电化学SPM研究锂离子在固体中的输运机制

项目名称： 电化学SPM研究锂离子在固体中的输运机制

项目编号： No.21303236

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 数理科学和化学

项目作者： 沈彩

作者单位： 中国科学院宁波材料技术与工程研究所

项目金额： 25万元

中文摘要： 为加快高性能锂离子电池的研发，改变"尝试"法筛选电池电极材料的现状，有必要利用原位纳米级高精度的表征技术对电池电极结构进行深入观察和分析。本项目将利用包括原位电化学原子力显微镜(EC-AFM)、导电原子力显微镜(C-AFM)、定量纳米力学性质测量（QNM-AFM）等先进模式的原子力显微镜技术结合其他传统分析手段如电化学阻抗谱等来研究全固态锂离子电池。针对电池电极结构、固态电解质在冲放电过程中由于锂离子迁移所引起的表面形貌结构、表面电性能以及表面应力的变化进行研究。了解使用了不同黏结剂的电极结构在充放电条件下的结构、性能变化及其对电池整体性能的影响。探索制约全固态锂离子电池实际电池容量如离子迁移速率、固固界面电阻等一些关键问题。本项目将从纳米尺度直观地揭示（准）真实条件下锂离子电池工作状态下的结构变化，所获研究结果将能够为新材料的设计和开发提供理论和基础支撑。

中文关键词： 锂离子电池；电化学；原子力显微镜；；

英文摘要： For the past two decades, we have been experiencing a fast development of lithium-ion battery with good performance that is benefited form a better understanding of the cathode and anode as well as electrolyte materials. However, most previous studies are from a macroscopic view, and lack the information from the surface/interface of materials. To further improve the performance of lithium-ion-battery, it is important to understand these surface/interface phenomenons, including ion transportation, interface reaction, and surface strain that is induced by charge/discharge. In this project, we will use advanced scanning probe microscopy techniques,including Electrochemical Atomic Force Microscopy (EC-AFM), and Quantitative Nanomechanical Property Mapping Atomic Force Microscopy (QNM-AFM) to study the surface topography, electrical property, and mechanical property of electrodes. Combinding these advanced techniques with other traditional techniques such as XRD, SEM, TEM, we envision that some critical issues that limiting the development of high performance lithium-ion-battery can be cleared. The results evolved from this project will also shine light for further design and development of better materials for lithium-ion-battery.

英文关键词： Lithium ion battery；Electrochemistry；Atomic force microscopy；；