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Advances in Materials Science and Engineering
Volume 2013, Article ID 137032, 7 pages
http://dx.doi.org/10.1155/2013/137032
Research Article

Structural and Electrochemical Investigation of Li1.02Mn1.92Al0.02Fe0.02Cr0.02 ( ) Synthesized by Solid-State Method

School of Chemical and Material Engineering, Jiangnan University, Wuxi City, Jiangsu 214122, China

Received 31 May 2013; Accepted 4 October 2013

Academic Editor: Markku Leskela

Copyright © 2013 Hai-Lang Zhang and Nanchun Xiang. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

To improve the cycle performance of spinel LiMn2O4 as the cathode of 4-V-class lithium secondary batteries, spinel phases Li1.02Mn1.92Al0.02Fe0.02Cr0.02 ( , 0.08) have been successfully prepared by a conventional solid-state method. The structure and physicochemical properties of this as-prepared powder were investigated by powder X-ray diffraction (XRD), electrochemical impedance spectroscopy (EIS), and galvanostatic charge-discharge test in detail. The results reveal that the multiple doping spinel Li1.02Mn1.92Al0.02Fe0.02Cr0.02O4F0.08 have better electrochemical performance than the undoped or only metal-element doped material, which may be contributed to the multiple cation and anion doping to lead to a more stable spinel framework with good capacity retention rate.