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Soluble triarylamine functionalized symmetric viologen for all-solid-state electrochromic supercapacitors
Science China Chemistry ( IF 9.6 ) Pub Date : 2020-08-13 , DOI: 10.1007/s11426-020-9789-9
Yanling Zhuang , Weiwei Zhao , Longlu Wang , Feiyang Li , Weikang Wang , Shujuan Liu , Wei Huang , Qiang Zhao

Electrochromic supercapacitors have drawn enormous attention due to their ability to monitor the charge and discharge processes through color changes of electroactive materials. However, there are few work on small organic molecules as active materials for all-solid-state electrochromic supercapacitors. Herein, we reported two novel multifunctional symmetric viologens (TPA-bpy and CZ-bpy), which showed different solvatochromic, electrochromic, electroluminochromic and energy storage behaviors despite their similar chemical structures. The different performances between these two viologens were attributed to the difference in the intramolecular charge transfer capability and the solubility in organic solvents. Devices containing TPA-bpy displayed faster response time and higher coloration efficiency due to the introduction of packing-disruptive and three-dimensional triarylamine groups. Moreover, devices containing TPA-bpy also showed energy storage characteristics with an obvious color change from purple to yellow. It showed a wide voltage window (2.0 V), long discharge time (230.3 s at 0.01 mA cm−2), and excellent cycling stability with 90% capacitance retention after 6,000 cycles. The work provides a new and convenient strategy towards the development of novel electrochromic capacitive materials.



中文翻译:

适用于全固态电致变色超级电容器的可溶性三芳基胺官能化对称紫精

电致变色超级电容器由于具有通过电活性材料的颜色变化来监视充电和放电过程的能力而备受关注。但是,关于有机小分子作为全固态电致变色超级电容器活性材料的研究很少。在这里,我们报道了两种新型的多功能对称紫精(TPA-bpy和CZ-bpy),尽管它们具有相似的化学结构,但它们表现出不同的溶剂变色,电致变色,电致发光和能量存储行为。这两种紫精之间的不同性能归因于分子内电荷转移能力和在有机溶剂中的溶解度的差异。由于引入了破坏包装和三维三芳基胺基团,包含TPA-bpy的设备显示出更快的响应时间和更高的着色效率。此外,包含TPA-bpy的设备还显示出能量存储特性,颜色从紫色变为黄色。它显示出宽电压窗口(2.0 V),较长的放电时间(0.01 mA厘米时为230.3 s)-2),以及出色的循环稳定性,在6,000次循环后具有90%的电容保持率。这项工作为开发新型电致变色电容材料提供了一种新的便捷策略。

更新日期:2020-08-17
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