A phase-inversion process to prepare porous LiAl_0.1Mn_1.9O₄ spinel for aqueous rechargeable lithium batteries

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• 作者：Zhaohui Li ; Jie Yang ; Jingliang Wang ; Jiaojun Tang ; Gangtie Lei ; Qizhen Xiao
• 关键词：Lithium manganese oxide ; Phase inversion ; Porous ; Aqueous rechargeable lithium batteries
• 刊名：Microporous and Mesoporous Materials
• 出版年：2012
• 出版时间：1 November, 2012
• 年：2012
• 卷：162
• 期：Complete
• 页码：44-50
• 全文大小：1021 K

文摘

A porous LiAl_0.1Mn_1.9O₄ (P-LAMO) spinel was prepared by a phase-inversion process followed by calcined at 700 ¡ãC for 6 h in the air atmosphere. Its crystal structure was determined from X-ray diffraction (XRD) pattern, and the morphology was observed using the scanning electron microscope (SEM) and transmission electron microscope (TEM). In the 1.0 mol l^?1 Li₂SO₄ aqueous electrolyte, it can deliver the capacities of 117, 113, 104 and 88 mAh g^?1 at the rates of 1, 5, 10 and 20 C at room temperature, respectively. Even charged at 60 C, it is still able to deliver a capacity of 113 mAh g^?1 at 1 C with a coulomb efficiency of 98 % . The results suggest that the product could be a promising cathode material for aqueous rechargeable lithium batteries.