| 立方晶系Li0.29Ni0.71O的电化学性质 |
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| 引用本文： | 陈红,王庆伟,别晓非,杜菲,王春忠,寇春雷.立方晶系Li0.29Ni0.71O的电化学性质[J].吉林大学学报(理学版),2013,51(1):120-123. |
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| 作者姓名： | 陈红 王庆伟 别晓非 杜菲 王春忠 寇春雷 |
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| 作者单位： | 1. ,北华大学 物理学院, 吉林 吉林 132013,2. 吉林师范大学 环境友好材料制备与应用省部共建教育部重点实验室, 吉林 四平 136000,3. 吉林大学 物理学院, 长春 130012 |
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| 基金项目： | 吉林省科技发展计划项目(批准号:201205035);环境友好材料制备与应用省部共建教育部重点实验室研究项目 |
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| 摘 要： | 采用熔盐法用Li+ 取代NiO中Ni2+制备了Li0.29Ni0.71O材料, 研究Li+取代Ni2+对材料电化学性能的影响, 并利用电化学阻抗谱(EIS)研究材料的电化学动力学性能. 结果表明: Li0.29Ni0.71O比NiO的电化学容量稍小; 首次充放电循环后, 在材料中形成Li2O; 表面膜(SEI)阻抗的降低和电化学扩散率的增加与材料由晶体转变为非晶态有关.
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| 关 键 词： | 电化学 负极材料 熔盐法 电化学阻抗谱 |
| 收稿时间： | 2012-05-09 |
Electrochemical Performance of Cubic Crystal System Li0.29Ni0.71O |
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| CHEN Hong,WANG Qing-wei,BIE Xiao-fei,DU Fei,WANG Chun-zhong,KOU Chun-lei.Electrochemical Performance of Cubic Crystal System Li0.29Ni0.71O[J].Journal of Jilin University: Sci Ed,2013,51(1):120-123. |
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| Authors: | CHEN Hong WANG Qing-wei BIE Xiao-fei DU Fei WANG Chun-zhong KOU Chun-lei |
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| Institution: | 1. College of Physics, Beihua University, Jilin 132013, Jilin Province, China;
2. Key Laboratory of Preparation and Applications of Environmental Friendly Materials of Ministry of Education, Jilin Normal University, |Siping 136000, Jilin Province, China|3. College of Physics, Jilin University, Changchun 130012, China |
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| Abstract: | A typical Li+ substituted NiO compound, Li0.29Ni0.71O, was synthesized by molten nitrate method, and the effect of Li+ ions doped on the electrochemical performance was also studied. The materail showed a smaller electrochemical capacity compared to NiO. In addition, there was an irreversible formation of Li2O in the first discharge\|charge cycling. The kinetic behavior of Li0.29Ni0.71O was investigated by EIS analysis. The unusual decrease of SEI resistance and the increase of chemical diffusion coefficient in the several initial cycles were explained in terms of the transformation from crystalline to amorphous state of the electrode material. |
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| Keywords: | electrochemistry anode materials molten nitrates method electrochemical impedance spectroscopy |
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