电化学原位拉曼光谱在锂离子电池研究中的应用

项目名称： 电化学原位拉曼光谱在锂离子电池研究中的应用

项目编号： No.21203157

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 物理化学

项目作者： 刘波

作者单位： 厦门大学

项目金额： 24万元

中文摘要： 电化学原位拉曼光谱方法已被广泛应用于分析、表征锂离子电池电极材料。项目针对原位电化学拉曼光谱由于实验限制造成拉曼信号灵敏度差的问题，通过发展原位拉曼表征方法、创新实验技术、利用先进仪器克服原位电化学拉曼光谱在锂离子电池电极界面原位研究中的限制。利用光束激光扫描和线性聚焦结合的超快拉曼激光成像系统获得具有空间分辨和时间分辨的电池材料本体和界面的拉曼光谱信息。通过选择合适的锂离子电池材料体系，探索利用表面增强拉曼光谱（SERS）和壳层隔离的纳米粒子增强拉曼光谱（SHINERS）研究电极界面过程。研究结果将有助于发展锂离子电池界面过程的原位研究方法，为进一步提高锂离子电池电化学性能和安全性能提供理论依据。

中文关键词： 拉曼光谱；锂离子电池；电化学；电极材料；界面过程

英文摘要： This program is to improve the sensitivity of in situ Raman spectroscopy which had been widely applied in analysis and characterization of electrode material for lithium ion batteries by developing the experimental method and configuration. New and pertinent data allowing the identification of the local processes spatially and temporally that contribute to the mechanism of Li ion battery degradation on cycling or aging will be obtained from the great possibilities offered by the advanced Raman imaging technique which combines the slit confocal with laser beam scanning and line illumination. The application of Surface-enhanced Raman spectroscopy (SERS) and Shell-isolated nanoparticle-enhanced Raman spectroscopy (SHINERS) will be investigated to explore the interfacial processes, the formation and variation of the solid electrolyte interface for lithium ion batteries. This program should make the in situ Raman spectroscopy more efficient, in terms of both analytical and mechanistic analysis, and it prompts the interest of this technique for many researchers implicated in materials science applied to the field of energy storage.

英文关键词： Raman spectroscopy；Lithium ion batteries；electrochemistry；electrode materials；interfacial process