| 有机熔盐LiTFSI/NaTf中锂在铝电极上的电极过程 |
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| 引用本文： | 屠晓华,褚有群,马淳安,吴建一,缪程平.有机熔盐LiTFSI/NaTf中锂在铝电极上的电极过程[J].化工学报,2012,63(5):1498-1503. |
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| 作者姓名： | 屠晓华 褚有群 马淳安 吴建一 缪程平 |
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| 作者单位： | 1.嘉兴学院生物与化学工程学院;2.浙江工业大学应用化学系，绿色化学合成技术国家重点实验室培育基地;3.嘉兴市化工清洁工艺重点实验室 |
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| 基金项目： | 嘉兴学院科研启动金项目，嘉兴市化工清洁工艺重点实验室开放基金 |
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| 摘 要： | 采用循环伏安、计时电流和恒电流充放电等电化学测试技术考察了LiTFSI/NaTf熔盐电解质中锂在铝电极上的电化学行为。研究结果表明：在该熔盐中，锂在铝电极上的电化学还原过程伴随着锂铝合金的成核过程，且反应生成的LiAl合金只有一种合金相是可逆的；恒电流循环充放电实验发现，首次循环的库仑效率较低，库仑效率随电流密度的增大而有所减小，但随温度的升高而增大。计时电流实验发现，锂原子嵌入铝电极中形成α-LiAl合金的过程受锂在铝基体内扩散步骤控制，且该扩散系数为1.7×10-10 cm2·s-1。
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| 关 键 词： | 高温 熔盐 铝电极 电化学行为 成核过程 |
| 收稿时间： | 2011-07-22 |
| 修稿时间： | 2012-01-18 |
Electrochemical behavior of Li incorporation into Al in LiTFSI/NaTf organic molten salt |
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| TU Xiaohua
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CHU Youqun
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MA Chun'an
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WU Jianyi
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MIAO Chengping.Electrochemical behavior of Li incorporation into Al in LiTFSI/NaTf organic molten salt[J].Journal of Chemical Industry and Engineering(China),2012,63(5):1498-1503. |
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| Authors: | TU Xiaohua CHU Youqun MA Chun'an WU Jianyi MIAO Chengping |
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| Affiliation: | 1.School of Biological and Chemical Engineering，Jiaxing University；2Department of Applied Chemistry，State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology，Zhejiang University of Technology；3Key Laboratory of Clean Chemical Process of Jiaxing |
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| Abstract: | The electrochemical behavior of lithium incorporation into aluminum electrode in LiTFSI/NaTf molten salt electrolyte was studied with electrochemical techniques,including cyclic voltammetry,chronopotentiometry and chronoamperometry.The reduction reaction was found to involve a nucleation process at the aluminum electrode,and only one LiAl alloy phase was reversible.The galvanostatic cycle experiments showed that the coulombic efficiency was very low in the first cycle and decreased with increasing current density,and increased with increasing operating temperature.The results of chronoamperometry indicated that the incorporation of lithium into aluminum for the formation of α-phase Li-Al alloy was limited by its rate of diffusion,with a measured diffusion coefficient of 1.7×10-10 cm2·s-1. |
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| Keywords: | high temperature molten salt aluminum electrode electrochemical behavior nucleation process |
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