[论文解读] Impedance Spectroscopy for Electroceramics and Electrochemical System

Subrata Karmakar|arXiv (Cornell University)|Jun 15, 2024

Analytical Chemistry and Sensors被引用 6

一句话总结

一个教程式综述，解释阻抗谱（EIS）在电介陶瓷与电化学系统中的理论背景、工作原理与实现，以及如何分解来自体相、晶粒界面与界面的贡献。

ABSTRACT

This tutorial review focuses on the basic theoretical backgrounds, their working principles, and implementation of impedance spectroscopy in both electroceramics and electrochemical research and technological applications. Various contributions to the impedance, admittance, dielectric, and conductivity characteristics of electroceramic materials can be disentangled and independently characterized with the help of impedance spectroscopy as a function of frequency and temperature. In polycrystalline materials, the impedance, charge transport/ conduction mechanism, and the macroscopic dielectric properties i.e., dielectric constant and loss are typically composed of many contributions, including the bulk or grain resistance/capacitance, grain boundary, and sample-electrode interface effect. Similarly, electrochemical impedance spectroscopy (EIS) endeavors to the charging kinetics, diffusion, and mechanical impact of various electrochemical systems widely used in energy storage (i.e., supercapacitor, battery), corrosion resistance, chemical and bio-sensing, diagnostics, etc. in electrolytes as a function of frequency. The understanding of various contributions in the EIS spectra i.e., kinetic control, mass control, and diffusion control is essential for their practical implications. It is demonstrated that electrochemical and electroceramics impedance spectroscopy is an effective method to explain and simulate such behavior. Deconvolute these contributions to obtain a detailed understanding of the functionality of polycrystalline electroceramic materials. This short review aims to endow the expertise of senior researchers in many fields where both EIS (electrochemical and ceramics) are involved, as well as to provide the necessary background information for junior researchers working in these fields.

研究动机与目标

• 解释阻抗谱在应用于电介陶瓷与电化学系统中的基本理论基础。
• 描述在频率和温度范围内如何测量和解释阻抗、导纳、介电和导电性特征。
• 展示如何在多晶材料中分解体相、晶粒边界和界面的贡献。
• 说明在能源存储、耐腐蚀、传感和诊断中的应用。
• 提供适合进入这些领域的资深研究者和初级研究人员的背景知识。

提出的方法

• 讨论阻抗谱的工作原理及其与频率和温度的关系。
• 解释将阻抗谱分解为来自体相（晶粒）电阻/电容、晶界和样品-电极界面的贡献。
• 概述解读充电动力学、扩散和力学效应的电化学阻抗谱数据的策略。
• 演示如何在电介陶瓷和电化学系统中使用EIS概念来模拟和解释观察到的行为。
• 提供面向跨学科研究者的应用EIS于实际研究的指南。

实验结果

研究问题

• RQ1 多晶电介陶瓷中的阻抗谱有何不同的贡献，如何将它们分离？
• RQ2 体相、晶界和界面效应如何随频率和温度变化影响介电和导电性测量？
• RQ3 如何利用EIS分析充电动力学、扩散和机械影响在电化学系统中的作用？
• RQ4 将EIS应用于能源存储、耐腐蚀和传感应用的实际注意事项有哪些？

主要发现

• 阻抗谱可以分离多晶电介陶瓷中的体相、晶界和界面的贡献，从而影响介电和导电性属性。
• EIS提供一个框架，用于解释充电动力学、扩散和机械效应在随频率变化的电化学系统中的表现。
• 该方法在解释和模拟多晶电介陶瓷及相关电化学研究与技术中的行为方面是有效的。
• 本教程为研究者提供在电介陶瓷和电化学背景中应用EIS的背景知识和方法。