| 单斜层状LiMnO2的球磨-离子交换法合成及其电化学性能研究 |
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| 引用本文： | 许天军,叶世海,王永龙,梁霍秀,高学平,宋德瑛.单斜层状LiMnO2的球磨-离子交换法合成及其电化学性能研究[J].无机化学学报,2005,21(7):993-998. |
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| 作者姓名： | 许天军 叶世海 王永龙 梁霍秀 高学平 宋德瑛 |
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| 作者单位： | 南开大学材料化学系,新能源材料化学研究所,天津,300071 |
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| 基金项目： | 国家重点基础研究发展规划(No.2002CB211800)，国家自然科学基金(No.90206043)项目资助。 |
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| 摘 要： | 通过球磨促进固相反应法合成出了具有单斜层状结构的前驱物NaMnO2，随后通过离子交换得到了单斜层状LiMnO2。XRD测试结果显示产物为单相。扫描电镜(SEM)和透射电镜(TEM)观测结果显示LiMnO2的粒子尺寸为300～500 nm，HRTEM分析显示干扰条纹的间距为0.485 nm，基本对应于m-LiMnO2的(001)晶面间距。红外吸收光谱(IR)和X射线光电子能谱(XPS)被用来测量m-LiMnO2中Mn-O键的伸缩和弯曲振动吸收和Mn元素的价态。合成的m-LiMnO2在电化学充放电循环初期表现了较好的电化学性能，但其循环寿命仍需要进一步改善。
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| 关 键 词： | 球磨 单斜晶系 层状LiMnO2 电化学性能 |
| 文章编号： | 1001-4861(2005)07-0993-06 |
| 收稿时间： | 2004/12/1 0:00:00 |
| 修稿时间： | 2004年12月1日 |
Synthesis and Electrochemical Properties of Monoclinic Layered LiMnO2 via Ball-milling and Ion Exchange Reaction |
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| XU Tian-Jun,YE Shi-Hai,WANG Yong-Long,LIANG Huo-Xiu,GAO Xue-Ping and SONG De-Ying.Synthesis and Electrochemical Properties of Monoclinic Layered LiMnO2 via Ball-milling and Ion Exchange Reaction[J].Chinese Journal of Inorganic Chemistry,2005,21(7):993-998. |
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| Authors: | XU Tian-Jun YE Shi-Hai WANG Yong-Long LIANG Huo-Xiu GAO Xue-Ping and SONG De-Ying |
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| Institution: | Institute of New Energy Material of Chemistry, Department of Materials Chemistry, Nankai University, Tianjin 300071,Institute of New Energy Material of Chemistry, Department of Materials Chemistry, Nankai University, Tianjin 300071,Institute of New Energy Material of Chemistry, Department of Materials Chemistry, Nankai University, Tianjin 300071,Institute of New Energy Material of Chemistry, Department of Materials Chemistry, Nankai University, Tianjin 300071,Institute of New Energy Material of Chemistry, Department of Materials Chemistry, Nankai University, Tianjin 300071 and Institute of New Energy Material of Chemistry, Department of Materials Chemistry, Nankai University, Tianjin 300071 |
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| Abstract: | The precursor compound of NaMnO2 with a layered monoclinic structure was synthesized by a method of ball-milling-promoted solid-state reaction. And then pure LiMnO2 with fine structure was obtained via a subsequent ion exchange reaction. The LiMnO2 material was detected as a single phase with a layered monoclinic structure by X-ray diffraction (XRD). The particle size of the m-LiMnO2 material was about 300~500 nm by Scanning Electron Microscopy (SEM) and Transmission Electron Microscopy (TEM). The well-resolved interference fringe spacing is about 0.485 nm from HRTEM, which is consistent with the (001) plane in monoclinic LiMnO2 phase. Infrared (IR) and X-ray Photoelectron Spectra (XPS) were used to measure the stretching and bending vibrations of Mn-O bond and valence state of Mn element in m-LiMnO2 material. The obtained m-LiMnO2 was shown to have a good electrochemical performance as a cathode material for lithium ion batteries. |
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| Keywords: | ball-milling monoclinic layered lithium manganese oxide electrochemical performance |
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