Electrode-Electrolyte Interface in Li-Ion Batteries: Current Understanding and New Insights
Electrode-Electrolyte Interface in Li-Ion Batteries: Current Understanding and New Insights
复制标题
DOI：
10.1021/acs.jpclett.5b01727
复制
发表时间：
2015-11-19
影响因子：
5.7
通讯作者：
Shao-Horn, Yang
中科院分区：
文献类型：
--
作者：
Gauthier, Magali;Carney, Thomas J.;Shao-Horn, Yang
了解电极/电解质界面（EEI）的反应对于开发提高锂电池循环寿命和安全性的策略至关重要。尽管在过去的四十年里的研究，仍然有有限的理解是什么手段不同的组件形成在EEI和他们如何影响EEI层的属性。我们回顾了用于建立众所周知的镶嵌结构模型的EEI（通常称为固体电解质界面或SEI）的负电极，包括锂，石墨，锡和硅的研究结果。对于用于正电极的EEI层的理解少得多。高容量富锂层状氧化物yLi（2-x）MnO（3）中心点（1-y）Li 1-xMO 2可通过氧阴离子氧化还原产生对电解质的高反应性物质，突出了理解与电解质和EEI层的反应以用于先进正极的迫切需要。最近的进展，在原位表征明确的电极表面可以提供机制的见解和策略，以定制EEI层的组成和性能。
Understanding reactions at the electrode/electrolyte interface (EEI) is essential to developing strategies to enhance cycle life and safety of lithium batteries. Despite research in the past four decades, there is still limited understanding by what means different components are formed at the EEI and how they influence EEI layer properties. We review findings used to establish the well-known mosaic structure model for the EEI (often referred to as solid electrolyte interphase or SEI) on negative electrodes including lithium, graphite, tin, and silicon. Much less understanding exists for EEI layers for positive electrodes. High-capacity Li-rich layered oxides yLi(2-x)MnO(3)center dot(1-y)Li1-xMO2, which can generate highly reactive species toward the electrolyte via oxygen anion redox, highlight the critical need to understand reactions with the electrolyte and EEI layers for advanced positive electrodes. Recent advances in in situ characterization of well-defined electrode surfaces can provide mechanistic insights and strategies to tailor EEI layer composition and properties.