用于柔性锂离子电池的碳纳米管复合电极研究

项目名称： 用于柔性锂离子电池的碳纳米管复合电极研究

项目编号： No.51472141

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 一般工业技术

项目作者： 王佳平

作者单位： 清华大学

项目金额： 83万元

中文摘要： 为了满足各种便携式、可穿戴、可弯折柔性电子器件对储能装置的需求，发展柔性、高容量、安全、稳定的锂离子电池已成为研究热点。柔性锂离子电池的性能与电极材料性能、电极结构设计、界面电子和离子传输、在机械形变等复杂工作条件下的性能稳定性密切相关。碳纳米管具有优异的电学、力学性能和化学稳定性，是构筑柔性电极的理想材料。本项目发展碳纳米管薄膜作为柔性导电网络，通过活性材料在碳纳米管网络的可控均匀负载，构筑导电性好、力学性能优异、比容量高的柔性碳纳米管复合电极。研究内容包括：柔性碳纳米管复合电极的结构设计和制备；柔性电极所涉及的多种界面结构和耦合作用；柔性锂离子电池的系统集成和性能表征。期望构筑出具有优异性能的柔性电极，在界面作用和电子、离子传输等科学问题上有所突破，并用于指导柔性碳纳米管复合电极的结构设计，发展出安全、稳定、具有高能量密度的柔性锂离子电池原型器件，最终推动其在柔性电子设备中的广泛应用。

中文关键词： 柔性；锂离子电池；碳纳米管；复合电极；电化学性能

英文摘要： The research in high performance flexible lithium ion batteries (LIBs) thrives with the increasing demand in novel flexible electronic devices. The development of LIBs highly relies on the improvement of electrode design, performance and stability of the electrode material under mechanical deformation, and efficient interfacial electron and ion transfer. Carbon nanotube (CNT) with excellent electrical and mechanical properties and high chemical stability has received considerable attentions as a candidate material in making high performance electrodes for flexible LIBs. This project focuses on the fabrication of carbon nanotube thin film as the flexible and conductive network, homogeneous loading of active materials onto the carbon nanotube network, and the construction of composite electrodes with high conductivity, excellent mechanical properties, and high capacity for flexible LIBs. We will specifically aim at the following aspects: developing new strategies to design and fabricate novel flexible CNT composite electrodes, understanding the processes of interfacial charge and ion transfers, and characterizing the performance of flexible LIBs under a variety of mechanical deformation. The goals of this project include: achieve high performance flexible CNT composite electrodes, establish mechanistic understanding to interfacial interactions and electron/ion transfer, provide guidance to the structural design of flexible composite electrodes, and finally fuel the extensive applications of high performance LIBs in flexible electronic devices.

英文关键词： flexible;lithium ion battery;carbon nanotube;composite electrode;electrochemical property