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基于功能碳纤维的柔性纤维状锂离子电池制备及性能研究

批准号51602109 学科分类无机非金属能量存储材料 ( E021002 )
项目负责人蔡欣 负责人职称讲师 依托单位华南农业大学
资助金额20.00
万元
项目类别青年科学基金项目 研究期限2017 年 01 月 01 日 至
2019 年 12 月 31 日
中文主题词柔性电子器件;纤维能源器件;锂离子电池;碳纤维;功能纳米材料
英文主题词flexible electronics;wire-shaped energy devices;lithium-ion batteries;carbon fiber;functional nanomaterials

摘要

中文摘要 柔性可穿戴电子器件在国际前沿研究领域受到极大关注,发展兼容匹配的高效便携电源至关重要。新型的纤维锂离子电池具有突出的可编织与可穿戴特性,在便携电子设备与智能织物等领域具有重要的应用潜力。目前,用于制备高性能纤维锂离子电池的电极材料体系亟待发展。鉴于碳纤维材料优良的力学性能与导电性,本项目以功能碳纤维作为纤维锂离子电池的自支撑活性电极,拟通过设计合理的电极微/纳结构与界面,研究材料组成、薄膜制备以及电池结构等探索基于碳纤维的柔性纤维状锂离子电池的关键制备技术,并系统表征电池的电化学性能与稳定性。通过深入理解功能碳纤维的作用机制及其纤维锂离子电池的基本特性,实现比容量可观(达到250 mAh/g)、性能稳定(循环寿命>200次)的碳纤维基纤维状锂离子电池,进一步丰富纤维锂离子电池的结构设计和电极材料体系,为发展微型、轻质、低成本的柔性可穿戴锂离子电池提供新的思路与有用的依据。
英文摘要 Flexible/wearable electronics have attracted great attention in the international frontier research, and the development of compatible and high-efficiency portable power devices is crucial. As an emerging flexible energy storage technology, novel wire-shaped lithium-ion batteries possess prominent weavability and unique wearable feature, which show promising potential in applications for portable electronics and smart fabrics (textiles). Currently, the electrode materials for the preparation of high performance wire-shaped lithium-ion batteries urgently need to be further developed. In virtue of the excellent mechanical properties and electrical conductivity of carbon fiber materials, functionalized carbon fibers are adopted as free-standing active electrodes for wire-shaped lithium-ion batteries. In this regard, to explore the key fabrication techniques of carbon fiber-based flexible wire-shaped lithium-ion batteries, it aims to rationally design the micro/nano structure and the interfaces of the wire electrodes, with combinative investigation of the material composition, thin film preparation and device architecture/assembly. In addition, the battery electrochemical performance and cycling stability will be systematically characterized as well. With better elucidation of the operation mechanism of the functionalized carbon fiber and the fundamental properties of corresponding wire-shaped lithium-ion batteries, flexible carbon fiber-based wire lithium-ion batteries with considerable specific capacity (250 mAh/g) and durable performance (stable cycling of over 200 cycles ) are expected. Our study will further enrich the structural design and available electrode materials of wire-shaped lithium-ion batteries, which could innovate an alternative strategy and offer some useful basis for advancing miniaturized, lightweight and inexpensive flexible/wearable lithium-ion batteries.
结题摘要

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