Al-Doped Lithium Manganese Oxide: Preparation and Stability in Acid Medium

作者：Ma Li-Wen^*; Chen Bai-Zhen; Shi Xi-Chang; Xu Hui; Yang Xi-Yun; Zhang Kun

来源：Chinese Journal of Inorganic Chemistry, 2010, 26(3): 413-418.

• lithium manganese oxide
• Al dopin
• structure
• stability

A series of Al-doped spinel oxides LiAlxMn2-xO4(x=0, 0.3, 0.5, 0.7, 1.0) were synthesized by precipitation method. Their structure, composition and morphology were characterized by X-ray diffraction (XRD), energy dispersive spectroscopy(EDS) and scanning electron microscopy(SEM). The stability of these Al-doped spinel oxides prepared at different temperatures was investigated in acid medium as well. The results show that Al can be brought into the spinel framework completely to form well-crystallized product according to theoretical stoichiometry when x is 0.5 and synthesis temperature is 850 degrees C. To a great extent LiAl0.5Mn1.5O4 can restrain the dissolution of Mn with a relatively low Al extraction ratio and a considerable Li extraction ratio. LiAl0.5Mn1.5O4 after acid treatment still has the spinel structure and its morphology keeps integrity.

• 出版日期2010-3
• 单位中南大学