Electrochemical Techniques for Intercalation Electrode Materials in Rechargeable Batteries

作者：Yujie Zhu, Tao Gao, Xiulin Fan, Fudong Han, Chunsheng Wang · 发表于：Accounts of Chemical Research · 年份：2017 · DOI：10.1021/acs.accounts.7b00031 · 被引用次数：158 · 研究领域：Advancements in Battery Materials、Advanced Battery Technologies Research、Extraction and Separation Processes

Conspectus 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 pre...