| Mn_3O_4制备微米级单晶LiMn_2O_4颗粒及其电性能研究 |
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| 引用本文： | 许鑫鸿,郭东磊,魏秀格,张 蕾,常照荣. Mn_3O_4制备微米级单晶LiMn_2O_4颗粒及其电性能研究[J]. 河南师范大学学报(自然科学版), 2014, 0(1): 72-76 |
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| 作者姓名： | 许鑫鸿 郭东磊 魏秀格 张 蕾 常照荣 |
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| 作者单位： | ;1.河南师范大学化学化工学院 |
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| 摘 要： | 通过化学沉淀和陈化制备了粒径均匀和结晶度高的四氧化三锰,以其作为合成锰酸锂的前驱体,再经高温固相合成了一种微米级单晶锰酸锂颗粒,并用X-射线衍射和扫描电镜对其进行了表征.结果表明:所合成的样品为纯相尖晶石LiMn2O4,一次颗粒大小均匀,平均粒径在2μm左右,为晶格发育完整的八面体尖晶石单晶.电性能测试的数据表明,所得到的尖晶石型锰酸锂与工业电解二氧化锰合成的锰酸锂相比,较大程度的改善了电池材料的比容量、倍率性能和循环性能.
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| 关 键 词： | 四氧化三锰 锂离子电池 正极材料 锰酸锂 倍率性能 |
Synthesis and Electrochemical Properties of LiMn_2O_4 from Mangano-Manganese Oxide |
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| Affiliation: | ,College of Chemistry and Chemical Engineering,Henan Normal University |
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| Abstract: | Mangano-Manganese oxide is synthesized by chemical-precipitating and aging,which is used as the precursor of micron grade and single crystal of LiMn2O4via solid-state reaction.The samples are characterized by XRD,SEM.The results indicate that the size of the prepared LiMn2O4particles is uniform,whose diameter is about 2μm in average and the particles are all made of well-distributed octahedron-like spinel single crystals.The electrochemical test results reveal that the prepared LiMn2O4possess much better specific capacity,rate capability and cycle stability with respect to LiMn2O4synthesized by EMD. |
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| Keywords: | Mangano-Manganese oxide Lithium ion battery cathode material rate capacity |
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