| 嵌入化合物电极的电化学阻抗谱: 模型与理论模拟 |
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| 引用本文： | 徐守冬,庄全超,史月丽,朱亚波,邱祥云,孙智.嵌入化合物电极的电化学阻抗谱: 模型与理论模拟[J].物理化学学报,2011,27(10):2353-2359. |
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| 作者姓名： | 徐守冬 庄全超 史月丽 朱亚波 邱祥云 孙智 |
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| 作者单位： | 1. Li-ion Batteries Laboratory, School of Materials Science and Engineering, China University of Mining and Technology, Xuzhou 221116, Jiangsu Province, P. R. China;
2. School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou 221116, Jiangsu Province, P. R. China |
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| 基金项目： | 中央高校基本科研业务费专项资金项目，中国矿业大学科技攀登计划项目，江苏省自然科学研究基金 |
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| 摘 要： | 建立了单个嵌入化合物颗粒、混合颗粒、厚度均匀多孔电极层以及非均匀、多层多孔电极层的理论模型,模拟得了了上述模型的相对应电化学阻抗谱（EIS）特征.结果表明,单个颗粒和混合颗粒表现出相似的阻抗谱特征,均由高频区域内与锂离子通过固体电解质相界面（SEI）膜过程相关的RSEI‖CSRI半圆,与电荷传递过程相关的Rct‖Cdl半圆以及锂离子在固体颗粒内部的扩散相关的斜线三部分组成.对于非均匀、多层多孔嵌入电极而言,一个个新奇的现象就是在阻抗谱中会出现三个半圆,影响第三个半圆现现并形成的因素主要为电极中的颗粒尺寸分布以及电极层的厚度分布,也就是说电极片中出现不同尺寸分布的颗粒以及形成薄厚两种电极层的时候,容易导致阻抗谱中出现第三个半圆.
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| 关 键 词： | 锂离子电池 嵌入化合物 非均匀 多孔电极 电化学阻抗谱 |
| 收稿时间： | 2011-05-04 |
| 修稿时间： | 2011-08-15 |
Electrochemical Impedance Spectra of Intercalation Compound Electrodes: Models and Theoretical Simulations |
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| XU Shou-Dong,ZHUANG Quan-Chao,SHI Yue-Li,ZHU Ya-Bo,QIU Xiang-Yun,SUN Zhi.Electrochemical Impedance Spectra of Intercalation Compound Electrodes: Models and Theoretical Simulations[J].Acta Physico-Chimica Sinica,2011,27(10):2353-2359. |
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| Authors: | XU Shou-Dong ZHUANG Quan-Chao SHI Yue-Li ZHU Ya-Bo QIU Xiang-Yun SUN Zhi |
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| Institution: | 1. Li-ion Batteries Laboratory, School of Materials Science and Engineering, China University of Mining and Technology, Xuzhou 221116, Jiangsu Province, P. R. China;
2. School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou 221116, Jiangsu Province, P. R. China |
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| Abstract: | Single intercalation particles,mixed particles,homogeneous porous electrodes and nonhomogeneous,multilayered porous electrode models are proposed in this paper.Some peculiar features of impedance spectra were simulated using the above-mentioned models.The results reveal that the features of impedance spectra of the single intercalation particle and the mixed particles are the same and the features consist of lithium ion migration through the solid electrolyte interphase(SEI) film(R_(SEI)||C_(SEI) semicircle... |
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| Keywords: | Lithium ion battery Intercalation compound Nonhomogeneous Porous electrode Electrochemical impedance spectroscopy |
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