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Vol. 26 No. 22 (2014): Vol 26 Issue 22

Copyright (c) 2014 AJC

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Effect of Al-Doping on Electrochemical Performance of LiMn2O4

https://doi.org/10.14233/ajchem.2014.17652
Xinghua Liang
Guangxi Science and Technology University, Liuzhou 545006, P.R. China
Shuaibo Zeng
Guangxi Science and Technology University, Liuzhou 545006, P.R. China
Yusi Liu
Guangxi Science and Technology University, Liuzhou 545006, P.R. China
Tianjiao Liu
Guangxi Science and Technology University, Liuzhou 545006, P.R. China
Lin Shi
Guangxi Science and Technology University, Liuzhou 545006, P.R. China
Chaochao Ye
Guangxi Science and Technology University, Liuzhou 545006, P.R. China

Corresponding Author(s) : Xinghua Liang

lxh304@aliyun.com.cn

Asian Journal of Chemistry, Vol. 26 No. 22 (2014): Vol 26 Issue 22

Abstract

Spinel LiMn2O4 and LiAlXMn2-XO4(GX, X = 0, 1, 2, 3, 4) have been synthesized by solid-state method. The synthesized samples were characterized by following methods: X-ray diffraction, scanning electron microscopy. Results showed that LiAl0.3Mn1.7O4(G3) was spinel structure which space group was Fd3m. The spinous substances were not observed on its spherical-structured surface. Experimental battery EX(X = 0, 0.1, 0.2, 0.3, 0.4) was assembled by using GX as cathode electrode, active carbon as conductive agent and Li plate as the anode electrode. The EX(X = 0, 0.1, 0.2, 0.3, 0.4) was characterized by electrochemical impedance spectroscopy, cyclic voltammetry and charge-discharge studies. Results indicated that Al-substitution decreased the internal resistance of EX. Charge-discharge cycling studies and cyclic voltammetry test showed that Al-substitution substantially improved the capacity retention of the EX.

Keywords

Lithium ion battery XRD SEM Electrochemical performance
Liang, X., Zeng, S., Liu, Y., Liu, T., Shi, L., & Ye, C. (2014). Effect of Al-Doping on Electrochemical Performance of LiMn2O4. Asian Journal of Chemistry, 26(22), 7721–7724. https://doi.org/10.14233/ajchem.2014.17652
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