Structure and electrochemical performance of LiNiyCo0.1-yMn1.9O4 cathode materials prepared by a precipitation method

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	Structure and electrochemical performance of LiNiyCo0.1-yMn1.9O4 cathode materials prepared by a precipitation method
	G. G. Wang; J. M. Wang; W. Q. Mao; L. Q. Liu; J. Q. Zhang; C. N. Cao
	2005
发表期刊	Acta Physico-Chimica Sinica
ISSN	1000-6818
卷号	21 期号:11 页码:1285-1290
摘要	Spinel LiMn2O4 and LiNiyCo0.1-yMn1.9O4 (y=0, 0.05, 0.10) samples were prepared by a precipitation method. The structure, morphology, and electrochemical performance of the samples were characterized by Fourier transform infrared(FT-IR) spectroscopy, X-ray diffraction (XRD), scanning electron micrographs (SEM), charge-discharge measurements, and electrochemical impedance spectra (EIS). The results of FT-IR and XRD indicated that the absorption band at about 519 cm(-1) shifts to the high frequency with the decrease of Ni content in LiNiyC0.1-yMn1.9O4 samples and the lattice parameter(a) of LiMn2O4 samples decreases with the addition of Ni, Co, or Ni/Co. The SEM observation dispplayed that the LiNiyCo0.1-yMn1.9O4 samples have lower agglomeration degree and smaller particle size. The results of the electrochemical experiments showed that the improvements on the electrochemical performance of substituted samples have some different reasons, and the LiNi0.05Co0.05Mn1.9O4 sample manifests better electrochemical performance in 4 V region due to its lower electrochemical polarization and larger diffusion coefficient of Li+ ions.
部门归属	zhejiang univ, dept chem, hangzhou 310027, peoples r china. chinese acad sci, met res inst, state key lab corros & protect, shenyang 110016, peoples r china.;wang, jm (reprint author), zhejiang univ, dept chem, hangzhou 310027, peoples r china;wjm@cmsce.zju.edu.cn
关键词	Lithium Ion Batteries Substituted Manganese Spinel Oxide Precipitation Electrochemical Properties Rechargeable Lithium Batteries Li-ion Batteries Spinel Phases Doped Limn2o4 Intercalation Electrodes Impedance Graphite Diffusion Cr
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WOS记录号	WOS:000233313800018
引用统计	被引频次：4[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/35066
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	G. G. Wang,J. M. Wang,W. Q. Mao,et al. Structure and electrochemical performance of LiNiyCo0.1-yMn1.9O4 cathode materials prepared by a precipitation method[J]. Acta Physico-Chimica Sinica,2005,21(11):1285-1290.
APA	G. G. Wang,J. M. Wang,W. Q. Mao,L. Q. Liu,J. Q. Zhang,&C. N. Cao.(2005).Structure and electrochemical performance of LiNiyCo0.1-yMn1.9O4 cathode materials prepared by a precipitation method.Acta Physico-Chimica Sinica,21(11),1285-1290.
MLA	G. G. Wang,et al."Structure and electrochemical performance of LiNiyCo0.1-yMn1.9O4 cathode materials prepared by a precipitation method".Acta Physico-Chimica Sinica 21.11(2005):1285-1290.