原子层沉积技术对锂离子电池电极材料的表面处理研究

项目名称： 原子层沉积技术对锂离子电池电极材料的表面处理研究

项目编号： No.51302007

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 一般工业技术

项目作者： 王新炜

作者单位： 北京大学

项目金额： 25万元

中文摘要： 锂离子电池技术是能源研究领域的一个非常重要内容。其中，电极是锂离子电池最关键的核心部件，而电极的表面处理对其电化学性能的影响巨大。原子层沉积（ALD）镀膜技术作为新颖先进的薄膜制备技术，其所制备的薄膜具有均匀、致密、高保形性等特点，尤其适合在多孔材料表面均匀成膜，因此，它在处理介观多孔电极材料表面时就具有特别的优势。本拟将ALD应用于对锂离子电池正负电极材料的表面处理研究中，侧重于引入新型ALD材料，通过大量表面薄膜材料的表征和电化学的表征，深入系统地研究ALD处理对电极材料的充放电循环性、倍率性、稳定性等方面的影响机制，并提出理论模型，以解释实验中ALD引起的性能变化。本研究将最先进的ALD技术应用在锂离子电池研究中，不仅可以帮助获得高性能的电极材料，也可以进一步推动ALD技术本身的发展，因此本项目具有基础研究价值和重要的潜在应用价值。

中文关键词： 原子层沉积；锂离子电池；新材料；表面处理；薄膜技术

英文摘要： Lithium-ion battery (LIB) technology is a very important technology in the reasearch area of energy materials. The battery electrodes are the key components of LIBs, and the surface treatment of the electrodes plays a significant role in determining their electrochemical properties. Atomic layer deposition (ALD) technology is a novel and advanced thin film deposition technology. The films grown by ALD are normally uniform, dense, and conformal, so ALD is very suitable for uniformly coating films on porous materials. As many LIB electrode materials are indeed porous, ALD should be particularly beneficial for treating their surface. This project aims at applying this advanced technology of ALD in the surface treatment of LIB cathods and anodes, focusing on realizing the ALD process of new materials, through careful structural and electrical charaterizations, to investigate, in great detail, the effects of ALD treatment on the electrochemical properties of the electrodes, such as cyclability, charging rate, stability, etc. Thereafter, a model will be proposed to explain the experimentally observed changes that ALD introduces. Applying this advanced technology of ALD in the study of LIBs will not only promote the properties of the electrodes, but also advance the development of the ALD technology itself. The

英文关键词： Atomic layer deposition；lithium ion batteries；novel materials；surface treatment；thin film technology