Facile solvothermal synthesis of mesoporous manganese ferrite (MnFe2O4) microspheres as anode materials for lithium-ion batteries.
Facile solvothermal synthesis of mesoporous manganese ferrite (MnFe2O4) microspheres as anode materials for lithium-ion batteries.
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DOI：
10.1016/j.jcis.2013.01.067
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发表时间：
2013-05
影响因子：
9.9
通讯作者：
Zailei Zhang;Yanhong Wang;Qiangqiang Tan;Z. Zhong;F. Su
中科院分区：
文献类型：
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作者：
Zailei Zhang;Yanhong Wang;Qiangqiang Tan;Z. Zhong;F. Su
报道了介孔锰铁氧体（MnFe 2 O 4）微球作为锂离子电池负极材料的合成与表征。以Mn（CH 3COO）2和FeCl 3为前驱体，在CH 3COOK、CH 3COOC 2 H5和HOCH 2CH 2 OH存在下，采用溶剂热法合成了MnFe 2 O 4微球。采用X射线衍射、透射电子显微镜、扫描电子显微镜、氮气吸附、热重分析、X射线光电子能谱、程序升温还原和程序升温氧化等手段对样品进行了表征。合成的介孔MnFe 2 O 4微球由纳米颗粒（10- 30 nm）组成，直径为100- 500 nm，比表面积为60.2 - 86.8 m2 g-1，取决于制备中加入的CH 3COOK的量。MnFe 2 O 4经600°C煅烧后分解为Mn 2 O3和Fe 2 O3的混合物。400°C焙烧的介孔MnFe 2 O 4微球在0.2C和0.8C下循环50次后的容量分别为712.2mAhg− 1和552.2mAhg− 1，平均容量衰减率分别为0.28%和0.48%，明显优于未经焙烧和600°C焙烧的样品。该研究对锂离子电池二元金属氧化物负极材料的制备具有一定的指导意义。
We report the synthesis and characterization of the mesoporous manganese ferrite (MnFe2O4) microspheres as anode materials for Li-ion batteries. MnFe2O4microspheres were synthesized by a facile solvothermal method using Mn(CH3COO)2and FeCl3as metal precursors in the presence of CH3COOK, CH3COOC2H5, and HOCH2CH2OH. The samples were characterized by X-ray diffraction, transmission electron microscopy, scanning electron microscopy, nitrogen adsorption, thermal gravimetric, X-ray photoelectron spectroscopy, temperature programmed reduction, and temperature programmed oxidation. The synthesized mesoporous MnFe2O4microspheres composed of nanoparticles (10–30nm) were 100–500nm in diameter and had surface areas between 60.2 and 86.8m2g−1, depending on the CH3COOK amounts added in the preparation. After calcined at 600°C, MnFe2O4was decomposed to Mn2O3and Fe2O3mixture. The mesoporous MnFe2O4microspheres calcined at 400°C showed a capacity of 712.2mAhg−1at 0.2C and 552.2mAhg−1at 0.8C after 50cycles, and an average capacity fading rate of around 0.28%/cycle and 0.48%/cycle, much better than those of the samples without calcination and calcined at 600°C. The work would be helpful in the fabrication of binary metal oxide anode materials for Li-ion batteries.