锂离子电池电极材料原子尺度结构表征

Uncovering the atomic-scale structure of electrode materials for lithium ion batteries

材料显微结构与性能之间的关联是材料科学领域的基本问题。球差校正透射电子显微镜的成功问世为表征材料原子尺度精细结构、揭示材料结构和性能的关系提供了重要机遇。文章主要从作者自身的研究工作出发,综述了原子分辨球差校正扫描透射成像技术在研究锂离子电池电极材料不同电化学状态下的表/界面结构及其反应机理方面的应用,探讨了电极材料原子尺度结构与性能之间的内在联系。

The correlation between microstructure and properties is a fundamental issue in material science. The success of aberration-corrected transmission electron microscopy has provid-ed an unprecedented opportunity to characterize the atomic-scale structure of materials and to eluci-date the relationship between microstructure and performance. In this paper, we review the recent progress in investigations of the surface and/or interface structure of electrode materials after elec-trochemical cycling and their reaction mechanisms through atomic-resolved spherical aberra-tion-corrected scanning transmission electron microscopy. The inherent correlation between the atomic-scale structure of electrode materials and their performance is also discussed.