Electrochemical Techniques for Intercalation Electrode Materials in Rechargeable Batteries,Accounts of Chemical Research

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Electrochemical Techniques for Intercalation Electrode Materials in Rechargeable Batteries
Accounts of Chemical Research ( IF 16.4 ) Pub Date : 2017-03-16 00:00:00 , DOI: 10.1021/acs.accounts.7b00031
Yujie Zhu ₁ , Tao Gao ₂ , Xiulin Fan ₂ , Fudong Han ₂ , Chunsheng Wang ₂

Affiliation

Understanding of the thermodynamic and kinetic properties of electrode materials is of great importance to develop new materials for high performance rechargeable batteries. Compared with computational understanding of physical and chemical properties of electrode materials, experimental methods provide direct and convenient evaluation of these properties. Often, the information gained from experimental work can not only offer feedback for the computational methods but also provide useful insights for improving the performance of materials. However, accurate experimental quantification of some properties can still be challenging. Among them, chemical diffusion coefficient is one representative example. It is one of the most crucial parameters determining the kinetics of intercalation compounds, which are by far the dominant electrode type used in rechargeable batteries. Therefore, it is of significance to quantitatively evaluate this parameter. For this purpose, various electrochemical techniques have been invented, for example, galvanostatic intermittent titration technique (GITT), potentiostatic intermittent titration technique (PITT), electrochemical impedance spectroscopy (EIS), and cyclic voltammetry (CV). One salient advantage of these electrochemical techniques over other characterization techniques is that some implicit thermodynamic and kinetic quantities can be linked with the readily measurable electrical signals, current, and voltage, with very high precision. Nevertheless, proper application of these techniques requires not just an understanding of the structure and chemistry of the studied materials but sufficient knowledge of the physical model for ion transport within solid host materials and the analysis method to solve for chemical diffusion coefficient.

中文翻译：

充电电池中嵌入电极材料的电化学技术

了解电极材料的热力学和动力学特性对于开发用于高性能可充电电池的新材料非常重要。与对电极材料的物理和化学性质的计算理解相比，实验方法提供了对这些性质的直接和方便的评估。通常，从实验工作中获得的信息不仅可以为计算方法提供反馈，而且还可以为提高材料性能提供有用的见解。但是，对某些特性进行精确的实验量化仍然很困难。其中，化学扩散系数是一个代表性的例子。它是决定插层化合物动力学的最关键参数之一，迄今为止，它们是可再充电电池中使用的主要电极类型。因此，定量评估该参数具有重要意义。为此目的，已经发明了各种电化学技术，例如，恒电流间歇滴定技术（GITT），恒电位间歇滴定技术（PITT），电化学阻抗谱（EIS）和循环伏安法（CV）。这些电化学技术相对于其他表征技术的一个显着优势是，一些隐式的热力学和动力学量可以与非常容易测量的电信号，电流和电压相关联，并且具有很高的精度。尽管如此，

更新日期：2017-03-16

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