锂离子电池电极界面特性研究方法

Methods on Investigating Properties of Electrode/Electrolyte Interfaces in Lithium-Ion Batteries

电极界面特性是影响锂离子电池充放电循环容量与稳定性的重要因素。本文总结了目前对电极界面特性进行研究的方法,主要包括传统的电化学方法、显微方法、谱学方法、电化学石英微晶天平等,重点论述了上述研究方法的原理、优缺点和在研究电极界面特性中的应用,以及这些方法相结合所取得的一些研究进展,并指出在今后的工作中,无论是对新材料的研究还是传统材料的研究,这些方法都仍将发挥重要作用。

The rechargeable lithium-ion battery has been extensively used in mobile communication and portable instruments due to its many advantages, such as high volumetric and gravimetric energy density and low self-discharge rate. In addition, it is the most promising candidate as the power source for （hybrid） electric vehicles and stationary energy storage. The properties of electrode/electrolyte interfaces play an important role in the electrochemical performance of the electrode material and a battery, such as the capacities, irreversible charge ＂loss＂, rate capability and cyclability. In present paper, the methods to investigate the properties of electrode/ electrolyte interfaces, for example, traditional electrochemical methods, microscopy methods, spectroscopic methods, electrochemical quartz crystal microgravimetry （EQCM） are summarized. The principles, advantages and disadvantages of these methods and their applications in investigating the properties of electrode/electrolyte interfaces, especially the progress in the combination of these methods to investigate the properties of electrode/ electrolyte interfaces, are introduced in detail, and these methods will be considerable to study the new materials or the traditional materials for lithium-ion batteries in the future.