| 锂离子电池正极材料LiNi_(0.8)Co_(0.2)O_2的制备与表征 |
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| 引用本文： | 汤宏伟,朱志红,常照荣,陈中军.锂离子电池正极材料LiNi_(0.8)Co_(0.2)O_2的制备与表征[J].河南师范大学学报(自然科学版),2007,35(3):77-79. |
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| 作者姓名： | 汤宏伟 朱志红 常照荣 陈中军 |
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| 作者单位： | 河南师范大学,化学与环境科学学院,河南,新乡,453007 |
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| 摘 要： | 用2次干燥化学共沉淀法制得高密度前驱体Ni0.8Co0.2(OH)2,使之与LiOH.H2O混合经过2个恒温阶段烧结(600℃恒温6 h、850℃恒温24 h)得到LiNi0.8Co0.2O2材料,探讨了镍源、Li/(Ni+Co)摩尔比、合成温度、合成时间等因素对产品的影响,从而优化了LiNi0.8Co0.2O2的合成工艺.所得非球形LiNi0.8Co0.2O2粉末振实密度高达2.94 g/cm3,X射线衍射分析表明该材料具有规整的层状NaFeO2结构,充放电测试表明材料具有良好的电化学性能.
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| 关 键 词： | 锂离子电池 正极材料 LiNi0.8Co0.2O2 |
| 文章编号： | 1000-2367（2007）03-0077-03 |
| 修稿时间： | 2007-03-12 |
Preparation and Characterization of LiNi0.8Co0.2O2 |
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| TANG Hong-wei,ZHU Zhi-hong,CHANG Zhao-rong,CHEN Zhong-jun.Preparation and Characterization of LiNi0.8Co0.2O2[J].Journal of Henan Normal University(Natural Science),2007,35(3):77-79. |
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| Authors: | TANG Hong-wei ZHU Zhi-hong CHANG Zhao-rong CHEN Zhong-jun |
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| Institution: | College of Chemistry and Environmental Science, Henan Normal University,Xinxiang 453007,China |
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| Abstract: | Precursor-Ni0.8Co0.2(OH)2 with high tapping density was prepared by second stage drying method.High density LiNi0.8Co0.2O2 powder was synthesized by sintering the Ni0.8Co0.2(OH)2 and LiOH·H2O at 600 ℃ for 6 h and 850 ℃ for 24 h.The influences of preparation conditions such as raw materials,the mole ratio of Li/(Ni+Co),the sintering temperature and the reaction time of the product were discussed.The synthetic technology was optimized.The tap density of the prepared non-spherical LiNi0.8Co0.2O2 powder reaches 2.94 g/cm3.XRD results showed the material LiNi0.8Co0.2O2 with order NaFeO2 layer structure.Electrochemical property tests testified that material had good electrochemical performance. |
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| Keywords: | lithium-ion batteries cathode material LiNi0 8Co0 2O2 |
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