Department of Chemical Engineering , University of Seoul , Seoul 02504 , Republic of Korea.
ACS Appl Mater Interfaces. 2018 Dec 19;10(50):43993-43999. doi: 10.1021/acsami.8b15066. Epub 2018 Dec 5.
Dual-function electrochromic supercapacitors (ECSs) that indicate their real-time charge capacity in color are fabricated using tungsten trioxide (WO) and Li-doped ion gels containing hydroquinone (HQ). The ECSs can simultaneously serve as either electrochromic devices or supercapacitors. The coloration/bleaching and charging/discharging characteristics are investigated between 0 and -1.5 V. At the optimal HQ concentration, large transmittance contrast (∼91%), high coloration efficiency (∼61.9 cm/C), high areal capacitance (∼13.6 mF/cm), and good charging/discharging cyclic stability are achieved. Flexible ECSs are fabricated on plastic substrates by exploiting the elastic characteristics of the gel electrolytes, and they exhibit good bending durability. Moreover, practical feasibility is evaluated by demonstrating the use of the ECSs as an energy storage device and a power source.
采用三氧化钨（WO）和含有对苯二酚（HQ）的掺锂离子凝胶制备了兼具实时电量指示功能的变色超级电容器（ECS）。该 ECS 可同时作为电致变色器件或超级电容器使用。在 0 到-1.5 V 的电压范围内对其变色/褪色和充/放电特性进行了研究。在 HQ 的最佳浓度下，实现了较大的透光率对比度（约 91%）、较高的着色效率（约 61.9 cm/C）、较高的面电容（约 13.6 mF/cm）和良好的充/放电循环稳定性。通过利用凝胶电解质的弹性特性，在塑料基板上制备了柔性 ECS，其表现出良好的弯曲耐久性。此外，还通过演示 ECS 用作储能装置和电源来评估其实用可行性。
