bioengineering, Guilin University of Technology, Guilin, China
Abstract: The layered Li(Ni0.6Co0.2Mn0.2)1-xTixO2 cathode materials were prepared by a co-precipitation method. The properties of the Ti-doped LiNi0.6Co0.2Mn0.2O2 were investigated by X-ray diffraction (XRD), scanning electron microscopic (SEM), and electrochemical measurements. XRD studies showed that the Ti -doped LiNi0.6Co0.2Mn0.2O2 has the same layered structure as the undoped LiNi0.6Co0.2Mn0.2O2. The SEM images exhibited that the particle size of of the Ti-doped LiNi0.6Co0.2Mn0.2O2 is smaller than that of the undoped LiNi0.6Co0.2Mn0.2O2. The Ti-doped LiNi0.6Co0.2Mn0.2O2 samples were investigated on the Li extraction/insertion performances through charge/discharge, and electrochemical impedance spectra (EIS). The optimal doping content of Ti was that x=0.06 in the Li(Ni0.6Co0.2Mn0.2)1-xTixO2 samples to achieve high discharge capacity and good cyclic stability. The electrode reaction reversibility and the charge transfer resistance was decreased through Ti-doping.
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