柔性线状电极与储能器件
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摘要
可纺织储能器件是可穿戴电子器件的重要构件单元之一,它对传统的电极结构提出了新的要求,其中线状电极与器件是这一方向的发展的重点。我们在碳基线状电极及储能器件方面开展了系统的研究,具体如下:(1)利用湿纺制备出高导电碳纳米管/石墨烯复合纤维用于线状超级电容器,揭示出电极电阻对储能的损耗,并给出了通过多根并联来降低内阻的方法~[1]。(2)通过在金属丝上预生长NiO纳米墙阵列为基底生长高密度的碳纳米管薄膜,以该线状电极构建的超级电容器展示了优秀的比容量和倍率性能~[2]。(3)提出了碳纳米管-石墨烯-金属丝线状电极平台的制备方法,以此平台构建金属氧化物、MOF和导电聚合物等多功能电极,用于超级电容器等器件。(4)利用毛细作用制备石墨烯等碳基柔性线状电极,构筑了线状锂硫和锂空气电池。在报告中,除了介绍本课题组的线状电极与器件工作外,对线状能源器件的未来发展提出分析和展望。
Wire-shaped supercapacitors and batteries open up a possibility to provide energy for wearable electronics and help these portable devices being developed with smaller, lighter and thinner configuration than ever before. One critical issue to construct such a type of energy storage devices is engineering traditional electrode materials into fiber, wire or yarn architectures. In this talk, we present our effort aimed at manufacturing flexible wire-shaped carbon-based electrodes, including the preparation of CNT/graphene fibers using wet spinning approach, directly growing carbon nanofibers on Kovar metal wires, step-wisely growing MnO_2-CNT-graphene hybrids on Ni wires and in tubes. These achievements provided us a powerful platform for the preparation of high-performance wire-shaped supercapacitors, lithium-sulfur batteries and lithium-air batteries. Besides, we will give an outlook of the future development of wire-shaped energy storage devices in summary.
引文
[1]Ma,Y.;Li,P.;Sedloff,J.;Zhang,X.,Zhang,H.,Liu,J.ACS Nano 2015,9:1352.
    [2]Zhu,G.;Chen,J.;Zhang,Z.;Kang,Q.;Feng,X.;Li,Y.;Huang,Z.;Wang,L.,Ma,Y.Chem.Commun.2016,52:2721.

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