| 高温固相法制备LiMnO2及其掺杂改性 |
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| 引用本文： | 陈猛,蔡智,敖文乐,刘瑶.高温固相法制备LiMnO2及其掺杂改性[J].电池工业,2009,14(4):227-230. |
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| 作者姓名： | 陈猛 蔡智 敖文乐 刘瑶 |
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| 作者单位： | 哈尔滨工程大学材料科学与化学工程学院,黑龙江哈尔滨,150001 |
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| 摘 要： | 采用高温固相法合成了正交LiMnO2及其掺杂改性的LiMnO2 and Li1.08MnO1.92F0.08和Li1.08Al0.0625Mn0.9375O1.92F0.08正极材料。通过X射线衍射对材料的晶体结构进行了分析，通过扫描电镜对材料的表面形态进行了分析，通过恒电流充放电和电化学阻抗测试技术对材料的电化学性能进行了测试。实验结果表明，LiMnO2 and Li1.08MnO1.92F0.08、Li1.08Al0.0625Mn0.9375O1.92F0.08的结构比未掺杂的LiMnO2表现出较少的阳离子混排和跺堆层错，其中材料Li1.08Al0.0625Mn0.9375O1.92F0.08的电化学性能最佳，该材料以0．2C的倍率循环充放电，最大放电比容量可达129．28mAh／g，50次循环后放电比容量仍保持在124．26mAh／g以上，容量保持率为96．12％。
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| 关 键 词： | 锂离子电池 正极材料 LiMnO2 Al F共掺杂 |
Preparation of LiMnO_2 by high-temperature solid-state method and its modification by doping |
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| CHEN Meng,CAI Zhi,AO Wen-le,LIU Yao.Preparation of LiMnO_2 by high-temperature solid-state method and its modification by doping[J].Chinese Battery Industry,2009,14(4):227-230. |
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| Authors: | CHEN Meng CAI Zhi AO Wen-le LIU Yao |
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| Affiliation: | CHEN Meng,CAI Zhi,AO Wen-le,LIU Yao(College of Material Science , Chemical Engineering,Harbin Engineering University,Harbin,Heilongjiang 150001,China) |
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| Abstract: | Orthorhombic LiMnO2 and Li1.08MnO1.92F0.08, Li1.08Al0.0625Mn0.9375O1.92F0.08 doped cathode materials were synthesized by solid-state method.The crystalline structure of prepared cathode materials was characterized by XRD.The morphology of the materials were tested by SEM.The electrochemical performances of the materials were tested by constant-current cyclic testing and electrochemical impedance spectroscopy.The results showed that, in structure, Li1.08MnO1.92F0.08,Li1.08Al0.0625Mn0.9375O1.92F0.08 had less ... |
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| Keywords: | LiMnO2 |
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