物理化学学报2011，Vol.27Issue(10)：2353-2359,7.
嵌入化合物电极的电化学阻抗谱:模型与理论模拟
Electrochemical Impedance Spectra of Intercalation Compound Electrodes: Models and Theoretical Simulations
摘要
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 (RseIIICsEI semicircle), an electron and ion transfer process (Rc1 II Cdi semicircle), and a finite-diffusion Warburg element. For the nonhomogeneous, multilayered porous electrodes model, a peculiar feature of impedance spectra is that a new arc appears in the Nyquist plot. A detailed analysis revealed that a different particle size distribution could lead to the appearance of a new arc and a different layer distribution (a thicker layer and a thinner layer), which could lead to a well-developed semicircle.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Key words
Lithium ion battery/ Intercalation compound/ Nonhomogeneous/ Porous electrode/ Electrochemical impedance spectroscopy分类
化学化工引用本文复制引用
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):2353-2359,7.基金项目
中央高校基本科研业务费专项资金(2010LKHX03,2010QNB04,2010QNB05),中国矿业大学科技攀登计划(ON090237)及江苏省自然科学研究基金(BK2008129)资助项目 （2010LKHX03,2010QNB04,2010QNB05）
