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首页> 外文期刊>ACS applied materials & interfaces >Gas-Phase Functionalization of Macroscopic Carbon Nanotube Fiber Assemblies: Reaction Control, Electrochemical Properties, and Use for Flexible Supercapacitors
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Gas-Phase Functionalization of Macroscopic Carbon Nanotube Fiber Assemblies: Reaction Control, Electrochemical Properties, and Use for Flexible Supercapacitors

机译：宏观碳纳米管纤维组件的气相官能化：反应对照，电化学性质，以及用于柔性超级电容器的用途

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摘要

The assembly of aligned carbon nanotubes (CNTs) into fibers (CNTFs) is a convenient approach to exploit and apply the unique physico-chemical properties of CNTs in many fields. CNT functionalization has been extensively used for its implementation into composites and devices. However, CNTF functionalization is still in its infancy because of the challenges associated with preservation of CNTF morphology. Here, we report a thorough study of the gas-phase functionalization of CNTF assemblies using ozone which was generated in situ from a UV source. In contrast with liquid-based oxidation methods, this gas-phase approach preserves CNTF morphology, while notably increasing its hydrophilicity. The functionalized material is thoroughly characterized by Raman spectroscopy, X-ray photoelectron spectroscopy, transmission electron microscopy, and scanning electron microscopy. Its newly acquired hydrophilicity enables CNTF electrochemical characterization in aqueous media, which was not possible for the pristine material. Through comparison of electrochemical measurements in aqueous electrolytes and ionic liquids, we decouple the effects of functionalization on pseudocapacitive reactions and quantum capacitance. The functionalized CNTF assembly is successfully used as an active material and a current collector in all-solid supercapacitor flexible devices with an ionic liquid-based polymer electrolyte.
机译：将对齐的碳纳米管（CNTs）的组装成纤维（CNTF）是利用和应用许多领域中CNT的独特物理化学性质的方便方法。 CNT功能化已广泛用于其实现复合材料和设备。然而，由于与保存CNTF形态相关的挑战，CNTF官能化仍处于初期。在这里，我们报告了使用从UV源原位产生的臭氧来彻底研究CNTF组件的气相官能化。与基于液体基氧化方法相比，这种气相方法保留了CNTF形态，同时显着增加了其亲水性。官能化材料通过拉曼光谱，X射线光电子能谱，透射电子显微镜和扫描电子显微镜进行彻底表征。其新获得的亲水性使得水性介质中的CNTF电化学表征能够，这是不可能的原始材料。通过在水电解质和离子液体中的电化学测量比较，我们将官能化对假偶联反应和量子电容的影响分离。官能化的CNTF组件被成功用作有源材料和集体固体超级电容器柔性器件中的集电器，具有离子液体基聚合物电解质。

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