In this work, cyclic voltammetry and electrochemical impedance spectroscopy (EIS) techniques have been used to study the lithiation/delithiation of graphite using powder microelectrode in a 1.2 M LiPF₆ in EC:EMC electrolyte. The advantage of using the powder microelectrode is the possibility to easily study graphite without any additive and determine electrochemical characteristics of Li-insertion. The use of cyclic voltammetry at very low scan rates allows to estimate the diffusion coefficient of lithium inside graphite. The exchange current density of graphite for several state of charge (SoC) has also been determined by EIS measurements. Moreover, the powder microelectrode is a useful tool to study the formation of the solid electrolyte interphase (SEI) on graphite either by cyclic voltammetry or EIS.

在这项工作中，循环伏安法和电化学阻抗谱（EIS）技术已用于研究在EC：EMC电解质中的1.2 M LiPF ₆中使用粉末微电极对石墨的锂化/去锂化。使用粉末微电极的优点是可以轻松地研究不含任何添加剂的石墨并确定锂插入的电化学特性。在非常低的扫描速率下使用循环伏安法可以估算锂在石墨内部的扩散系数。几种电荷状态（SoC）的石墨交换电流密度也已通过EIS测量确定。此外，粉末微电极是研究循环伏安法或EIS在石墨上形成固态电解质中间相（SEI）的有用工具。