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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 16    No. 2    April 2006

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Synthesis and characterization of multidoped lithium manganese oxide spinel LiCo0.02La0.01Mn1.97O3.98Cl0.02
ZHANG Na(张 娜), TANG Zhi-yuan(唐致远), HUANG Qing-hua(黄庆华), LU Xing-he(卢星河)

School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China

Abstract:Multidoped spinel LiCo0.02La0.01Mn1.97O3.98Cl0.02 was synthesized by solid-state method. The structure and electrochemical performance were characterized by XRD, ESEM, particle size distribution analysis, specific surface area testing, galvanostatic cycling and electrochemical impedance spectroscopy. The XRD analysis shows that the sample exhibits pure spinel phase. The substitution of Co, La for Mn and Cl for O in the LiMn2O4 stabilizes the structural integrity of the spinel host, which in turn increases the electrochemical cycleability. The electrochemical experiments confirm that the capacity of the LiCo0.02La0.01Mn1.97O3.98Cl0.02 electrode maintains 90.6% of the initial capacity at 180th cycle.

 

Key words: lithium ion batteries; LiMn2O4; lithium manganese oxide spinel; multidoped; electrochemical properties

ISSN 1672-7029
CN 43-1423/U

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