电阻抗
电极
等效电路
材料科学
扩散
电池(电)
电化学电池
锂(药物)
电化学
化学
电气工程
热力学
电压
物理
工程类
医学
功率(物理)
物理化学
内分泌学
作者
Marc Doyle,Jeremy P. Meyers,John Newman
出处
期刊:Journal of The Electrochemical Society
[The Electrochemical Society]
日期:2000-01-01
卷期号:147 (1): 99-99
被引量:184
摘要
A mathematical model is developed to simulate the impedance response of a wide range of lithium rechargeable battery systems. The mathematical model is a macroscopic model of a full‐cell sandwich utilizing porous electrode theory to treat the electrode region and concentrated solution theory for transport processes in solution. Insertion processes are described with charge‐transfer kinetic expressions and solid‐phase diffusion of lithium into the active electrode material. The impedance model assumes steady‐state conditions and a linear response with the perturbation applied about the open‐circuit condition for the battery. The simulated impedance response of a specific system, the lithium‐polymer cell , is analyzed in more detail to illustrate several features of the impedance behavior. Particular attention is paid to the measurement of solid‐phase lithium‐ion diffusion coefficients in the insertion electrodes using impedance techniques. A number of complications that can lead to errors in diffusion‐coefficient measurements based on impedance techniques are discussed. © 2000 The Electrochemical Society. All rights reserved.
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