标题：The effect of aluminum precursors on the structural and electrochemical properties of spinel LiMn2-xAlxO4(x=0, 0.05, 0.1, 0.15) cathode materials
作者：Feng, Xiaoyu ;Tian, Yun ;Zhang, Jianxin ;Yin, Longwei
作者机构：[Feng, Xiaoyu ;Tian, Yun ;Zhang, Jianxin ;Yin, Longwei ] Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, Ministry of 更多
摘要：In this paper, the effect of different aluminum precursors, i.e., Al(OH)3and Al2O3, on the structural and electrochemical properties of spinel LiMn2-xAlxO4(x=0, 0.05, 0.1, 0.15) is investigated by X-ray diffraction (XRD), micro-Raman spectroscopy (RS), field-emission scanning electron microscopy (FE-SEM) and charge-discharge cycling test. In particular, the ratio of Raman intensity at 625cm-1to Raman intensity at 585cm-1provides crucial insights into the Al substitution in spinel LiMn2O4lattice. The XRD patterns and FE-SEM images show that the crystal structure and the particle morphologies of LiMn2-xAlxO4are not altered by use of either Al(OH)3or Al2O3as Al precursors. However, the Raman spectra show that Al doping behavior is significantly affected by Al precursors, with Al(OH)3serving as a more effective Al precursor than Al2O3. Such conclusion is further supported by the electrochemical cycling results. © 2013 Elsevier B.V.