石墨烯纤维具有优异的力学、电学和电化学性能以及良好的柔性，是设计组装线状柔性储能器件的关键电极材料。目前研究主要集中在低能量密度的线状超级电容器方面，但在高能量密度的线状锂离子电池领域尚无报道，而后者非常有望满足可穿戴电子和智能服装供电的特殊紧迫需求。受限于石墨烯自身物理性质以及易自堆积等问题，纯石墨烯纤维作为锂电池负极的比容量较低，且不能作为锂电池正极，仅依靠纯石墨烯纤维无法满足线状柔性锂电池的应用要求。针对以上问题，本项目拟通过纺前杂化（一步法）和纺后杂化（两步法）向石墨烯纤维中引入高比容量的正/负极活性物质，研究活性物质与石墨烯之间界面相互作用规律，得到长度连续、强度较高、比容量大的杂化纤维正/负极。将杂化纤维正极和负极组装成稳定的线状锂离子电池，系统研究电极组成和结构对电池性能的影响规律。最后通过编织、缠绕等方式进一步获得织物状和可拉伸的锂离子电池，探索其在可穿戴电子和智能服装中。

Graphene fibers with excellent mechanical, electrical and electrochemical properties and good flexibility are very suitable for the preparation of fiber-shaped flexible energy storage devices. Currently, graphene fibers are mainly used to fabricate flexible supercapacitor with low energy density, no research effort has been devoted to graphene fiber-based lithium-ion batteries which are expected to meet the special needs of wearable electronics and smart clothing. Limited by the nature of graphene as well as their restacking problem, pure graphene fiber-based energy storage devices usually have low capacitance, which greatly limits their practical applications. To address these problems, in this project we intend to employ two methods to introduce active materials into graphene fiber to fabricate high-performance composite fiber electrodes and study the interactions between active materials and graphene.Then we assemble the obtained composite fibers into continuous and stable fiber-shaped lithium ion battery and study the influences of the composition and structure of the electrode on the battery. Finally, we weave the obtained flexible lithium-ion battery into fabric and explore their potential application in the wearable electronic devices.