arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1902.04770cond-mat.mtrl-sci
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宏观碳纳米管纤维织物的气相功能化:反应控制,电化学性能和用于柔性超级电容器

Gas-phase functionalization of macroscopic carbon nanotube fiber fabrics: reaction control, electrochemical properties and use for flexible supercapacitors

Daniel Iglesias, Evgeny Senokos, Belén Alemán, Laura Cabana, Cristina Navío, Rebeca Marcilla, Maurizio Prato, Juan J. Vilatela, Silvia Marchesan

摘要:

定向碳纳米管(CNT)组装成纤维(CNTF)是开发和应用CNT独特的物理化学性质的一种方便的方法。CNT功能化已被广泛用于将其实现到复合材料和器件中。然而,CNTF功能化仍处于起步阶段,由于与CNTF形态保存相关的挑战。在这里,我们报告了一个彻底的研究CNTF织物的气相功能化,使用臭氧产生的原位从紫外线源。与基于液体的氧化方法相比,这种气相方法保留了CNTF的形态,同时显著增加了其亲水性。通过Raman、XPS、TEM和SEM对功能化材料进行了全面表征。其新获得的亲水性使CNTF在水介质中的电化学特性,这是不可能的原始材料。通过比较在水电解质和离子液体中的电化学测量,我们解耦了功能化对赝电容反应和量子电容的影响。功能化CNTF织物成功地用作具有基于离子液体的聚合物电解质的全固体超级电容器柔性装置中的活性物质和集流体。

英文摘要:

The assembly of aligned carbon nanotubes (CNT) into fibers (CNTF) 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 their implementation into composites and devices. However, CNTF functionalization is still in its infancy, due to the challenges associated with preservation of CNTF morphology. Here, we report a thorough study of the gas-phase functionalization of CNTF fabrics using ozone that was generated in situ from a UV-source. By contrast with liquid-based oxidation methods, this gas-phase approach preserves CNTF morphology, whilst notably increasing its hydrophilicity. The functionalized material is thoroughly characterized by Raman, XPS, TEM and SEM. 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 electrolyte and ionic liquid we decouple the effects of functionalization on pseudocapacitive reactions and quantum capacitance. The functionalized CNTF fabric is successfully used as active material and current collector in all-solid supercapacitor flexible devices with ionic liquid-based polymer electrolyte.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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